71 lines
1.5 KiB
LLVM
71 lines
1.5 KiB
LLVM
; RUN: opt < %s -basic-aa -dse -enable-dse-memoryssa=false -S | FileCheck %s
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target datalayout = "e-p:64:64:64"
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declare void @free(i8* nocapture)
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declare noalias i8* @malloc(i64)
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; CHECK-LABEL: @test(
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: @free
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; CHECK-NEXT: ret void
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define void @test(i32* %Q, i32* %P) {
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%DEAD = load i32, i32* %Q ; <i32> [#uses=1]
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store i32 %DEAD, i32* %P
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%1 = bitcast i32* %P to i8*
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tail call void @free(i8* %1) nounwind
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ret void
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}
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: @free
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; CHECK-NEXT: ret void
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define void @test2({i32, i32}* %P) {
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%Q = getelementptr {i32, i32}, {i32, i32} *%P, i32 0, i32 1
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store i32 4, i32* %Q
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%1 = bitcast {i32, i32}* %P to i8*
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tail call void @free(i8* %1) nounwind
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ret void
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}
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; CHECK-LABEL: @test3(
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; CHECK-NOT: store
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; CHECK: ret void
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define void @test3() {
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%m = call i8* @malloc(i64 24)
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store i8 0, i8* %m
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%m1 = getelementptr i8, i8* %m, i64 1
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store i8 1, i8* %m1
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call void @free(i8* %m) nounwind
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ret void
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}
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; PR11240
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; CHECK-LABEL: @test4(
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; CHECK-NOT: store
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; CHECK: ret void
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define void @test4(i1 %x) nounwind {
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entry:
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%alloc1 = tail call noalias i8* @malloc(i64 4) nounwind
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br i1 %x, label %skipinit1, label %init1
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init1:
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store i8 1, i8* %alloc1
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br label %skipinit1
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skipinit1:
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tail call void @free(i8* %alloc1) nounwind
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ret void
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}
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; CHECK-LABEL: @test5(
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define void @test5() {
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br label %bb
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bb:
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tail call void @free(i8* undef) nounwind
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br label %bb
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}
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