66 lines
2.0 KiB
LLVM
66 lines
2.0 KiB
LLVM
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; RUN: opt < %s -basic-aa -dse -enable-dse-memoryssa=false -S | FileCheck %s
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; CHECK-LABEL: void @skipBarrier(i8* %ptr)
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define void @skipBarrier(i8* %ptr) {
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; CHECK-NOT: store i8 42
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store i8 42, i8* %ptr
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; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
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%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
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; CHECK: store i8 43
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store i8 43, i8* %ptr2
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ret void
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}
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; CHECK-LABEL: void @skip2Barriers(i8* %ptr)
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define void @skip2Barriers(i8* %ptr) {
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; CHECK-NOT: store i8 42
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store i8 42, i8* %ptr
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; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
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%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
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; CHECK-NOT: store i8 43
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store i8 43, i8* %ptr2
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%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr2)
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%ptr4 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr3)
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; CHECK: store i8 44
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store i8 44, i8* %ptr4
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ret void
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}
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; CHECK-LABEL: void @skip3Barriers(i8* %ptr)
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define void @skip3Barriers(i8* %ptr) {
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; CHECK-NOT: store i8 42
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store i8 42, i8* %ptr
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; CHECK: %ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
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%ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
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; CHECK-NOT: store i8 43
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store i8 43, i8* %ptr2
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%ptr3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr2)
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%ptr4 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr3)
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; CHECK: store i8 44
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store i8 44, i8* %ptr4
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ret void
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}
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; CHECK-LABEL: void @skip4Barriers(i8* %ptr)
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define void @skip4Barriers(i8* %ptr) {
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; CHECK-NOT: store i8 42
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store i8 42, i8* %ptr
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; CHECK: %ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
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%ptr2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr)
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; CHECK-NOT: store i8 43
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store i8 43, i8* %ptr2
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%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr2)
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%ptr4 = call i8* @llvm.strip.invariant.group.p0i8(i8* %ptr3)
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%ptr5 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr3)
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; CHECK: store i8 44
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store i8 44, i8* %ptr5
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ret void
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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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