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43 lines
1.4 KiB
LLVM
43 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -memcpyopt < %s -enable-memcpyopt-memoryssa=0 | FileCheck %s
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; RUN: opt -S -memcpyopt < %s -enable-memcpyopt-memoryssa=1 -verify-memoryssa | FileCheck %s
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declare void @may_throw(i32* nocapture %x)
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define void @test1(i32* nocapture noalias dereferenceable(4) %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(i32* nonnull [[T]])
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[T]], align 4
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; CHECK-NEXT: store i32 [[LOAD]], i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(i32* nonnull %t)
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%load = load i32, i32* %t, align 4
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store i32 %load, i32* %x, align 4
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ret void
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}
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declare void @always_throws()
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define void @test2(i32* nocapture noalias dereferenceable(4) %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @may_throw(i32* nonnull [[T]]) [[ATTR0:#.*]]
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[T]], align 4
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; CHECK-NEXT: call void @always_throws()
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; CHECK-NEXT: store i32 [[LOAD]], i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%t = alloca i32, align 4
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call void @may_throw(i32* nonnull %t) nounwind
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%load = load i32, i32* %t, align 4
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call void @always_throws()
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store i32 %load, i32* %x, align 4
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ret void
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}
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