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https://github.com/c64scene-ar/llvm-6502.git
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5dc48ac04a
A byval object, even if allocated at a fixed offset (prescribed by the ABI) is pointed to by IR values. Most fixed-offset stack objects are not pointed-to by IR values, so the default is to assume this is not possible. However, we need to override the default in this case (instruction scheduling can cause miscompiles otherwise). Fixes PR20280. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215795 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
813 B
LLVM
31 lines
813 B
LLVM
; RUN: llc -mcpu=ppc64 < %s | FileCheck %s
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target datalayout = "E-m:o-p:32:32-f64:32:64-n32"
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target triple = "powerpc-apple-macosx10.5.0"
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%struct.sm = type { i8, i8 }
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; Function Attrs: nounwind ssp
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define void @foo(%struct.sm* byval %s) #0 {
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entry:
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%a = getelementptr inbounds %struct.sm* %s, i32 0, i32 0
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%0 = load i8* %a, align 1
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%conv2 = zext i8 %0 to i32
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%add = add nuw nsw i32 %conv2, 3
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%conv1 = trunc i32 %add to i8
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store i8 %conv1, i8* %a, align 1
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call void @bar(%struct.sm* byval %s, %struct.sm* byval %s) #1
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ret void
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}
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; CHECK-LABEL: @foo
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; CHECK: stb {{r[0-9]+}}, [[OFF:[0-9]+]]({{r[3]?1}})
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; CHECK: lhz r3, [[OFF]]({{r[3]?1}})
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; CHECK: bl _bar
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; CHECK: blr
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declare void @bar(%struct.sm* byval, %struct.sm* byval)
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attributes #0 = { nounwind ssp }
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attributes #1 = { nounwind }
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