51 lines
1.3 KiB
LLVM
51 lines
1.3 KiB
LLVM
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; RUN: opt -gvn-hoist -S < %s | FileCheck %s
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.0"
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%struct.S = type { i8* }
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declare void @f(<{ %struct.S }>* inalloca)
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; Check that we don't clone the %x alloca and insert it in the live range of
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; %argmem, which would break the inalloca contract.
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;
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; CHECK-LABEL: @test
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; CHECK: alloca i8
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; CHECK: stacksave
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; CHECK: alloca inalloca
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; CHECK-NOT: alloca i8
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; Check that store instructions are hoisted.
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; CHECK: store i8
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; CHECK-NOT: store i8
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; CHECK: stackrestore
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define void @test(i1 %b) {
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entry:
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%x = alloca i8
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%inalloca.save = call i8* @llvm.stacksave()
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%argmem = alloca inalloca <{ %struct.S }>, align 4
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%0 = getelementptr inbounds <{ %struct.S }>, <{ %struct.S }>* %argmem, i32 0, i32 0
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br i1 %b, label %true, label %false
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true:
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%p = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0
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store i8* %x, i8** %p, align 4
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br label %exit
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false:
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%p2 = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0
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store i8* %x, i8** %p2, align 4
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br label %exit
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exit:
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call void @f(<{ %struct.S }>* inalloca %argmem)
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call void @llvm.stackrestore(i8* %inalloca.save)
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ret void
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}
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declare i8* @llvm.stacksave()
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declare void @llvm.stackrestore(i8*)
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