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[NFC][InstCombine] Add test with non-CSE'd casts of load
in @t0 we can still change type of load and get rid of casts.
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llvm/test/Transforms/InstCombine/multi-use-load-casts.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -S -instcombine < %s | FileCheck %s | ||
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" | ||
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; Positive test - all uses are identical casts. | ||
define void @t0(i1 zeroext %c0, i1 zeroext %c1, i64* nocapture readonly %src) { | ||
; CHECK-LABEL: @t0( | ||
; CHECK-NEXT: bb: | ||
; CHECK-NEXT: [[DATA:%.*]] = load i64, i64* [[SRC:%.*]], align 8 | ||
; CHECK-NEXT: br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]] | ||
; CHECK: bb3: | ||
; CHECK-NEXT: br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]] | ||
; CHECK: bb4: | ||
; CHECK-NEXT: tail call void @abort() | ||
; CHECK-NEXT: unreachable | ||
; CHECK: bb5: | ||
; CHECK-NEXT: [[PTR0:%.*]] = inttoptr i64 [[DATA]] to i32* | ||
; CHECK-NEXT: tail call void @sink0(i32* [[PTR0]]) | ||
; CHECK-NEXT: br label [[BB9:%.*]] | ||
; CHECK: bb7: | ||
; CHECK-NEXT: [[PTR1:%.*]] = inttoptr i64 [[DATA]] to i32* | ||
; CHECK-NEXT: tail call void @sink1(i32* [[PTR1]]) | ||
; CHECK-NEXT: br label [[BB9]] | ||
; CHECK: bb9: | ||
; CHECK-NEXT: ret void | ||
; | ||
bb: | ||
%data = load i64, i64* %src, align 8 | ||
br i1 %c0, label %bb3, label %bb7 | ||
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bb3: | ||
br i1 %c1, label %bb4, label %bb5 | ||
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bb4: | ||
tail call void @abort() | ||
unreachable | ||
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bb5: | ||
%ptr0 = inttoptr i64 %data to i32* | ||
tail call void @sink0(i32* %ptr0) | ||
br label %bb9 | ||
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bb7: | ||
%ptr1 = inttoptr i64 %data to i32* | ||
tail call void @sink1(i32* %ptr1) | ||
br label %bb9 | ||
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bb9: | ||
ret void | ||
} | ||
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; Negative test - all uses are casts, but non-identical ones. | ||
define void @n1(i1 zeroext %c0, i1 zeroext %c1, i64* nocapture readonly %src) { | ||
; CHECK-LABEL: @n1( | ||
; CHECK-NEXT: bb: | ||
; CHECK-NEXT: [[DATA:%.*]] = load i64, i64* [[SRC:%.*]], align 8 | ||
; CHECK-NEXT: br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]] | ||
; CHECK: bb3: | ||
; CHECK-NEXT: br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]] | ||
; CHECK: bb4: | ||
; CHECK-NEXT: tail call void @abort() | ||
; CHECK-NEXT: unreachable | ||
; CHECK: bb5: | ||
; CHECK-NEXT: [[PTR0:%.*]] = inttoptr i64 [[DATA]] to i32* | ||
; CHECK-NEXT: tail call void @sink0(i32* [[PTR0]]) | ||
; CHECK-NEXT: br label [[BB9:%.*]] | ||
; CHECK: bb7: | ||
; CHECK-NEXT: [[VEC:%.*]] = bitcast i64 [[DATA]] to <2 x i32> | ||
; CHECK-NEXT: tail call void @sink2(<2 x i32> [[VEC]]) | ||
; CHECK-NEXT: br label [[BB9]] | ||
; CHECK: bb9: | ||
; CHECK-NEXT: ret void | ||
; | ||
bb: | ||
%data = load i64, i64* %src, align 8 | ||
br i1 %c0, label %bb3, label %bb7 | ||
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bb3: | ||
br i1 %c1, label %bb4, label %bb5 | ||
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bb4: | ||
tail call void @abort() | ||
unreachable | ||
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bb5: | ||
%ptr0 = inttoptr i64 %data to i32* | ||
tail call void @sink0(i32* %ptr0) | ||
br label %bb9 | ||
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bb7: | ||
%vec = bitcast i64 %data to <2 x i32> ; different cast | ||
tail call void @sink2(<2 x i32> %vec) | ||
br label %bb9 | ||
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bb9: | ||
ret void | ||
} | ||
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; Negative test - have non-cast users. | ||
define void @n2(i1 zeroext %c0, i1 zeroext %c1, i64* nocapture readonly %src) { | ||
; CHECK-LABEL: @n2( | ||
; CHECK-NEXT: bb: | ||
; CHECK-NEXT: [[DATA:%.*]] = load i64, i64* [[SRC:%.*]], align 8 | ||
; CHECK-NEXT: br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]] | ||
; CHECK: bb3: | ||
; CHECK-NEXT: br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]] | ||
; CHECK: bb4: | ||
; CHECK-NEXT: tail call void @abort() | ||
; CHECK-NEXT: unreachable | ||
; CHECK: bb5: | ||
; CHECK-NEXT: [[PTR0:%.*]] = inttoptr i64 [[DATA]] to i32* | ||
; CHECK-NEXT: tail call void @sink0(i32* [[PTR0]]) | ||
; CHECK-NEXT: br label [[BB9:%.*]] | ||
; CHECK: bb7: | ||
; CHECK-NEXT: tail call void @sink3(i64 [[DATA]]) | ||
; CHECK-NEXT: br label [[BB9]] | ||
; CHECK: bb9: | ||
; CHECK-NEXT: ret void | ||
; | ||
bb: | ||
%data = load i64, i64* %src, align 8 | ||
br i1 %c0, label %bb3, label %bb7 | ||
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bb3: | ||
br i1 %c1, label %bb4, label %bb5 | ||
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bb4: | ||
tail call void @abort() | ||
unreachable | ||
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bb5: | ||
%ptr0 = inttoptr i64 %data to i32* | ||
tail call void @sink0(i32* %ptr0) | ||
br label %bb9 | ||
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bb7: | ||
tail call void @sink3(i64 %data) ; non-cast use | ||
br label %bb9 | ||
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bb9: | ||
ret void | ||
} | ||
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declare void @abort() | ||
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declare void @sink0(i32*) | ||
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declare void @sink1(i32*) | ||
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declare void @sink2(<2 x i32>) | ||
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declare void @sink3(i64) |