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[InstCombine] Don't sink if it would require dropping deref assumptions. #166945

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Merged
merged 4 commits into from
Nov 9, 2025
Merged

[InstCombine] Don't sink if it would require dropping deref assumptions. #166945

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bff824e
[InstCombine] Add extra tests.
fhahn Nov 7, 2025
6b52481
[InstCombine] Don't sink if it would require dropping deref assumptions.
fhahn Nov 7, 2025
ae29bfe
!fixup move code to getOptionalSinkBlockForInst.
fhahn Nov 7, 2025
2f5e3de
Merge branch 'main' into ic-sinking-with-deref-assumptions
fhahn Nov 9, 2025
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11 changes: 9 additions & 2 deletions llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5627,8 +5627,15 @@ bool InstCombinerImpl::run() {

for (Use &U : I->uses()) {
User *User = U.getUser();
if (User->isDroppable())
continue;
if (User->isDroppable()) {
// Do not sink if there are dereferenceable assumes that would be
// removed.
auto II = dyn_cast<IntrinsicInst>(User);
if (II->getIntrinsicID() != Intrinsic::assume ||
!II->getOperandBundle("dereferenceable"))
continue;
}

if (NumUsers > MaxSinkNumUsers)
return std::nullopt;

Expand Down
104 changes: 98 additions & 6 deletions llvm/test/Transforms/InstCombine/sink-dereferenceable-assume.ll
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@@ -1,15 +1,44 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -p instcombine -S %s | FileCheck %s

define i64 @test_sink_with_dereferenceable_assume(ptr %p, ptr %q, i1 %cond) {
; CHECK-LABEL: define i64 @test_sink_with_dereferenceable_assume(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[COND:%.*]]) {
define i64 @test_dereferenceable_assume(ptr %p, ptr %q, i1 %c.0) {
; CHECK-LABEL: define i64 @test_dereferenceable_assume(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[C_0:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br i1 [[COND]], label %[[THEN:.*]], label %[[ELSE:.*]]
; CHECK-NEXT: [[P_INT:%.*]] = ptrtoint ptr [[P]] to i64
; CHECK-NEXT: [[Q_INT:%.*]] = ptrtoint ptr [[Q]] to i64
; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[Q_INT]], [[P_INT]]
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[DIFF]]) ]
; CHECK-NEXT: br i1 [[C_0]], label %[[THEN:.*]], label %[[ELSE:.*]]
; CHECK: [[THEN]]:
; CHECK-NEXT: ret i64 [[DIFF]]
; CHECK: [[ELSE]]:
; CHECK-NEXT: ret i64 0
;
entry:
%p_int = ptrtoint ptr %p to i64
%q_int = ptrtoint ptr %q to i64
%diff = sub i64 %q_int, %p_int
call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %diff) ]
br i1 %c.0, label %then, label %else

then:
ret i64 %diff

else:
ret i64 0
}

define i64 @test_sink_with_dereferenceable_assume_same_block_as_user(ptr %p, ptr %q, i1 %c.0) {
; CHECK-LABEL: define i64 @test_sink_with_dereferenceable_assume_same_block_as_user(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[C_0:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br i1 [[C_0]], label %[[THEN:.*]], label %[[ELSE:.*]]
; CHECK: [[THEN]]:
; CHECK-NEXT: [[Q_INT:%.*]] = ptrtoint ptr [[Q]] to i64
; CHECK-NEXT: [[P_INT:%.*]] = ptrtoint ptr [[P]] to i64
; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[Q_INT]], [[P_INT]]
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[DIFF]]) ]
; CHECK-NEXT: ret i64 [[DIFF]]
; CHECK: [[ELSE]]:
; CHECK-NEXT: ret i64 0
Expand All @@ -18,14 +47,77 @@ entry:
%p_int = ptrtoint ptr %p to i64
%q_int = ptrtoint ptr %q to i64
%diff = sub i64 %q_int, %p_int
call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %diff) ]
br i1 %cond, label %then, label %else
br i1 %c.0, label %then, label %else

then:
call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %diff) ]
ret i64 %diff

else:
ret i64 0
}

define i64 @test_sink_with_multiple_users_dominated_by_deref(ptr %p, ptr %q, i1 %c.0, i1 %c.1) {
; CHECK-LABEL: define i64 @test_sink_with_multiple_users_dominated_by_deref(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[C_0:%.*]], i1 [[C_1:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[P_INT:%.*]] = ptrtoint ptr [[P]] to i64
; CHECK-NEXT: [[Q_INT:%.*]] = ptrtoint ptr [[Q]] to i64
; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[Q_INT]], [[P_INT]]
; CHECK-NEXT: br i1 [[C_0]], label %[[THEN:.*]], label %[[ELSE:.*]]
; CHECK: [[THEN]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[DIFF]]) ]
; CHECK-NEXT: br i1 [[C_1]], label %[[THEN_2:.*]], label %[[ELSE]]
; CHECK: [[THEN_2]]:
; CHECK-NEXT: [[DOUBLED:%.*]] = shl i64 [[DIFF]], 1
; CHECK-NEXT: ret i64 [[DOUBLED]]
; CHECK: [[ELSE]]:
; CHECK-NEXT: ret i64 0
;
entry:
%p_int = ptrtoint ptr %p to i64
%q_int = ptrtoint ptr %q to i64
%diff = sub i64 %q_int, %p_int
br i1 %c.0, label %then, label %else

then:
call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %diff) ]
br i1 %c.1, label %then.2, label %else

then.2:
%doubled = mul i64 %diff, 2
ret i64 %doubled

else:
ret i64 0
}

define i64 @test_deref_user_does_not_dominate_other_user(ptr %p, ptr %q, i1 %c.0) {
; CHECK-LABEL: define i64 @test_deref_user_does_not_dominate_other_user(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[C_0:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[P_INT:%.*]] = ptrtoint ptr [[P]] to i64
; CHECK-NEXT: [[Q_INT:%.*]] = ptrtoint ptr [[Q]] to i64
; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[Q_INT]], [[P_INT]]
; CHECK-NEXT: br i1 [[C_0]], label %[[MIDDLE:.*]], label %[[EXIT:.*]]
; CHECK: [[MIDDLE]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[DIFF]]) ]
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret i64 [[DIFF]]
;
entry:
%p_int = ptrtoint ptr %p to i64
%q_int = ptrtoint ptr %q to i64
%diff = sub i64 %q_int, %p_int
br i1 %c.0, label %middle, label %exit

middle:
call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %diff) ]
br label %exit

exit:
ret i64 %diff
}

declare void @llvm.assume(i1 noundef)
102 changes: 46 additions & 56 deletions llvm/test/Transforms/PhaseOrdering/AArch64/std-find.ll
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Expand Up @@ -133,75 +133,65 @@ define ptr @std_find_caller(ptr noundef %first, ptr noundef %last) {
; CHECK-LABEL: define noundef ptr @std_find_caller(
; CHECK-SAME: ptr noundef [[FIRST:%.*]], ptr noundef [[LAST:%.*]]) local_unnamed_addr #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[FIRST3:%.*]] = ptrtoint ptr [[FIRST]] to i64
; CHECK-NEXT: [[LAST_I64:%.*]] = ptrtoint ptr [[LAST]] to i64
; CHECK-NEXT: [[PTR_SUB:%.*]] = sub i64 [[LAST_I64]], [[FIRST3]]
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[FIRST]], i64 2) ]
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[LAST]], i64 2) ]
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[FIRST]], i64 [[PTR_SUB]]) ]
; CHECK-NEXT: [[PRE_I:%.*]] = icmp eq ptr [[FIRST]], [[LAST]]
; CHECK-NEXT: br i1 [[PRE_I]], label %[[STD_FIND_GENERIC_IMPL_EXIT:.*]], label %[[LOOP_HEADER_I_PREHEADER:.*]]
; CHECK: [[LOOP_HEADER_I_PREHEADER]]:
; CHECK-NEXT: [[LAST2:%.*]] = ptrtoint ptr [[LAST]] to i64
; CHECK-NEXT: [[FIRST3:%.*]] = ptrtoint ptr [[FIRST]] to i64
; CHECK-NEXT: [[LAST_I64:%.*]] = ptrtoint ptr [[LAST]] to i64
; CHECK-NEXT: [[FIRST1:%.*]] = ptrtoint ptr [[FIRST]] to i64
; CHECK-NEXT: [[PTR_SUB:%.*]] = sub i64 [[LAST_I64]], [[FIRST1]]
; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[FIRST]], i64 [[PTR_SUB]]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[LAST2]], -2
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[LAST_I64]], -2
; CHECK-NEXT: [[TMP1:%.*]] = sub i64 [[TMP0]], [[FIRST3]]
; CHECK-NEXT: [[TMP2:%.*]] = lshr exact i64 [[TMP1]], 1
; CHECK-NEXT: [[TMP3:%.*]] = add nuw i64 [[TMP2]], 1
; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[TMP3]], 3
; CHECK-NEXT: [[TMP4:%.*]] = and i64 [[TMP1]], 6
; CHECK-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[TMP4]], 6
; CHECK-NEXT: br i1 [[LCMP_MOD_NOT]], label %[[LOOP_HEADER_I_PROL_LOOPEXIT:.*]], label %[[LOOP_HEADER_I_PROL:.*]]
; CHECK: [[LOOP_HEADER_I_PROL]]:
; CHECK-NEXT: [[PTR_IV_I_PROL:%.*]] = phi ptr [ [[PTR_IV_NEXT_I_PROL:%.*]], %[[LOOP_LATCH_I_PROL:.*]] ], [ [[FIRST]], %[[LOOP_HEADER_I_PREHEADER]] ]
; CHECK-NEXT: [[PROL_ITER:%.*]] = phi i64 [ [[PROL_ITER_NEXT:%.*]], %[[LOOP_LATCH_I_PROL]] ], [ 0, %[[LOOP_HEADER_I_PREHEADER]] ]
; CHECK-NEXT: [[L_I_PROL:%.*]] = load i16, ptr [[PTR_IV_I_PROL]], align 2
; CHECK-NEXT: [[C_1_I_PROL:%.*]] = icmp eq i16 [[L_I_PROL]], 1
; CHECK-NEXT: br i1 [[C_1_I_PROL]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_LATCH_I_PROL]]
; CHECK: [[LOOP_LATCH_I_PROL]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_PROL]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I_PROL]], i64 2
; CHECK-NEXT: [[PROL_ITER_NEXT]] = add i64 [[PROL_ITER]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP1]], 158
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[LOOP_HEADER_I_PREHEADER2:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[TMP3]], -8
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[PROL_ITER_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[OFFSET_IDX:%.*]] = shl i64 [[INDEX]], 1
; CHECK-NEXT: [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[FIRST]], i64 [[OFFSET_IDX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <8 x i16>, ptr [[NEXT_GEP]], align 2
; CHECK-NEXT: [[WIDE_LOAD_FR:%.*]] = freeze <8 x i16> [[WIDE_LOAD]]
; CHECK-NEXT: [[TMP4:%.*]] = icmp eq <8 x i16> [[WIDE_LOAD_FR]], splat (i16 1)
; CHECK-NEXT: [[PROL_ITER_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT: [[TMP5:%.*]] = bitcast <8 x i1> [[TMP4]] to i8
; CHECK-NEXT: [[TMP6:%.*]] = icmp ne i8 [[TMP5]], 0
; CHECK-NEXT: [[PROL_ITER_CMP_NOT:%.*]] = icmp eq i64 [[PROL_ITER_NEXT]], [[XTRAITER]]
; CHECK-NEXT: br i1 [[PROL_ITER_CMP_NOT]], label %[[LOOP_HEADER_I_PROL_LOOPEXIT]], label %[[LOOP_HEADER_I_PROL]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: [[LOOP_HEADER_I_PROL_LOOPEXIT]]:
; CHECK-NEXT: [[PTR_IV_I_UNR:%.*]] = phi ptr [ [[FIRST]], %[[LOOP_HEADER_I_PREHEADER]] ], [ [[PTR_IV_NEXT_I_PROL]], %[[LOOP_LATCH_I_PROL]] ]
; CHECK-NEXT: [[TMP5:%.*]] = icmp ult i64 [[TMP1]], 6
; CHECK-NEXT: br i1 [[TMP5]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_HEADER_I:.*]]
; CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP6]], [[PROL_ITER_CMP_NOT]]
; CHECK-NEXT: br i1 [[TMP8]], label %[[MIDDLE_SPLIT:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: [[MIDDLE_SPLIT]]:
; CHECK-NEXT: [[TMP9:%.*]] = shl i64 [[XTRAITER]], 1
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr i8, ptr [[FIRST]], i64 [[TMP9]]
; CHECK-NEXT: br i1 [[TMP6]], label %[[VECTOR_EARLY_EXIT:.*]], label %[[MIDDLE_BLOCK:.*]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP3]], [[XTRAITER]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_HEADER_I_PREHEADER2]]
; CHECK: [[LOOP_HEADER_I_PREHEADER2]]:
; CHECK-NEXT: [[PTR_IV_I_PH:%.*]] = phi ptr [ [[FIRST]], %[[LOOP_HEADER_I_PREHEADER]] ], [ [[TMP10]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: br label %[[LOOP_HEADER_I:.*]]
; CHECK: [[VECTOR_EARLY_EXIT]]:
; CHECK-NEXT: [[TMP11:%.*]] = tail call i64 @llvm.experimental.cttz.elts.i64.v8i1(<8 x i1> [[TMP4]], i1 true)
; CHECK-NEXT: [[TMP12:%.*]] = add i64 [[INDEX]], [[TMP11]]
; CHECK-NEXT: [[TMP13:%.*]] = shl i64 [[TMP12]], 1
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr i8, ptr [[FIRST]], i64 [[TMP13]]
; CHECK-NEXT: br label %[[STD_FIND_GENERIC_IMPL_EXIT]]
; CHECK: [[LOOP_HEADER_I]]:
; CHECK-NEXT: [[PTR_IV_I:%.*]] = phi ptr [ [[PTR_IV_NEXT_I_3:%.*]], %[[LOOP_LATCH_I_3:.*]] ], [ [[PTR_IV_I_UNR]], %[[LOOP_HEADER_I_PROL_LOOPEXIT]] ]
; CHECK-NEXT: [[PTR_IV_I:%.*]] = phi ptr [ [[PTR_IV_NEXT_I:%.*]], %[[LOOP_LATCH_I:.*]] ], [ [[PTR_IV_I_PH]], %[[LOOP_HEADER_I_PREHEADER2]] ]
; CHECK-NEXT: [[L_I:%.*]] = load i16, ptr [[PTR_IV_I]], align 2
; CHECK-NEXT: [[C_1_I:%.*]] = icmp eq i16 [[L_I]], 1
; CHECK-NEXT: br i1 [[C_1_I]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_LATCH_I:.*]]
; CHECK-NEXT: br i1 [[C_1_I]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_LATCH_I]]
; CHECK: [[LOOP_LATCH_I]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 2
; CHECK-NEXT: [[L_I_1:%.*]] = load i16, ptr [[PTR_IV_NEXT_I]], align 2
; CHECK-NEXT: [[C_1_I_1:%.*]] = icmp eq i16 [[L_I_1]], 1
; CHECK-NEXT: br i1 [[C_1_I_1]], label %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT11:.*]], label %[[LOOP_LATCH_I_1:.*]]
; CHECK: [[LOOP_LATCH_I_1]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_1:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 4
; CHECK-NEXT: [[L_I_2:%.*]] = load i16, ptr [[PTR_IV_NEXT_I_1]], align 2
; CHECK-NEXT: [[C_1_I_2:%.*]] = icmp eq i16 [[L_I_2]], 1
; CHECK-NEXT: br i1 [[C_1_I_2]], label %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT9:.*]], label %[[LOOP_LATCH_I_2:.*]]
; CHECK: [[LOOP_LATCH_I_2]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_2:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 6
; CHECK-NEXT: [[L_I_3:%.*]] = load i16, ptr [[PTR_IV_NEXT_I_2]], align 2
; CHECK-NEXT: [[C_1_I_3:%.*]] = icmp eq i16 [[L_I_3]], 1
; CHECK-NEXT: br i1 [[C_1_I_3]], label %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT7:.*]], label %[[LOOP_LATCH_I_3]]
; CHECK: [[LOOP_LATCH_I_3]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_3]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 8
; CHECK-NEXT: [[EC_I_3:%.*]] = icmp eq ptr [[PTR_IV_NEXT_I_3]], [[LAST]]
; CHECK-NEXT: br i1 [[EC_I_3]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_HEADER_I]]
; CHECK: [[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT7]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_2_LE:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 6
; CHECK-NEXT: br label %[[STD_FIND_GENERIC_IMPL_EXIT]]
; CHECK: [[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT9]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_1_LE:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 4
; CHECK-NEXT: br label %[[STD_FIND_GENERIC_IMPL_EXIT]]
; CHECK: [[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT11]]:
; CHECK-NEXT: [[PTR_IV_NEXT_I_LE:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 2
; CHECK-NEXT: br label %[[STD_FIND_GENERIC_IMPL_EXIT]]
; CHECK-NEXT: [[PTR_IV_NEXT_I]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_I]], i64 2
; CHECK-NEXT: [[EC_I:%.*]] = icmp eq ptr [[PTR_IV_NEXT_I]], [[LAST]]
; CHECK-NEXT: br i1 [[EC_I]], label %[[STD_FIND_GENERIC_IMPL_EXIT]], label %[[LOOP_HEADER_I]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: [[STD_FIND_GENERIC_IMPL_EXIT]]:
; CHECK-NEXT: [[RES_I:%.*]] = phi ptr [ [[FIRST]], %[[ENTRY]] ], [ [[SCEVGEP]], %[[LOOP_HEADER_I_PROL_LOOPEXIT]] ], [ [[PTR_IV_NEXT_I_2_LE]], %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT7]] ], [ [[PTR_IV_NEXT_I_1_LE]], %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT9]] ], [ [[PTR_IV_NEXT_I_LE]], %[[STD_FIND_GENERIC_IMPL_EXIT_LOOPEXIT_UNR_LCSSA_LOOPEXIT_SPLIT_LOOP_EXIT11]] ], [ [[SCEVGEP]], %[[LOOP_LATCH_I_3]] ], [ [[PTR_IV_I]], %[[LOOP_HEADER_I]] ], [ [[PTR_IV_I_PROL]], %[[LOOP_HEADER_I_PROL]] ]
; CHECK-NEXT: [[RES_I:%.*]] = phi ptr [ [[FIRST]], %[[ENTRY]] ], [ [[SCEVGEP]], %[[MIDDLE_BLOCK]] ], [ [[TMP14]], %[[VECTOR_EARLY_EXIT]] ], [ [[SCEVGEP]], %[[LOOP_LATCH_I]] ], [ [[PTR_IV_I]], %[[LOOP_HEADER_I]] ]
; CHECK-NEXT: ret ptr [[RES_I]]
;
entry:
Expand Down Expand Up @@ -241,6 +231,6 @@ declare void @llvm.assume(i1 noundef)
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META4:![0-9]+]]}
; CHECK: [[META4]] = !{!"llvm.loop.unroll.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]], [[META2]]}
; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META2]], [[META1]]}
;.
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