44 lines
1.2 KiB
LLVM
44 lines
1.2 KiB
LLVM
; RUN: llc < %s -stackrealign -mtriple i386-apple-darwin -mcpu=i486 | FileCheck %s
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%struct.foo = type { [88 x i8] }
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declare void @bar(i8* nocapture, %struct.foo* align 4 byval) nounwind
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declare void @baz(i8*) nounwind
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; PR15249
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; We can't use rep;movsl here because it clobbers the base pointer in %esi.
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define void @test1(%struct.foo* nocapture %x, i32 %y) nounwind {
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%dynalloc = alloca i8, i32 %y, align 1
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call void @bar(i8* %dynalloc, %struct.foo* align 4 byval %x)
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ret void
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; CHECK-LABEL: test1:
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; CHECK: andl $-16, %esp
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; CHECK: movl %esp, %esi
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; CHECK-NOT: rep;movsl
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}
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; PR19012
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; Also don't clobber %esi if the dynamic alloca comes after the memcpy.
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define void @test2(%struct.foo* nocapture %x, i32 %y, i8* %z) nounwind {
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call void @bar(i8* %z, %struct.foo* align 4 byval %x)
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%dynalloc = alloca i8, i32 %y, align 1
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call void @baz(i8* %dynalloc)
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ret void
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; CHECK-LABEL: test2:
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; CHECK: movl %esp, %esi
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; CHECK-NOT: rep;movsl
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}
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; Check that we do use rep movs if we make the alloca static.
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define void @test3(%struct.foo* nocapture %x, i32 %y, i8* %z) nounwind {
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call void @bar(i8* %z, %struct.foo* align 4 byval %x)
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%statalloc = alloca i8, i32 8, align 1
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call void @baz(i8* %statalloc)
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ret void
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; CHECK-LABEL: test3:
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; CHECK: rep;movsl
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}
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