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5a5ebb7f9f
For safety, the inliner cannot decrease the allignment on an alloca when merging it with another. I've included two variants of the test case for this: one with DataLayout available, and one without. When DataLayout is not available, if only one of the allocas uses the default alignment (getAlignment() == 0), then they cannot be safely merged. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186425 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
2.9 KiB
LLVM
94 lines
2.9 KiB
LLVM
; RUN: opt < %s -inline -S | FileCheck %s
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; This variant of the test has no data layout information.
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target triple = "powerpc64-unknown-linux-gnu"
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%struct.s = type { i32, i32 }
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define void @foo(%struct.s* byval nocapture readonly %a) {
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entry:
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%x = alloca [2 x i32], align 4
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%a1 = getelementptr inbounds %struct.s* %a, i64 0, i32 0
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%0 = load i32* %a1, align 4, !tbaa !0
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%arrayidx = getelementptr inbounds [2 x i32]* %x, i64 0, i64 0
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store i32 %0, i32* %arrayidx, align 4, !tbaa !0
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%b = getelementptr inbounds %struct.s* %a, i64 0, i32 1
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%1 = load i32* %b, align 4, !tbaa !0
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%arrayidx2 = getelementptr inbounds [2 x i32]* %x, i64 0, i64 1
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store i32 %1, i32* %arrayidx2, align 4, !tbaa !0
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call void @bar(i32* %arrayidx) #2
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ret void
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}
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define void @foo0(%struct.s* byval nocapture readonly %a) {
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entry:
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%x = alloca [2 x i32]
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%a1 = getelementptr inbounds %struct.s* %a, i64 0, i32 0
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%0 = load i32* %a1, align 4, !tbaa !0
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%arrayidx = getelementptr inbounds [2 x i32]* %x, i64 0, i64 0
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store i32 %0, i32* %arrayidx, align 4, !tbaa !0
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%b = getelementptr inbounds %struct.s* %a, i64 0, i32 1
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%1 = load i32* %b, align 4, !tbaa !0
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%arrayidx2 = getelementptr inbounds [2 x i32]* %x, i64 0, i64 1
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store i32 %1, i32* %arrayidx2, align 4, !tbaa !0
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call void @bar(i32* %arrayidx) #2
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ret void
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}
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declare void @bar(i32*) #1
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define void @goo(%struct.s* byval nocapture readonly %a) {
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entry:
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%x = alloca [2 x i32], align 32
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%a1 = getelementptr inbounds %struct.s* %a, i64 0, i32 0
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%0 = load i32* %a1, align 4, !tbaa !0
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%arrayidx = getelementptr inbounds [2 x i32]* %x, i64 0, i64 0
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store i32 %0, i32* %arrayidx, align 32, !tbaa !0
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%b = getelementptr inbounds %struct.s* %a, i64 0, i32 1
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%1 = load i32* %b, align 4, !tbaa !0
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%arrayidx2 = getelementptr inbounds [2 x i32]* %x, i64 0, i64 1
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store i32 %1, i32* %arrayidx2, align 4, !tbaa !0
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call void @bar(i32* %arrayidx) #2
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ret void
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}
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; CHECK-LABEL: @main
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; CHECK: alloca [2 x i32], align 32
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; CHECK-NOT: alloca [2 x i32]
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; CHECK: ret i32 0
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define signext i32 @main() {
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entry:
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%a = alloca i64, align 8
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%tmpcast = bitcast i64* %a to %struct.s*
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store i64 0, i64* %a, align 8
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%a1 = bitcast i64* %a to i32*
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store i32 1, i32* %a1, align 8, !tbaa !0
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call void @foo(%struct.s* byval %tmpcast)
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store i32 2, i32* %a1, align 8, !tbaa !0
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call void @goo(%struct.s* byval %tmpcast)
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ret i32 0
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}
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; CHECK-LABEL: @test0
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; CHECK: alloca [2 x i32], align 32
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; CHECK: alloca [2 x i32]
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; CHECK: ret i32 0
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define signext i32 @test0() {
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entry:
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%a = alloca i64, align 8
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%tmpcast = bitcast i64* %a to %struct.s*
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store i64 0, i64* %a, align 8
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%a1 = bitcast i64* %a to i32*
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store i32 1, i32* %a1, align 8, !tbaa !0
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call void @foo0(%struct.s* byval %tmpcast)
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store i32 2, i32* %a1, align 8, !tbaa !0
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call void @goo(%struct.s* byval %tmpcast)
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ret i32 0
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}
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!0 = metadata !{metadata !"int", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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