60 lines
2.1 KiB
LLVM
60 lines
2.1 KiB
LLVM
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; RUN: opt -S -inline < %s | FileCheck %s
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; RUN: opt -S -O3 < %s | FileCheck %s
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; RUN: opt -S -inline -inline-threshold=1 < %s | FileCheck %s
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%struct.A = type <{ i32 (...)**, i32, [4 x i8] }>
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; This test checks if value returned from the launder is considered aliasing
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; with its argument. Due to bug caused by handling launder in capture tracking
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; sometimes it would be considered noalias.
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; CHECK-LABEL: define i32 @bar(%struct.A* noalias
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define i32 @bar(%struct.A* noalias) {
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; CHECK-NOT: noalias
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%2 = bitcast %struct.A* %0 to i8*
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%3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %2)
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%4 = getelementptr inbounds i8, i8* %3, i64 8
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%5 = bitcast i8* %4 to i32*
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store i32 42, i32* %5, align 8
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%6 = getelementptr inbounds %struct.A, %struct.A* %0, i64 0, i32 1
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%7 = load i32, i32* %6, align 8
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ret i32 %7
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}
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; CHECK-LABEL: define i32 @foo(%struct.A* noalias
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define i32 @foo(%struct.A* noalias) {
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; CHECK-NOT: call i32 @bar(
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; CHECK-NOT: !noalias
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%2 = tail call i32 @bar(%struct.A* %0)
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ret i32 %2
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}
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; This test checks if invariant group intrinsics have zero cost for inlining.
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; CHECK-LABEL: define i8* @caller(i8*
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define i8* @caller(i8* %p) {
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; CHECK-NOT: call i8* @lot_of_launders_and_strips
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%a1 = call i8* @lot_of_launders_and_strips(i8* %p)
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%a2 = call i8* @lot_of_launders_and_strips(i8* %a1)
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%a3 = call i8* @lot_of_launders_and_strips(i8* %a2)
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%a4 = call i8* @lot_of_launders_and_strips(i8* %a3)
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ret i8* %a4
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}
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define i8* @lot_of_launders_and_strips(i8* %p) {
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%a1 = call i8* @llvm.launder.invariant.group.p0i8(i8* %p)
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%a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a1)
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%a3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a2)
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%a4 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a3)
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%s1 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a4)
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%s2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %s1)
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%s3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %s2)
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%s4 = call i8* @llvm.strip.invariant.group.p0i8(i8* %s3)
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ret i8* %s4
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}
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declare i8* @llvm.launder.invariant.group.p0i8(i8*)
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declare i8* @llvm.strip.invariant.group.p0i8(i8*)
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