forked from OSchip/llvm-project
95 lines
3.1 KiB
LLVM
95 lines
3.1 KiB
LLVM
; RUN: opt -S -early-cse < %s | FileCheck %s
|
|
; RUN: opt -S -gvn < %s | FileCheck %s
|
|
; RUN: opt -S -newgvn < %s | FileCheck %s
|
|
; RUN: opt -S -O3 < %s | FileCheck %s
|
|
|
|
; These tests checks if passes with CSE functionality can do CSE on
|
|
; launder.invariant.group, that is prohibited if there is a memory clobber
|
|
; between barriers call.
|
|
|
|
; CHECK-LABEL: define i8 @optimizable()
|
|
define i8 @optimizable() {
|
|
entry:
|
|
%ptr = alloca i8
|
|
store i8 42, i8* %ptr, !invariant.group !0
|
|
; CHECK: call i8* @llvm.launder.invariant.group.p0i8
|
|
%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
; FIXME: This one could be CSE
|
|
; CHECK: call i8* @llvm.launder.invariant.group
|
|
%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
; CHECK: call void @clobber(i8* {{.*}}%ptr)
|
|
call void @clobber(i8* %ptr)
|
|
|
|
; CHECK: call void @use(i8* {{.*}}%ptr2)
|
|
call void @use(i8* %ptr2)
|
|
; CHECK: call void @use(i8* {{.*}}%ptr3)
|
|
call void @use(i8* %ptr3)
|
|
; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, i8* %ptr3, !invariant.group !0
|
|
|
|
ret i8 %v
|
|
}
|
|
|
|
; CHECK-LABEL: define i8 @unoptimizable()
|
|
define i8 @unoptimizable() {
|
|
entry:
|
|
%ptr = alloca i8
|
|
store i8 42, i8* %ptr, !invariant.group !0
|
|
; CHECK: call i8* @llvm.launder.invariant.group.p0i8
|
|
%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
call void @clobber(i8* %ptr)
|
|
; CHECK: call i8* @llvm.launder.invariant.group.p0i8
|
|
%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
; CHECK: call void @clobber(i8* {{.*}}%ptr)
|
|
call void @clobber(i8* %ptr)
|
|
; CHECK: call void @use(i8* {{.*}}%ptr2)
|
|
call void @use(i8* %ptr2)
|
|
; CHECK: call void @use(i8* {{.*}}%ptr3)
|
|
call void @use(i8* %ptr3)
|
|
; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, i8* %ptr3, !invariant.group !0
|
|
|
|
ret i8 %v
|
|
}
|
|
|
|
; CHECK-LABEL: define i8 @unoptimizable2()
|
|
define i8 @unoptimizable2() {
|
|
%ptr = alloca i8
|
|
store i8 42, i8* %ptr, !invariant.group !0
|
|
; CHECK: call i8* @llvm.launder.invariant.group
|
|
%ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
store i8 43, i8* %ptr
|
|
; CHECK: call i8* @llvm.launder.invariant.group
|
|
%ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
|
|
; CHECK: call void @clobber(i8* {{.*}}%ptr)
|
|
call void @clobber(i8* %ptr)
|
|
; CHECK: call void @use(i8* {{.*}}%ptr2)
|
|
call void @use(i8* %ptr2)
|
|
; CHECK: call void @use(i8* {{.*}}%ptr3)
|
|
call void @use(i8* %ptr3)
|
|
; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, i8* %ptr3, !invariant.group !0
|
|
ret i8 %v
|
|
}
|
|
|
|
; This test check if optimizer is not proving equality based on mustalias
|
|
; CHECK-LABEL: define void @dontProveEquality(i8* %a)
|
|
define void @dontProveEquality(i8* %a) {
|
|
%b = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
|
|
%r = icmp eq i8* %b, %a
|
|
;CHECK: call void @useBool(i1 %r)
|
|
call void @useBool(i1 %r)
|
|
ret void
|
|
}
|
|
|
|
declare void @use(i8* readonly)
|
|
declare void @useBool(i1)
|
|
|
|
declare void @clobber(i8*)
|
|
; CHECK: Function Attrs: inaccessiblememonly nounwind speculatable{{$}}
|
|
; CHECK-NEXT: declare i8* @llvm.launder.invariant.group.p0i8(i8*)
|
|
declare i8* @llvm.launder.invariant.group.p0i8(i8*)
|
|
|
|
!0 = !{}
|
|
|