Fix GenericFloatingPointPredicateUtils #141258
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@llvm/pr-subscribers-llvm-ir @llvm/pr-subscribers-llvm-adt Author: Tim Gymnich (tgymnich) ChangesPatch is 48.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/141258.diff 14 Files Affected:
diff --git a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h b/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
deleted file mode 100644
index 49c5fe0aed6e1..0000000000000
--- a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,479 +0,0 @@
-//===- llvm/Support/GenericFloatingPointPredicateUtils.h -----*- C++-*-----===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// Utilities for dealing with flags related to floating point properties and
-/// mode controls.
-///
-//===----------------------------------------------------------------------===/
-
-#ifndef LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/FloatingPointMode.h"
-#include "llvm/IR/Instructions.h"
-#include <optional>
-
-namespace llvm {
-
-template <typename ContextT> class GenericFloatingPointPredicateUtils {
- using ValueRefT = typename ContextT::ValueRefT;
- using FunctionT = typename ContextT::FunctionT;
-
- constexpr static ValueRefT Invalid = {};
-
-private:
- static DenormalMode queryDenormalMode(const FunctionT &F, ValueRefT Val);
-
- static bool lookThroughFAbs(const FunctionT &F, ValueRefT LHS,
- ValueRefT &Src);
-
- static std::optional<APFloat> matchConstantFloat(const FunctionT &F,
- ValueRefT Val);
-
- /// Return the return value for fcmpImpliesClass for a compare that produces
- /// an exact class test.
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- exactClass(ValueRefT V, FPClassTest M) {
- return {V, M, ~M};
- }
-
-public:
- /// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
- /// same result as an fcmp with the given operands.
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags};
-
- return fcmpToClassTest(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
-
- auto [Src, ClassIfTrue, ClassIfFalse] =
- fcmpImpliesClass(Pred, F, LHS, ConstRHS, LookThroughSrc);
-
- if (Src && ClassIfTrue == ~ClassIfFalse)
- return {Src, ClassIfTrue};
-
- return {Invalid, fcAllFlags};
- }
-
- /// Compute the possible floating-point classes that \p LHS could be based on
- /// fcmp \Pred \p LHS, \p RHS.
- ///
- /// \returns { TestedValue, ClassesIfTrue, ClassesIfFalse }
- ///
- /// If the compare returns an exact class test, ClassesIfTrue ==
- /// ~ClassesIfFalse
- ///
- /// This is a less exact version of fcmpToClassTest (e.g. fcmpToClassTest will
- /// only succeed for a test of x > 0 implies positive, but not x > 1).
- ///
- /// If \p LookThroughSrc is true, consider the input value when computing the
- /// mask. This may look through sign bit operations.
- ///
- /// If \p LookThroughSrc is false, ignore the source value (i.e. the first
- /// pair element will always be LHS.
- ///
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- FPClassTest RHSClass, bool LookThroughSrc) {
- assert(RHSClass != fcNone);
- ValueRefT Src = LHS;
-
- if (Pred == FCmpInst::FCMP_TRUE)
- return exactClass(Src, fcAllFlags);
-
- if (Pred == FCmpInst::FCMP_FALSE)
- return exactClass(Src, fcNone);
-
- const FPClassTest OrigClass = RHSClass;
-
- const bool IsNegativeRHS = (RHSClass & fcNegative) == RHSClass;
- const bool IsPositiveRHS = (RHSClass & fcPositive) == RHSClass;
- const bool IsNaN = (RHSClass & ~fcNan) == fcNone;
-
- if (IsNaN) {
- // fcmp o__ x, nan -> false
- // fcmp u__ x, nan -> true
- return exactClass(Src, CmpInst::isOrdered(Pred) ? fcNone : fcAllFlags);
- }
-
- // fcmp ord x, zero|normal|subnormal|inf -> ~fcNan
- if (Pred == FCmpInst::FCMP_ORD)
- return exactClass(Src, ~fcNan);
-
- // fcmp uno x, zero|normal|subnormal|inf -> fcNan
- if (Pred == FCmpInst::FCMP_UNO)
- return exactClass(Src, fcNan);
-
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
- if (IsFabs)
- RHSClass = llvm::inverse_fabs(RHSClass);
-
- const bool IsZero = (OrigClass & fcZero) == OrigClass;
- if (IsZero) {
- assert(Pred != FCmpInst::FCMP_ORD && Pred != FCmpInst::FCMP_UNO);
- // Compares with fcNone are only exactly equal to fcZero if input
- // denormals are not flushed.
- // TODO: Handle DAZ by expanding masks to cover subnormal cases.
- DenormalMode Mode = queryDenormalMode(F, LHS);
- if (Mode.Input != DenormalMode::IEEE)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ: // Match x == 0.0
- return exactClass(Src, fcZero);
- case FCmpInst::FCMP_UEQ: // Match isnan(x) || (x == 0.0)
- return exactClass(Src, fcZero | fcNan);
- case FCmpInst::FCMP_UNE: // Match (x != 0.0)
- return exactClass(Src, ~fcZero);
- case FCmpInst::FCMP_ONE: // Match !isnan(x) && x != 0.0
- return exactClass(Src, ~fcNan & ~fcZero);
- case FCmpInst::FCMP_ORD:
- // Canonical form of ord/uno is with a zero. We could also handle
- // non-canonical other non-NaN constants or LHS == RHS.
- return exactClass(Src, ~fcNan);
- case FCmpInst::FCMP_UNO:
- return exactClass(Src, fcNan);
- case FCmpInst::FCMP_OGT: // x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf);
- case FCmpInst::FCMP_UGT: // isnan(x) || x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf | fcNan);
- case FCmpInst::FCMP_OGE: // x >= 0
- return exactClass(Src, fcPositive | fcNegZero);
- case FCmpInst::FCMP_UGE: // isnan(x) || x >= 0
- return exactClass(Src, fcPositive | fcNegZero | fcNan);
- case FCmpInst::FCMP_OLT: // x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf);
- case FCmpInst::FCMP_ULT: // isnan(x) || x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf | fcNan);
- case FCmpInst::FCMP_OLE: // x <= 0
- return exactClass(Src, fcNegative | fcPosZero);
- case FCmpInst::FCMP_ULE: // isnan(x) || x <= 0
- return exactClass(Src, fcNegative | fcPosZero | fcNan);
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- const bool IsDenormalRHS = (OrigClass & fcSubnormal) == OrigClass;
-
- const bool IsInf = (OrigClass & fcInf) == OrigClass;
- if (IsInf) {
- FPClassTest Mask = fcAllFlags;
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ:
- case FCmpInst::FCMP_UNE: {
- // Match __builtin_isinf patterns
- //
- // fcmp oeq x, +inf -> is_fpclass x, fcPosInf
- // fcmp oeq fabs(x), +inf -> is_fpclass x, fcInf
- // fcmp oeq x, -inf -> is_fpclass x, fcNegInf
- // fcmp oeq fabs(x), -inf -> is_fpclass x, 0 -> false
- //
- // fcmp une x, +inf -> is_fpclass x, ~fcPosInf
- // fcmp une fabs(x), +inf -> is_fpclass x, ~fcInf
- // fcmp une x, -inf -> is_fpclass x, ~fcNegInf
- // fcmp une fabs(x), -inf -> is_fpclass x, fcAllFlags -> true
- if (IsNegativeRHS) {
- Mask = fcNegInf;
- if (IsFabs)
- Mask = fcNone;
- } else {
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- }
- break;
- }
- case FCmpInst::FCMP_ONE:
- case FCmpInst::FCMP_UEQ: {
- // Match __builtin_isinf patterns
- // fcmp one x, -inf -> is_fpclass x, fcNegInf
- // fcmp one fabs(x), -inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one x, +inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one fabs(x), +inf -> is_fpclass x, ~fcInf & fcNan
- //
- // fcmp ueq x, +inf -> is_fpclass x, fcPosInf|fcNan
- // fcmp ueq (fabs x), +inf -> is_fpclass x, fcInf|fcNan
- // fcmp ueq x, -inf -> is_fpclass x, fcNegInf|fcNan
- // fcmp ueq fabs(x), -inf -> is_fpclass x, fcNan
- if (IsNegativeRHS) {
- Mask = ~fcNegInf & ~fcNan;
- if (IsFabs)
- Mask = ~fcNan;
- } else {
- Mask = ~fcPosInf & ~fcNan;
- if (IsFabs)
- Mask &= ~fcNegInf;
- }
-
- break;
- }
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- if (IsNegativeRHS) {
- // No value is ordered and less than negative infinity.
- // All values are unordered with or at least negative infinity.
- // fcmp olt x, -inf -> false
- // fcmp uge x, -inf -> true
- Mask = fcNone;
- break;
- }
-
- // fcmp olt fabs(x), +inf -> fcFinite
- // fcmp uge fabs(x), +inf -> ~fcFinite
- // fcmp olt x, +inf -> fcFinite|fcNegInf
- // fcmp uge x, +inf -> ~(fcFinite|fcNegInf)
- Mask = fcFinite;
- if (!IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- if (IsNegativeRHS) {
- // fcmp oge x, -inf -> ~fcNan
- // fcmp oge fabs(x), -inf -> ~fcNan
- // fcmp ult x, -inf -> fcNan
- // fcmp ult fabs(x), -inf -> fcNan
- Mask = ~fcNan;
- break;
- }
-
- // fcmp oge fabs(x), +inf -> fcInf
- // fcmp oge x, +inf -> fcPosInf
- // fcmp ult fabs(x), +inf -> ~fcInf
- // fcmp ult x, +inf -> ~fcPosInf
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_ULE: {
- if (IsNegativeRHS) {
- // fcmp ogt x, -inf -> fcmp one x, -inf
- // fcmp ogt fabs(x), -inf -> fcmp ord x, x
- // fcmp ule x, -inf -> fcmp ueq x, -inf
- // fcmp ule fabs(x), -inf -> fcmp uno x, x
- Mask = IsFabs ? ~fcNan : ~(fcNegInf | fcNan);
- break;
- }
-
- // No value is ordered and greater than infinity.
- Mask = fcNone;
- break;
- }
- case FCmpInst::FCMP_OLE:
- case FCmpInst::FCMP_UGT: {
- if (IsNegativeRHS) {
- Mask = IsFabs ? fcNone : fcNegInf;
- break;
- }
-
- // fcmp ole x, +inf -> fcmp ord x, x
- // fcmp ole fabs(x), +inf -> fcmp ord x, x
- // fcmp ole x, -inf -> fcmp oeq x, -inf
- // fcmp ole fabs(x), -inf -> false
- Mask = ~fcNan;
- break;
- }
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- if (Pred == FCmpInst::FCMP_OEQ)
- return {Src, RHSClass, fcAllFlags};
-
- if (Pred == FCmpInst::FCMP_UEQ) {
- FPClassTest Class = RHSClass | fcNan;
- return {Src, Class, ~fcNan};
- }
-
- if (Pred == FCmpInst::FCMP_ONE)
- return {Src, ~fcNan, RHSClass | fcNan};
-
- if (Pred == FCmpInst::FCMP_UNE)
- return {Src, fcAllFlags, RHSClass};
-
- assert((RHSClass == fcNone || RHSClass == fcPosNormal ||
- RHSClass == fcNegNormal || RHSClass == fcNormal ||
- RHSClass == fcPosSubnormal || RHSClass == fcNegSubnormal ||
- RHSClass == fcSubnormal) &&
- "should have been recognized as an exact class test");
-
- if (IsNegativeRHS) {
- // TODO: Handle fneg(fabs)
- if (IsFabs) {
- // fabs(x) o> -k -> fcmp ord x, x
- // fabs(x) u> -k -> true
- // fabs(x) o< -k -> false
- // fabs(x) u< -k -> fcmp uno x, x
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ~fcNan, fcNan};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, fcAllFlags, fcNone};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, fcNone, fcAllFlags};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, fcNan, ~fcNan};
- default:
- break;
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- FPClassTest ClassesLE = fcNegInf | fcNegNormal;
- FPClassTest ClassesGE = fcPositive | fcNegZero | fcNegSubnormal;
-
- if (IsDenormalRHS)
- ClassesLE |= fcNegSubnormal;
- else
- ClassesGE |= fcNegNormal;
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- } else if (IsPositiveRHS) {
- FPClassTest ClassesGE = fcPosNormal | fcPosInf;
- FPClassTest ClassesLE = fcNegative | fcPosZero | fcPosSubnormal;
- if (IsDenormalRHS)
- ClassesGE |= fcPosSubnormal;
- else
- ClassesLE |= fcPosNormal;
-
- if (IsFabs) {
- ClassesGE = llvm::inverse_fabs(ClassesGE);
- ClassesLE = llvm::inverse_fabs(ClassesLE);
- }
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
- // We can refine checks against smallest normal / largest denormal to an
- // exact class test.
- if (!ConstRHS.isNegative() && ConstRHS.isSmallestNormalized()) {
- ValueRefT Src = LHS;
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
-
- FPClassTest Mask;
- // Match pattern that's used in __builtin_isnormal.
- switch (Pred) {
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- // fcmp olt x, smallest_normal ->
- // fcNegInf|fcNegNormal|fcSubnormal|fcZero fcmp olt fabs(x),
- // smallest_normal -> fcSubnormal|fcZero fcmp uge x, smallest_normal ->
- // fcNan|fcPosNormal|fcPosInf fcmp uge fabs(x), smallest_normal ->
- // ~(fcSubnormal|fcZero)
- Mask = fcZero | fcSubnormal;
- if (!IsFabs)
- Mask |= fcNegNormal | fcNegInf;
-
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- // fcmp oge x, smallest_normal -> fcPosNormal | fcPosInf
- // fcmp oge fabs(x), smallest_normal -> fcInf | fcNormal
- // fcmp ult x, smallest_normal -> ~(fcPosNormal | fcPosInf)
- // fcmp ult fabs(x), smallest_normal -> ~(fcInf | fcNormal)
- Mask = fcPosInf | fcPosNormal;
- if (IsFabs)
- Mask |= fcNegInf | fcNegNormal;
- break;
- }
- default:
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(),
- LookThroughSrc);
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(), LookThroughSrc);
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- // TODO: Just call computeKnownFPClass for RHS to handle non-constants.
- return fcmpImpliesClass(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-};
-
-} // namespace llvm
-
-#endif // LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
diff --git a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h b/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
deleted file mode 100644
index 96fdbf48d8b43..0000000000000
--- a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//===- llvm/Analysis/FloatingPointPredicateUtils.h ------------*- C++ -*---===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/GenericFloatingPointPredicateUtils.h"
-#include "llvm/IR/SSAContext.h"
-
-namespace llvm {
-
-using FloatingPointPredicateUtils =
- GenericFloatingPointPredicateUtils<SSAContext>;
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- Value *RHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, RHS,
- LookThroughSrc = true);
-}
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat *ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, *ConstRHS,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- FPClassTest RHSClass, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, RHSClass,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat &ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, Const...
[truncated]
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@llvm/pr-subscribers-llvm-transforms Author: Tim Gymnich (tgymnich) ChangesPatch is 48.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/141258.diff 14 Files Affected:
diff --git a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h b/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
deleted file mode 100644
index 49c5fe0aed6e1..0000000000000
--- a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,479 +0,0 @@
-//===- llvm/Support/GenericFloatingPointPredicateUtils.h -----*- C++-*-----===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// Utilities for dealing with flags related to floating point properties and
-/// mode controls.
-///
-//===----------------------------------------------------------------------===/
-
-#ifndef LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/FloatingPointMode.h"
-#include "llvm/IR/Instructions.h"
-#include <optional>
-
-namespace llvm {
-
-template <typename ContextT> class GenericFloatingPointPredicateUtils {
- using ValueRefT = typename ContextT::ValueRefT;
- using FunctionT = typename ContextT::FunctionT;
-
- constexpr static ValueRefT Invalid = {};
-
-private:
- static DenormalMode queryDenormalMode(const FunctionT &F, ValueRefT Val);
-
- static bool lookThroughFAbs(const FunctionT &F, ValueRefT LHS,
- ValueRefT &Src);
-
- static std::optional<APFloat> matchConstantFloat(const FunctionT &F,
- ValueRefT Val);
-
- /// Return the return value for fcmpImpliesClass for a compare that produces
- /// an exact class test.
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- exactClass(ValueRefT V, FPClassTest M) {
- return {V, M, ~M};
- }
-
-public:
- /// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
- /// same result as an fcmp with the given operands.
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags};
-
- return fcmpToClassTest(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
-
- auto [Src, ClassIfTrue, ClassIfFalse] =
- fcmpImpliesClass(Pred, F, LHS, ConstRHS, LookThroughSrc);
-
- if (Src && ClassIfTrue == ~ClassIfFalse)
- return {Src, ClassIfTrue};
-
- return {Invalid, fcAllFlags};
- }
-
- /// Compute the possible floating-point classes that \p LHS could be based on
- /// fcmp \Pred \p LHS, \p RHS.
- ///
- /// \returns { TestedValue, ClassesIfTrue, ClassesIfFalse }
- ///
- /// If the compare returns an exact class test, ClassesIfTrue ==
- /// ~ClassesIfFalse
- ///
- /// This is a less exact version of fcmpToClassTest (e.g. fcmpToClassTest will
- /// only succeed for a test of x > 0 implies positive, but not x > 1).
- ///
- /// If \p LookThroughSrc is true, consider the input value when computing the
- /// mask. This may look through sign bit operations.
- ///
- /// If \p LookThroughSrc is false, ignore the source value (i.e. the first
- /// pair element will always be LHS.
- ///
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- FPClassTest RHSClass, bool LookThroughSrc) {
- assert(RHSClass != fcNone);
- ValueRefT Src = LHS;
-
- if (Pred == FCmpInst::FCMP_TRUE)
- return exactClass(Src, fcAllFlags);
-
- if (Pred == FCmpInst::FCMP_FALSE)
- return exactClass(Src, fcNone);
-
- const FPClassTest OrigClass = RHSClass;
-
- const bool IsNegativeRHS = (RHSClass & fcNegative) == RHSClass;
- const bool IsPositiveRHS = (RHSClass & fcPositive) == RHSClass;
- const bool IsNaN = (RHSClass & ~fcNan) == fcNone;
-
- if (IsNaN) {
- // fcmp o__ x, nan -> false
- // fcmp u__ x, nan -> true
- return exactClass(Src, CmpInst::isOrdered(Pred) ? fcNone : fcAllFlags);
- }
-
- // fcmp ord x, zero|normal|subnormal|inf -> ~fcNan
- if (Pred == FCmpInst::FCMP_ORD)
- return exactClass(Src, ~fcNan);
-
- // fcmp uno x, zero|normal|subnormal|inf -> fcNan
- if (Pred == FCmpInst::FCMP_UNO)
- return exactClass(Src, fcNan);
-
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
- if (IsFabs)
- RHSClass = llvm::inverse_fabs(RHSClass);
-
- const bool IsZero = (OrigClass & fcZero) == OrigClass;
- if (IsZero) {
- assert(Pred != FCmpInst::FCMP_ORD && Pred != FCmpInst::FCMP_UNO);
- // Compares with fcNone are only exactly equal to fcZero if input
- // denormals are not flushed.
- // TODO: Handle DAZ by expanding masks to cover subnormal cases.
- DenormalMode Mode = queryDenormalMode(F, LHS);
- if (Mode.Input != DenormalMode::IEEE)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ: // Match x == 0.0
- return exactClass(Src, fcZero);
- case FCmpInst::FCMP_UEQ: // Match isnan(x) || (x == 0.0)
- return exactClass(Src, fcZero | fcNan);
- case FCmpInst::FCMP_UNE: // Match (x != 0.0)
- return exactClass(Src, ~fcZero);
- case FCmpInst::FCMP_ONE: // Match !isnan(x) && x != 0.0
- return exactClass(Src, ~fcNan & ~fcZero);
- case FCmpInst::FCMP_ORD:
- // Canonical form of ord/uno is with a zero. We could also handle
- // non-canonical other non-NaN constants or LHS == RHS.
- return exactClass(Src, ~fcNan);
- case FCmpInst::FCMP_UNO:
- return exactClass(Src, fcNan);
- case FCmpInst::FCMP_OGT: // x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf);
- case FCmpInst::FCMP_UGT: // isnan(x) || x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf | fcNan);
- case FCmpInst::FCMP_OGE: // x >= 0
- return exactClass(Src, fcPositive | fcNegZero);
- case FCmpInst::FCMP_UGE: // isnan(x) || x >= 0
- return exactClass(Src, fcPositive | fcNegZero | fcNan);
- case FCmpInst::FCMP_OLT: // x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf);
- case FCmpInst::FCMP_ULT: // isnan(x) || x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf | fcNan);
- case FCmpInst::FCMP_OLE: // x <= 0
- return exactClass(Src, fcNegative | fcPosZero);
- case FCmpInst::FCMP_ULE: // isnan(x) || x <= 0
- return exactClass(Src, fcNegative | fcPosZero | fcNan);
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- const bool IsDenormalRHS = (OrigClass & fcSubnormal) == OrigClass;
-
- const bool IsInf = (OrigClass & fcInf) == OrigClass;
- if (IsInf) {
- FPClassTest Mask = fcAllFlags;
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ:
- case FCmpInst::FCMP_UNE: {
- // Match __builtin_isinf patterns
- //
- // fcmp oeq x, +inf -> is_fpclass x, fcPosInf
- // fcmp oeq fabs(x), +inf -> is_fpclass x, fcInf
- // fcmp oeq x, -inf -> is_fpclass x, fcNegInf
- // fcmp oeq fabs(x), -inf -> is_fpclass x, 0 -> false
- //
- // fcmp une x, +inf -> is_fpclass x, ~fcPosInf
- // fcmp une fabs(x), +inf -> is_fpclass x, ~fcInf
- // fcmp une x, -inf -> is_fpclass x, ~fcNegInf
- // fcmp une fabs(x), -inf -> is_fpclass x, fcAllFlags -> true
- if (IsNegativeRHS) {
- Mask = fcNegInf;
- if (IsFabs)
- Mask = fcNone;
- } else {
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- }
- break;
- }
- case FCmpInst::FCMP_ONE:
- case FCmpInst::FCMP_UEQ: {
- // Match __builtin_isinf patterns
- // fcmp one x, -inf -> is_fpclass x, fcNegInf
- // fcmp one fabs(x), -inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one x, +inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one fabs(x), +inf -> is_fpclass x, ~fcInf & fcNan
- //
- // fcmp ueq x, +inf -> is_fpclass x, fcPosInf|fcNan
- // fcmp ueq (fabs x), +inf -> is_fpclass x, fcInf|fcNan
- // fcmp ueq x, -inf -> is_fpclass x, fcNegInf|fcNan
- // fcmp ueq fabs(x), -inf -> is_fpclass x, fcNan
- if (IsNegativeRHS) {
- Mask = ~fcNegInf & ~fcNan;
- if (IsFabs)
- Mask = ~fcNan;
- } else {
- Mask = ~fcPosInf & ~fcNan;
- if (IsFabs)
- Mask &= ~fcNegInf;
- }
-
- break;
- }
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- if (IsNegativeRHS) {
- // No value is ordered and less than negative infinity.
- // All values are unordered with or at least negative infinity.
- // fcmp olt x, -inf -> false
- // fcmp uge x, -inf -> true
- Mask = fcNone;
- break;
- }
-
- // fcmp olt fabs(x), +inf -> fcFinite
- // fcmp uge fabs(x), +inf -> ~fcFinite
- // fcmp olt x, +inf -> fcFinite|fcNegInf
- // fcmp uge x, +inf -> ~(fcFinite|fcNegInf)
- Mask = fcFinite;
- if (!IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- if (IsNegativeRHS) {
- // fcmp oge x, -inf -> ~fcNan
- // fcmp oge fabs(x), -inf -> ~fcNan
- // fcmp ult x, -inf -> fcNan
- // fcmp ult fabs(x), -inf -> fcNan
- Mask = ~fcNan;
- break;
- }
-
- // fcmp oge fabs(x), +inf -> fcInf
- // fcmp oge x, +inf -> fcPosInf
- // fcmp ult fabs(x), +inf -> ~fcInf
- // fcmp ult x, +inf -> ~fcPosInf
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_ULE: {
- if (IsNegativeRHS) {
- // fcmp ogt x, -inf -> fcmp one x, -inf
- // fcmp ogt fabs(x), -inf -> fcmp ord x, x
- // fcmp ule x, -inf -> fcmp ueq x, -inf
- // fcmp ule fabs(x), -inf -> fcmp uno x, x
- Mask = IsFabs ? ~fcNan : ~(fcNegInf | fcNan);
- break;
- }
-
- // No value is ordered and greater than infinity.
- Mask = fcNone;
- break;
- }
- case FCmpInst::FCMP_OLE:
- case FCmpInst::FCMP_UGT: {
- if (IsNegativeRHS) {
- Mask = IsFabs ? fcNone : fcNegInf;
- break;
- }
-
- // fcmp ole x, +inf -> fcmp ord x, x
- // fcmp ole fabs(x), +inf -> fcmp ord x, x
- // fcmp ole x, -inf -> fcmp oeq x, -inf
- // fcmp ole fabs(x), -inf -> false
- Mask = ~fcNan;
- break;
- }
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- if (Pred == FCmpInst::FCMP_OEQ)
- return {Src, RHSClass, fcAllFlags};
-
- if (Pred == FCmpInst::FCMP_UEQ) {
- FPClassTest Class = RHSClass | fcNan;
- return {Src, Class, ~fcNan};
- }
-
- if (Pred == FCmpInst::FCMP_ONE)
- return {Src, ~fcNan, RHSClass | fcNan};
-
- if (Pred == FCmpInst::FCMP_UNE)
- return {Src, fcAllFlags, RHSClass};
-
- assert((RHSClass == fcNone || RHSClass == fcPosNormal ||
- RHSClass == fcNegNormal || RHSClass == fcNormal ||
- RHSClass == fcPosSubnormal || RHSClass == fcNegSubnormal ||
- RHSClass == fcSubnormal) &&
- "should have been recognized as an exact class test");
-
- if (IsNegativeRHS) {
- // TODO: Handle fneg(fabs)
- if (IsFabs) {
- // fabs(x) o> -k -> fcmp ord x, x
- // fabs(x) u> -k -> true
- // fabs(x) o< -k -> false
- // fabs(x) u< -k -> fcmp uno x, x
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ~fcNan, fcNan};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, fcAllFlags, fcNone};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, fcNone, fcAllFlags};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, fcNan, ~fcNan};
- default:
- break;
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- FPClassTest ClassesLE = fcNegInf | fcNegNormal;
- FPClassTest ClassesGE = fcPositive | fcNegZero | fcNegSubnormal;
-
- if (IsDenormalRHS)
- ClassesLE |= fcNegSubnormal;
- else
- ClassesGE |= fcNegNormal;
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- } else if (IsPositiveRHS) {
- FPClassTest ClassesGE = fcPosNormal | fcPosInf;
- FPClassTest ClassesLE = fcNegative | fcPosZero | fcPosSubnormal;
- if (IsDenormalRHS)
- ClassesGE |= fcPosSubnormal;
- else
- ClassesLE |= fcPosNormal;
-
- if (IsFabs) {
- ClassesGE = llvm::inverse_fabs(ClassesGE);
- ClassesLE = llvm::inverse_fabs(ClassesLE);
- }
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
- // We can refine checks against smallest normal / largest denormal to an
- // exact class test.
- if (!ConstRHS.isNegative() && ConstRHS.isSmallestNormalized()) {
- ValueRefT Src = LHS;
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
-
- FPClassTest Mask;
- // Match pattern that's used in __builtin_isnormal.
- switch (Pred) {
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- // fcmp olt x, smallest_normal ->
- // fcNegInf|fcNegNormal|fcSubnormal|fcZero fcmp olt fabs(x),
- // smallest_normal -> fcSubnormal|fcZero fcmp uge x, smallest_normal ->
- // fcNan|fcPosNormal|fcPosInf fcmp uge fabs(x), smallest_normal ->
- // ~(fcSubnormal|fcZero)
- Mask = fcZero | fcSubnormal;
- if (!IsFabs)
- Mask |= fcNegNormal | fcNegInf;
-
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- // fcmp oge x, smallest_normal -> fcPosNormal | fcPosInf
- // fcmp oge fabs(x), smallest_normal -> fcInf | fcNormal
- // fcmp ult x, smallest_normal -> ~(fcPosNormal | fcPosInf)
- // fcmp ult fabs(x), smallest_normal -> ~(fcInf | fcNormal)
- Mask = fcPosInf | fcPosNormal;
- if (IsFabs)
- Mask |= fcNegInf | fcNegNormal;
- break;
- }
- default:
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(),
- LookThroughSrc);
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(), LookThroughSrc);
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- // TODO: Just call computeKnownFPClass for RHS to handle non-constants.
- return fcmpImpliesClass(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-};
-
-} // namespace llvm
-
-#endif // LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
diff --git a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h b/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
deleted file mode 100644
index 96fdbf48d8b43..0000000000000
--- a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//===- llvm/Analysis/FloatingPointPredicateUtils.h ------------*- C++ -*---===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/GenericFloatingPointPredicateUtils.h"
-#include "llvm/IR/SSAContext.h"
-
-namespace llvm {
-
-using FloatingPointPredicateUtils =
- GenericFloatingPointPredicateUtils<SSAContext>;
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- Value *RHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, RHS,
- LookThroughSrc = true);
-}
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat *ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, *ConstRHS,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- FPClassTest RHSClass, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, RHSClass,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat &ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, Const...
[truncated]
|
|
@llvm/pr-subscribers-llvm-analysis Author: Tim Gymnich (tgymnich) ChangesPatch is 48.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/141258.diff 14 Files Affected:
diff --git a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h b/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
deleted file mode 100644
index 49c5fe0aed6e1..0000000000000
--- a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,479 +0,0 @@
-//===- llvm/Support/GenericFloatingPointPredicateUtils.h -----*- C++-*-----===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// Utilities for dealing with flags related to floating point properties and
-/// mode controls.
-///
-//===----------------------------------------------------------------------===/
-
-#ifndef LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/FloatingPointMode.h"
-#include "llvm/IR/Instructions.h"
-#include <optional>
-
-namespace llvm {
-
-template <typename ContextT> class GenericFloatingPointPredicateUtils {
- using ValueRefT = typename ContextT::ValueRefT;
- using FunctionT = typename ContextT::FunctionT;
-
- constexpr static ValueRefT Invalid = {};
-
-private:
- static DenormalMode queryDenormalMode(const FunctionT &F, ValueRefT Val);
-
- static bool lookThroughFAbs(const FunctionT &F, ValueRefT LHS,
- ValueRefT &Src);
-
- static std::optional<APFloat> matchConstantFloat(const FunctionT &F,
- ValueRefT Val);
-
- /// Return the return value for fcmpImpliesClass for a compare that produces
- /// an exact class test.
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- exactClass(ValueRefT V, FPClassTest M) {
- return {V, M, ~M};
- }
-
-public:
- /// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
- /// same result as an fcmp with the given operands.
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags};
-
- return fcmpToClassTest(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
-
- auto [Src, ClassIfTrue, ClassIfFalse] =
- fcmpImpliesClass(Pred, F, LHS, ConstRHS, LookThroughSrc);
-
- if (Src && ClassIfTrue == ~ClassIfFalse)
- return {Src, ClassIfTrue};
-
- return {Invalid, fcAllFlags};
- }
-
- /// Compute the possible floating-point classes that \p LHS could be based on
- /// fcmp \Pred \p LHS, \p RHS.
- ///
- /// \returns { TestedValue, ClassesIfTrue, ClassesIfFalse }
- ///
- /// If the compare returns an exact class test, ClassesIfTrue ==
- /// ~ClassesIfFalse
- ///
- /// This is a less exact version of fcmpToClassTest (e.g. fcmpToClassTest will
- /// only succeed for a test of x > 0 implies positive, but not x > 1).
- ///
- /// If \p LookThroughSrc is true, consider the input value when computing the
- /// mask. This may look through sign bit operations.
- ///
- /// If \p LookThroughSrc is false, ignore the source value (i.e. the first
- /// pair element will always be LHS.
- ///
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- FPClassTest RHSClass, bool LookThroughSrc) {
- assert(RHSClass != fcNone);
- ValueRefT Src = LHS;
-
- if (Pred == FCmpInst::FCMP_TRUE)
- return exactClass(Src, fcAllFlags);
-
- if (Pred == FCmpInst::FCMP_FALSE)
- return exactClass(Src, fcNone);
-
- const FPClassTest OrigClass = RHSClass;
-
- const bool IsNegativeRHS = (RHSClass & fcNegative) == RHSClass;
- const bool IsPositiveRHS = (RHSClass & fcPositive) == RHSClass;
- const bool IsNaN = (RHSClass & ~fcNan) == fcNone;
-
- if (IsNaN) {
- // fcmp o__ x, nan -> false
- // fcmp u__ x, nan -> true
- return exactClass(Src, CmpInst::isOrdered(Pred) ? fcNone : fcAllFlags);
- }
-
- // fcmp ord x, zero|normal|subnormal|inf -> ~fcNan
- if (Pred == FCmpInst::FCMP_ORD)
- return exactClass(Src, ~fcNan);
-
- // fcmp uno x, zero|normal|subnormal|inf -> fcNan
- if (Pred == FCmpInst::FCMP_UNO)
- return exactClass(Src, fcNan);
-
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
- if (IsFabs)
- RHSClass = llvm::inverse_fabs(RHSClass);
-
- const bool IsZero = (OrigClass & fcZero) == OrigClass;
- if (IsZero) {
- assert(Pred != FCmpInst::FCMP_ORD && Pred != FCmpInst::FCMP_UNO);
- // Compares with fcNone are only exactly equal to fcZero if input
- // denormals are not flushed.
- // TODO: Handle DAZ by expanding masks to cover subnormal cases.
- DenormalMode Mode = queryDenormalMode(F, LHS);
- if (Mode.Input != DenormalMode::IEEE)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ: // Match x == 0.0
- return exactClass(Src, fcZero);
- case FCmpInst::FCMP_UEQ: // Match isnan(x) || (x == 0.0)
- return exactClass(Src, fcZero | fcNan);
- case FCmpInst::FCMP_UNE: // Match (x != 0.0)
- return exactClass(Src, ~fcZero);
- case FCmpInst::FCMP_ONE: // Match !isnan(x) && x != 0.0
- return exactClass(Src, ~fcNan & ~fcZero);
- case FCmpInst::FCMP_ORD:
- // Canonical form of ord/uno is with a zero. We could also handle
- // non-canonical other non-NaN constants or LHS == RHS.
- return exactClass(Src, ~fcNan);
- case FCmpInst::FCMP_UNO:
- return exactClass(Src, fcNan);
- case FCmpInst::FCMP_OGT: // x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf);
- case FCmpInst::FCMP_UGT: // isnan(x) || x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf | fcNan);
- case FCmpInst::FCMP_OGE: // x >= 0
- return exactClass(Src, fcPositive | fcNegZero);
- case FCmpInst::FCMP_UGE: // isnan(x) || x >= 0
- return exactClass(Src, fcPositive | fcNegZero | fcNan);
- case FCmpInst::FCMP_OLT: // x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf);
- case FCmpInst::FCMP_ULT: // isnan(x) || x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf | fcNan);
- case FCmpInst::FCMP_OLE: // x <= 0
- return exactClass(Src, fcNegative | fcPosZero);
- case FCmpInst::FCMP_ULE: // isnan(x) || x <= 0
- return exactClass(Src, fcNegative | fcPosZero | fcNan);
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- const bool IsDenormalRHS = (OrigClass & fcSubnormal) == OrigClass;
-
- const bool IsInf = (OrigClass & fcInf) == OrigClass;
- if (IsInf) {
- FPClassTest Mask = fcAllFlags;
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ:
- case FCmpInst::FCMP_UNE: {
- // Match __builtin_isinf patterns
- //
- // fcmp oeq x, +inf -> is_fpclass x, fcPosInf
- // fcmp oeq fabs(x), +inf -> is_fpclass x, fcInf
- // fcmp oeq x, -inf -> is_fpclass x, fcNegInf
- // fcmp oeq fabs(x), -inf -> is_fpclass x, 0 -> false
- //
- // fcmp une x, +inf -> is_fpclass x, ~fcPosInf
- // fcmp une fabs(x), +inf -> is_fpclass x, ~fcInf
- // fcmp une x, -inf -> is_fpclass x, ~fcNegInf
- // fcmp une fabs(x), -inf -> is_fpclass x, fcAllFlags -> true
- if (IsNegativeRHS) {
- Mask = fcNegInf;
- if (IsFabs)
- Mask = fcNone;
- } else {
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- }
- break;
- }
- case FCmpInst::FCMP_ONE:
- case FCmpInst::FCMP_UEQ: {
- // Match __builtin_isinf patterns
- // fcmp one x, -inf -> is_fpclass x, fcNegInf
- // fcmp one fabs(x), -inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one x, +inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one fabs(x), +inf -> is_fpclass x, ~fcInf & fcNan
- //
- // fcmp ueq x, +inf -> is_fpclass x, fcPosInf|fcNan
- // fcmp ueq (fabs x), +inf -> is_fpclass x, fcInf|fcNan
- // fcmp ueq x, -inf -> is_fpclass x, fcNegInf|fcNan
- // fcmp ueq fabs(x), -inf -> is_fpclass x, fcNan
- if (IsNegativeRHS) {
- Mask = ~fcNegInf & ~fcNan;
- if (IsFabs)
- Mask = ~fcNan;
- } else {
- Mask = ~fcPosInf & ~fcNan;
- if (IsFabs)
- Mask &= ~fcNegInf;
- }
-
- break;
- }
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- if (IsNegativeRHS) {
- // No value is ordered and less than negative infinity.
- // All values are unordered with or at least negative infinity.
- // fcmp olt x, -inf -> false
- // fcmp uge x, -inf -> true
- Mask = fcNone;
- break;
- }
-
- // fcmp olt fabs(x), +inf -> fcFinite
- // fcmp uge fabs(x), +inf -> ~fcFinite
- // fcmp olt x, +inf -> fcFinite|fcNegInf
- // fcmp uge x, +inf -> ~(fcFinite|fcNegInf)
- Mask = fcFinite;
- if (!IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- if (IsNegativeRHS) {
- // fcmp oge x, -inf -> ~fcNan
- // fcmp oge fabs(x), -inf -> ~fcNan
- // fcmp ult x, -inf -> fcNan
- // fcmp ult fabs(x), -inf -> fcNan
- Mask = ~fcNan;
- break;
- }
-
- // fcmp oge fabs(x), +inf -> fcInf
- // fcmp oge x, +inf -> fcPosInf
- // fcmp ult fabs(x), +inf -> ~fcInf
- // fcmp ult x, +inf -> ~fcPosInf
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_ULE: {
- if (IsNegativeRHS) {
- // fcmp ogt x, -inf -> fcmp one x, -inf
- // fcmp ogt fabs(x), -inf -> fcmp ord x, x
- // fcmp ule x, -inf -> fcmp ueq x, -inf
- // fcmp ule fabs(x), -inf -> fcmp uno x, x
- Mask = IsFabs ? ~fcNan : ~(fcNegInf | fcNan);
- break;
- }
-
- // No value is ordered and greater than infinity.
- Mask = fcNone;
- break;
- }
- case FCmpInst::FCMP_OLE:
- case FCmpInst::FCMP_UGT: {
- if (IsNegativeRHS) {
- Mask = IsFabs ? fcNone : fcNegInf;
- break;
- }
-
- // fcmp ole x, +inf -> fcmp ord x, x
- // fcmp ole fabs(x), +inf -> fcmp ord x, x
- // fcmp ole x, -inf -> fcmp oeq x, -inf
- // fcmp ole fabs(x), -inf -> false
- Mask = ~fcNan;
- break;
- }
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- if (Pred == FCmpInst::FCMP_OEQ)
- return {Src, RHSClass, fcAllFlags};
-
- if (Pred == FCmpInst::FCMP_UEQ) {
- FPClassTest Class = RHSClass | fcNan;
- return {Src, Class, ~fcNan};
- }
-
- if (Pred == FCmpInst::FCMP_ONE)
- return {Src, ~fcNan, RHSClass | fcNan};
-
- if (Pred == FCmpInst::FCMP_UNE)
- return {Src, fcAllFlags, RHSClass};
-
- assert((RHSClass == fcNone || RHSClass == fcPosNormal ||
- RHSClass == fcNegNormal || RHSClass == fcNormal ||
- RHSClass == fcPosSubnormal || RHSClass == fcNegSubnormal ||
- RHSClass == fcSubnormal) &&
- "should have been recognized as an exact class test");
-
- if (IsNegativeRHS) {
- // TODO: Handle fneg(fabs)
- if (IsFabs) {
- // fabs(x) o> -k -> fcmp ord x, x
- // fabs(x) u> -k -> true
- // fabs(x) o< -k -> false
- // fabs(x) u< -k -> fcmp uno x, x
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ~fcNan, fcNan};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, fcAllFlags, fcNone};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, fcNone, fcAllFlags};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, fcNan, ~fcNan};
- default:
- break;
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- FPClassTest ClassesLE = fcNegInf | fcNegNormal;
- FPClassTest ClassesGE = fcPositive | fcNegZero | fcNegSubnormal;
-
- if (IsDenormalRHS)
- ClassesLE |= fcNegSubnormal;
- else
- ClassesGE |= fcNegNormal;
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- } else if (IsPositiveRHS) {
- FPClassTest ClassesGE = fcPosNormal | fcPosInf;
- FPClassTest ClassesLE = fcNegative | fcPosZero | fcPosSubnormal;
- if (IsDenormalRHS)
- ClassesGE |= fcPosSubnormal;
- else
- ClassesLE |= fcPosNormal;
-
- if (IsFabs) {
- ClassesGE = llvm::inverse_fabs(ClassesGE);
- ClassesLE = llvm::inverse_fabs(ClassesLE);
- }
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
- // We can refine checks against smallest normal / largest denormal to an
- // exact class test.
- if (!ConstRHS.isNegative() && ConstRHS.isSmallestNormalized()) {
- ValueRefT Src = LHS;
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
-
- FPClassTest Mask;
- // Match pattern that's used in __builtin_isnormal.
- switch (Pred) {
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- // fcmp olt x, smallest_normal ->
- // fcNegInf|fcNegNormal|fcSubnormal|fcZero fcmp olt fabs(x),
- // smallest_normal -> fcSubnormal|fcZero fcmp uge x, smallest_normal ->
- // fcNan|fcPosNormal|fcPosInf fcmp uge fabs(x), smallest_normal ->
- // ~(fcSubnormal|fcZero)
- Mask = fcZero | fcSubnormal;
- if (!IsFabs)
- Mask |= fcNegNormal | fcNegInf;
-
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- // fcmp oge x, smallest_normal -> fcPosNormal | fcPosInf
- // fcmp oge fabs(x), smallest_normal -> fcInf | fcNormal
- // fcmp ult x, smallest_normal -> ~(fcPosNormal | fcPosInf)
- // fcmp ult fabs(x), smallest_normal -> ~(fcInf | fcNormal)
- Mask = fcPosInf | fcPosNormal;
- if (IsFabs)
- Mask |= fcNegInf | fcNegNormal;
- break;
- }
- default:
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(),
- LookThroughSrc);
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(), LookThroughSrc);
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- // TODO: Just call computeKnownFPClass for RHS to handle non-constants.
- return fcmpImpliesClass(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-};
-
-} // namespace llvm
-
-#endif // LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
diff --git a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h b/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
deleted file mode 100644
index 96fdbf48d8b43..0000000000000
--- a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//===- llvm/Analysis/FloatingPointPredicateUtils.h ------------*- C++ -*---===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/GenericFloatingPointPredicateUtils.h"
-#include "llvm/IR/SSAContext.h"
-
-namespace llvm {
-
-using FloatingPointPredicateUtils =
- GenericFloatingPointPredicateUtils<SSAContext>;
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- Value *RHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, RHS,
- LookThroughSrc = true);
-}
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat *ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, *ConstRHS,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- FPClassTest RHSClass, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, RHSClass,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat &ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, Const...
[truncated]
|
|
@llvm/pr-subscribers-llvm-globalisel Author: Tim Gymnich (tgymnich) ChangesPatch is 48.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/141258.diff 14 Files Affected:
diff --git a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h b/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
deleted file mode 100644
index 49c5fe0aed6e1..0000000000000
--- a/llvm/include/llvm/ADT/GenericFloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,479 +0,0 @@
-//===- llvm/Support/GenericFloatingPointPredicateUtils.h -----*- C++-*-----===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// Utilities for dealing with flags related to floating point properties and
-/// mode controls.
-///
-//===----------------------------------------------------------------------===/
-
-#ifndef LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/FloatingPointMode.h"
-#include "llvm/IR/Instructions.h"
-#include <optional>
-
-namespace llvm {
-
-template <typename ContextT> class GenericFloatingPointPredicateUtils {
- using ValueRefT = typename ContextT::ValueRefT;
- using FunctionT = typename ContextT::FunctionT;
-
- constexpr static ValueRefT Invalid = {};
-
-private:
- static DenormalMode queryDenormalMode(const FunctionT &F, ValueRefT Val);
-
- static bool lookThroughFAbs(const FunctionT &F, ValueRefT LHS,
- ValueRefT &Src);
-
- static std::optional<APFloat> matchConstantFloat(const FunctionT &F,
- ValueRefT Val);
-
- /// Return the return value for fcmpImpliesClass for a compare that produces
- /// an exact class test.
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- exactClass(ValueRefT V, FPClassTest M) {
- return {V, M, ~M};
- }
-
-public:
- /// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
- /// same result as an fcmp with the given operands.
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags};
-
- return fcmpToClassTest(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-
- static std::pair<ValueRefT, FPClassTest>
- fcmpToClassTest(FCmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
-
- auto [Src, ClassIfTrue, ClassIfFalse] =
- fcmpImpliesClass(Pred, F, LHS, ConstRHS, LookThroughSrc);
-
- if (Src && ClassIfTrue == ~ClassIfFalse)
- return {Src, ClassIfTrue};
-
- return {Invalid, fcAllFlags};
- }
-
- /// Compute the possible floating-point classes that \p LHS could be based on
- /// fcmp \Pred \p LHS, \p RHS.
- ///
- /// \returns { TestedValue, ClassesIfTrue, ClassesIfFalse }
- ///
- /// If the compare returns an exact class test, ClassesIfTrue ==
- /// ~ClassesIfFalse
- ///
- /// This is a less exact version of fcmpToClassTest (e.g. fcmpToClassTest will
- /// only succeed for a test of x > 0 implies positive, but not x > 1).
- ///
- /// If \p LookThroughSrc is true, consider the input value when computing the
- /// mask. This may look through sign bit operations.
- ///
- /// If \p LookThroughSrc is false, ignore the source value (i.e. the first
- /// pair element will always be LHS.
- ///
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- FPClassTest RHSClass, bool LookThroughSrc) {
- assert(RHSClass != fcNone);
- ValueRefT Src = LHS;
-
- if (Pred == FCmpInst::FCMP_TRUE)
- return exactClass(Src, fcAllFlags);
-
- if (Pred == FCmpInst::FCMP_FALSE)
- return exactClass(Src, fcNone);
-
- const FPClassTest OrigClass = RHSClass;
-
- const bool IsNegativeRHS = (RHSClass & fcNegative) == RHSClass;
- const bool IsPositiveRHS = (RHSClass & fcPositive) == RHSClass;
- const bool IsNaN = (RHSClass & ~fcNan) == fcNone;
-
- if (IsNaN) {
- // fcmp o__ x, nan -> false
- // fcmp u__ x, nan -> true
- return exactClass(Src, CmpInst::isOrdered(Pred) ? fcNone : fcAllFlags);
- }
-
- // fcmp ord x, zero|normal|subnormal|inf -> ~fcNan
- if (Pred == FCmpInst::FCMP_ORD)
- return exactClass(Src, ~fcNan);
-
- // fcmp uno x, zero|normal|subnormal|inf -> fcNan
- if (Pred == FCmpInst::FCMP_UNO)
- return exactClass(Src, fcNan);
-
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
- if (IsFabs)
- RHSClass = llvm::inverse_fabs(RHSClass);
-
- const bool IsZero = (OrigClass & fcZero) == OrigClass;
- if (IsZero) {
- assert(Pred != FCmpInst::FCMP_ORD && Pred != FCmpInst::FCMP_UNO);
- // Compares with fcNone are only exactly equal to fcZero if input
- // denormals are not flushed.
- // TODO: Handle DAZ by expanding masks to cover subnormal cases.
- DenormalMode Mode = queryDenormalMode(F, LHS);
- if (Mode.Input != DenormalMode::IEEE)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ: // Match x == 0.0
- return exactClass(Src, fcZero);
- case FCmpInst::FCMP_UEQ: // Match isnan(x) || (x == 0.0)
- return exactClass(Src, fcZero | fcNan);
- case FCmpInst::FCMP_UNE: // Match (x != 0.0)
- return exactClass(Src, ~fcZero);
- case FCmpInst::FCMP_ONE: // Match !isnan(x) && x != 0.0
- return exactClass(Src, ~fcNan & ~fcZero);
- case FCmpInst::FCMP_ORD:
- // Canonical form of ord/uno is with a zero. We could also handle
- // non-canonical other non-NaN constants or LHS == RHS.
- return exactClass(Src, ~fcNan);
- case FCmpInst::FCMP_UNO:
- return exactClass(Src, fcNan);
- case FCmpInst::FCMP_OGT: // x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf);
- case FCmpInst::FCMP_UGT: // isnan(x) || x > 0
- return exactClass(Src, fcPosSubnormal | fcPosNormal | fcPosInf | fcNan);
- case FCmpInst::FCMP_OGE: // x >= 0
- return exactClass(Src, fcPositive | fcNegZero);
- case FCmpInst::FCMP_UGE: // isnan(x) || x >= 0
- return exactClass(Src, fcPositive | fcNegZero | fcNan);
- case FCmpInst::FCMP_OLT: // x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf);
- case FCmpInst::FCMP_ULT: // isnan(x) || x < 0
- return exactClass(Src, fcNegSubnormal | fcNegNormal | fcNegInf | fcNan);
- case FCmpInst::FCMP_OLE: // x <= 0
- return exactClass(Src, fcNegative | fcPosZero);
- case FCmpInst::FCMP_ULE: // isnan(x) || x <= 0
- return exactClass(Src, fcNegative | fcPosZero | fcNan);
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- const bool IsDenormalRHS = (OrigClass & fcSubnormal) == OrigClass;
-
- const bool IsInf = (OrigClass & fcInf) == OrigClass;
- if (IsInf) {
- FPClassTest Mask = fcAllFlags;
-
- switch (Pred) {
- case FCmpInst::FCMP_OEQ:
- case FCmpInst::FCMP_UNE: {
- // Match __builtin_isinf patterns
- //
- // fcmp oeq x, +inf -> is_fpclass x, fcPosInf
- // fcmp oeq fabs(x), +inf -> is_fpclass x, fcInf
- // fcmp oeq x, -inf -> is_fpclass x, fcNegInf
- // fcmp oeq fabs(x), -inf -> is_fpclass x, 0 -> false
- //
- // fcmp une x, +inf -> is_fpclass x, ~fcPosInf
- // fcmp une fabs(x), +inf -> is_fpclass x, ~fcInf
- // fcmp une x, -inf -> is_fpclass x, ~fcNegInf
- // fcmp une fabs(x), -inf -> is_fpclass x, fcAllFlags -> true
- if (IsNegativeRHS) {
- Mask = fcNegInf;
- if (IsFabs)
- Mask = fcNone;
- } else {
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- }
- break;
- }
- case FCmpInst::FCMP_ONE:
- case FCmpInst::FCMP_UEQ: {
- // Match __builtin_isinf patterns
- // fcmp one x, -inf -> is_fpclass x, fcNegInf
- // fcmp one fabs(x), -inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one x, +inf -> is_fpclass x, ~fcNegInf & ~fcNan
- // fcmp one fabs(x), +inf -> is_fpclass x, ~fcInf & fcNan
- //
- // fcmp ueq x, +inf -> is_fpclass x, fcPosInf|fcNan
- // fcmp ueq (fabs x), +inf -> is_fpclass x, fcInf|fcNan
- // fcmp ueq x, -inf -> is_fpclass x, fcNegInf|fcNan
- // fcmp ueq fabs(x), -inf -> is_fpclass x, fcNan
- if (IsNegativeRHS) {
- Mask = ~fcNegInf & ~fcNan;
- if (IsFabs)
- Mask = ~fcNan;
- } else {
- Mask = ~fcPosInf & ~fcNan;
- if (IsFabs)
- Mask &= ~fcNegInf;
- }
-
- break;
- }
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- if (IsNegativeRHS) {
- // No value is ordered and less than negative infinity.
- // All values are unordered with or at least negative infinity.
- // fcmp olt x, -inf -> false
- // fcmp uge x, -inf -> true
- Mask = fcNone;
- break;
- }
-
- // fcmp olt fabs(x), +inf -> fcFinite
- // fcmp uge fabs(x), +inf -> ~fcFinite
- // fcmp olt x, +inf -> fcFinite|fcNegInf
- // fcmp uge x, +inf -> ~(fcFinite|fcNegInf)
- Mask = fcFinite;
- if (!IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- if (IsNegativeRHS) {
- // fcmp oge x, -inf -> ~fcNan
- // fcmp oge fabs(x), -inf -> ~fcNan
- // fcmp ult x, -inf -> fcNan
- // fcmp ult fabs(x), -inf -> fcNan
- Mask = ~fcNan;
- break;
- }
-
- // fcmp oge fabs(x), +inf -> fcInf
- // fcmp oge x, +inf -> fcPosInf
- // fcmp ult fabs(x), +inf -> ~fcInf
- // fcmp ult x, +inf -> ~fcPosInf
- Mask = fcPosInf;
- if (IsFabs)
- Mask |= fcNegInf;
- break;
- }
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_ULE: {
- if (IsNegativeRHS) {
- // fcmp ogt x, -inf -> fcmp one x, -inf
- // fcmp ogt fabs(x), -inf -> fcmp ord x, x
- // fcmp ule x, -inf -> fcmp ueq x, -inf
- // fcmp ule fabs(x), -inf -> fcmp uno x, x
- Mask = IsFabs ? ~fcNan : ~(fcNegInf | fcNan);
- break;
- }
-
- // No value is ordered and greater than infinity.
- Mask = fcNone;
- break;
- }
- case FCmpInst::FCMP_OLE:
- case FCmpInst::FCMP_UGT: {
- if (IsNegativeRHS) {
- Mask = IsFabs ? fcNone : fcNegInf;
- break;
- }
-
- // fcmp ole x, +inf -> fcmp ord x, x
- // fcmp ole fabs(x), +inf -> fcmp ord x, x
- // fcmp ole x, -inf -> fcmp oeq x, -inf
- // fcmp ole fabs(x), -inf -> false
- Mask = ~fcNan;
- break;
- }
- default:
- llvm_unreachable("all compare types are handled");
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- if (Pred == FCmpInst::FCMP_OEQ)
- return {Src, RHSClass, fcAllFlags};
-
- if (Pred == FCmpInst::FCMP_UEQ) {
- FPClassTest Class = RHSClass | fcNan;
- return {Src, Class, ~fcNan};
- }
-
- if (Pred == FCmpInst::FCMP_ONE)
- return {Src, ~fcNan, RHSClass | fcNan};
-
- if (Pred == FCmpInst::FCMP_UNE)
- return {Src, fcAllFlags, RHSClass};
-
- assert((RHSClass == fcNone || RHSClass == fcPosNormal ||
- RHSClass == fcNegNormal || RHSClass == fcNormal ||
- RHSClass == fcPosSubnormal || RHSClass == fcNegSubnormal ||
- RHSClass == fcSubnormal) &&
- "should have been recognized as an exact class test");
-
- if (IsNegativeRHS) {
- // TODO: Handle fneg(fabs)
- if (IsFabs) {
- // fabs(x) o> -k -> fcmp ord x, x
- // fabs(x) u> -k -> true
- // fabs(x) o< -k -> false
- // fabs(x) u< -k -> fcmp uno x, x
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ~fcNan, fcNan};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, fcAllFlags, fcNone};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, fcNone, fcAllFlags};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, fcNan, ~fcNan};
- default:
- break;
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- FPClassTest ClassesLE = fcNegInf | fcNegNormal;
- FPClassTest ClassesGE = fcPositive | fcNegZero | fcNegSubnormal;
-
- if (IsDenormalRHS)
- ClassesLE |= fcNegSubnormal;
- else
- ClassesGE |= fcNegNormal;
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- } else if (IsPositiveRHS) {
- FPClassTest ClassesGE = fcPosNormal | fcPosInf;
- FPClassTest ClassesLE = fcNegative | fcPosZero | fcPosSubnormal;
- if (IsDenormalRHS)
- ClassesGE |= fcPosSubnormal;
- else
- ClassesLE |= fcPosNormal;
-
- if (IsFabs) {
- ClassesGE = llvm::inverse_fabs(ClassesGE);
- ClassesLE = llvm::inverse_fabs(ClassesLE);
- }
-
- switch (Pred) {
- case FCmpInst::FCMP_OGT:
- case FCmpInst::FCMP_OGE:
- return {Src, ClassesGE, ~ClassesGE | RHSClass};
- case FCmpInst::FCMP_UGT:
- case FCmpInst::FCMP_UGE:
- return {Src, ClassesGE | fcNan, ~(ClassesGE | fcNan) | RHSClass};
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_OLE:
- return {Src, ClassesLE, ~ClassesLE | RHSClass};
- case FCmpInst::FCMP_ULT:
- case FCmpInst::FCMP_ULE:
- return {Src, ClassesLE | fcNan, ~(ClassesLE | fcNan) | RHSClass};
- default:
- break;
- }
- }
-
- return {Invalid, fcAllFlags, fcAllFlags};
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- const APFloat &ConstRHS, bool LookThroughSrc) {
- // We can refine checks against smallest normal / largest denormal to an
- // exact class test.
- if (!ConstRHS.isNegative() && ConstRHS.isSmallestNormalized()) {
- ValueRefT Src = LHS;
- const bool IsFabs = LookThroughSrc && lookThroughFAbs(F, LHS, Src);
-
- FPClassTest Mask;
- // Match pattern that's used in __builtin_isnormal.
- switch (Pred) {
- case FCmpInst::FCMP_OLT:
- case FCmpInst::FCMP_UGE: {
- // fcmp olt x, smallest_normal ->
- // fcNegInf|fcNegNormal|fcSubnormal|fcZero fcmp olt fabs(x),
- // smallest_normal -> fcSubnormal|fcZero fcmp uge x, smallest_normal ->
- // fcNan|fcPosNormal|fcPosInf fcmp uge fabs(x), smallest_normal ->
- // ~(fcSubnormal|fcZero)
- Mask = fcZero | fcSubnormal;
- if (!IsFabs)
- Mask |= fcNegNormal | fcNegInf;
-
- break;
- }
- case FCmpInst::FCMP_OGE:
- case FCmpInst::FCMP_ULT: {
- // fcmp oge x, smallest_normal -> fcPosNormal | fcPosInf
- // fcmp oge fabs(x), smallest_normal -> fcInf | fcNormal
- // fcmp ult x, smallest_normal -> ~(fcPosNormal | fcPosInf)
- // fcmp ult fabs(x), smallest_normal -> ~(fcInf | fcNormal)
- Mask = fcPosInf | fcPosNormal;
- if (IsFabs)
- Mask |= fcNegInf | fcNegNormal;
- break;
- }
- default:
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(),
- LookThroughSrc);
- }
-
- // Invert the comparison for the unordered cases.
- if (FCmpInst::isUnordered(Pred))
- Mask = ~Mask;
-
- return exactClass(Src, Mask);
- }
-
- return fcmpImpliesClass(Pred, F, LHS, ConstRHS.classify(), LookThroughSrc);
- }
-
- static std::tuple<ValueRefT, FPClassTest, FPClassTest>
- fcmpImpliesClass(CmpInst::Predicate Pred, const FunctionT &F, ValueRefT LHS,
- ValueRefT RHS, bool LookThroughSrc) {
- std::optional<APFloat> ConstRHS = matchConstantFloat(F, RHS);
- if (!ConstRHS)
- return {Invalid, fcAllFlags, fcAllFlags};
-
- // TODO: Just call computeKnownFPClass for RHS to handle non-constants.
- return fcmpImpliesClass(Pred, F, LHS, *ConstRHS, LookThroughSrc);
- }
-};
-
-} // namespace llvm
-
-#endif // LLVM_ADT_GENERICFLOATINGPOINTPREDICATEUTILS_H
diff --git a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h b/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
deleted file mode 100644
index 96fdbf48d8b43..0000000000000
--- a/llvm/include/llvm/Analysis/FloatingPointPredicateUtils.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//===- llvm/Analysis/FloatingPointPredicateUtils.h ------------*- C++ -*---===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-#define LLVM_ANALYSIS_FLOATINGPOINTPREDICATEUTILS_H
-
-#include "llvm/ADT/GenericFloatingPointPredicateUtils.h"
-#include "llvm/IR/SSAContext.h"
-
-namespace llvm {
-
-using FloatingPointPredicateUtils =
- GenericFloatingPointPredicateUtils<SSAContext>;
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- Value *RHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, RHS,
- LookThroughSrc = true);
-}
-
-/// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
-/// same result as an fcmp with the given operands.
-///
-/// If \p LookThroughSrc is true, consider the input value when computing the
-/// mask.
-///
-/// If \p LookThroughSrc is false, ignore the source value (i.e. the first pair
-/// element will always be LHS.
-inline std::pair<Value *, FPClassTest>
-fcmpToClassTest(FCmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat *ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpToClassTest(Pred, F, LHS, *ConstRHS,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- FPClassTest RHSClass, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, RHSClass,
- LookThroughSrc);
-}
-
-inline std::tuple<Value *, FPClassTest, FPClassTest>
-fcmpImpliesClass(CmpInst::Predicate Pred, const Function &F, Value *LHS,
- const APFloat &ConstRHS, bool LookThroughSrc = true) {
- return FloatingPointPredicateUtils::fcmpImpliesClass(Pred, F, LHS, Const...
[truncated]
|
|
alternatively this should fix the breakage without reverting: #141260. Again sorry for the breakage this has caused. |
cachemeifyoucan
approved these changes
May 23, 2025
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tgymnich
changed the title
|
Turing this into a fix rather than a revert. Since the revert would break stuff depending on this... |
tgymnich
changed the title
|
I did a quick test and the new location for header and implementation works for module layering. Thanks |
|
LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/55/builds/11777 Here is the relevant piece of the build log for the reference |
|
Bot is hitting a different error now: https://green.lab.llvm.org/job/llvm.org/job/clang-stage2-Rthinlto/769/console |
|
@cachemeifyoucan fix: #141368 |
sivan-shani
pushed a commit
to sivan-shani/llvm-project
that referenced
this pull request
Jun 3, 2025
- move GenericFloatingPointPredicateUtils from ADT to IR
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