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37c24a1860
EAX can turn out to be alive here, when shrink wrapping is done (which is allowed when using dwarf exceptions, contrary to the normal case with WinCFI). This fixes PR36487. Differential Revision: https://reviews.llvm.org/D43968 llvm-svn: 326764
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; RUN: llc -mtriple=x86_64-windows-gnu -exception-model=dwarf < %s | FileCheck %s
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%struct.A = type { [4096 x i8] }
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@a = common global i32 0, align 4
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@b = common global i32 0, align 4
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define void @fn1() nounwind uwtable {
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entry:
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%ctx = alloca %struct.A, align 1
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%0 = load i32, i32* @a, align 4
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%tobool = icmp eq i32 %0, 0
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%div = sdiv i32 %0, 6
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%cond = select i1 %tobool, i32 %div, i32 %0
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store i32 %cond, i32* @b, align 4
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%1 = getelementptr inbounds %struct.A, %struct.A* %ctx, i64 0, i32 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 4096, i8* nonnull %1)
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%2 = ptrtoint %struct.A* %ctx to i64
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%3 = trunc i64 %2 to i32
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call void @fn2(i32 %3)
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call void @llvm.lifetime.end.p0i8(i64 4096, i8* nonnull %1)
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ret void
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}
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declare void @fn2(i32)
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
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; CHECK-LABEL: fn1:
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; CHECK: pushq %rax
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; CHECK: movl $4128, %eax
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; CHECK: callq ___chkstk_ms
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; CHECK: subq %rax, %rsp
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; CHECK: movq 4128(%rsp), %rax
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; CHECK: addq $4136, %rsp
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