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