mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-27 05:26:07 +00:00
104 lines
3.5 KiB
LLVM
104 lines
3.5 KiB
LLVM
; RUN: opt -S -passes=early-cse -earlycse-debug-hash < %s | FileCheck %s
|
|
; RUN: opt -S -passes=gvn < %s | FileCheck %s
|
|
; RUN: opt -S -passes=newgvn < %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, ptr %ptr, !invariant.group !0
|
|
; CHECK: call ptr @llvm.launder.invariant.group.p0
|
|
%ptr2 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
; FIXME: This one could be CSE
|
|
; CHECK: call ptr @llvm.launder.invariant.group
|
|
%ptr3 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
; CHECK: call void @clobber(ptr {{.*}}%ptr)
|
|
call void @clobber(ptr %ptr)
|
|
|
|
; CHECK: call void @use(ptr {{.*}}%ptr2)
|
|
call void @use(ptr %ptr2)
|
|
; CHECK: call void @use(ptr {{.*}}%ptr3)
|
|
call void @use(ptr %ptr3)
|
|
; CHECK: load i8, ptr %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, ptr %ptr3, !invariant.group !0
|
|
|
|
ret i8 %v
|
|
}
|
|
|
|
; CHECK-LABEL: define i8 @unoptimizable()
|
|
define i8 @unoptimizable() {
|
|
entry:
|
|
%ptr = alloca i8
|
|
store i8 42, ptr %ptr, !invariant.group !0
|
|
; CHECK: call ptr @llvm.launder.invariant.group.p0
|
|
%ptr2 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
call void @clobber(ptr %ptr)
|
|
; CHECK: call ptr @llvm.launder.invariant.group.p0
|
|
%ptr3 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
; CHECK: call void @clobber(ptr {{.*}}%ptr)
|
|
call void @clobber(ptr %ptr)
|
|
; CHECK: call void @use(ptr {{.*}}%ptr2)
|
|
call void @use(ptr %ptr2)
|
|
; CHECK: call void @use(ptr {{.*}}%ptr3)
|
|
call void @use(ptr %ptr3)
|
|
; CHECK: load i8, ptr %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, ptr %ptr3, !invariant.group !0
|
|
|
|
ret i8 %v
|
|
}
|
|
|
|
; CHECK-LABEL: define i8 @unoptimizable2()
|
|
define i8 @unoptimizable2() {
|
|
%ptr = alloca i8
|
|
store i8 42, ptr %ptr, !invariant.group !0
|
|
; CHECK: call ptr @llvm.launder.invariant.group
|
|
%ptr2 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
store i8 43, ptr %ptr
|
|
; CHECK: call ptr @llvm.launder.invariant.group
|
|
%ptr3 = call ptr @llvm.launder.invariant.group.p0(ptr %ptr)
|
|
; CHECK: call void @clobber(ptr {{.*}}%ptr)
|
|
call void @clobber(ptr %ptr)
|
|
; CHECK: call void @use(ptr {{.*}}%ptr2)
|
|
call void @use(ptr %ptr2)
|
|
; CHECK: call void @use(ptr {{.*}}%ptr3)
|
|
call void @use(ptr %ptr3)
|
|
; CHECK: load i8, ptr %ptr3, {{.*}}!invariant.group
|
|
%v = load i8, ptr %ptr3, !invariant.group !0
|
|
ret i8 %v
|
|
}
|
|
|
|
; This test check if optimizer is not proving equality based on mustalias
|
|
; CHECK-LABEL: define void @dontProveEquality(ptr %a)
|
|
define void @dontProveEquality(ptr %a) {
|
|
%b = call ptr @llvm.launder.invariant.group.p0(ptr %a)
|
|
%r = icmp eq ptr %b, %a
|
|
; CHECK: call void @useBool(i1 %r)
|
|
call void @useBool(i1 %r)
|
|
|
|
%b2 = call ptr @llvm.strip.invariant.group.p0(ptr %a)
|
|
%r2 = icmp eq ptr %b2, %a
|
|
; CHECK: call void @useBool(i1 %r2)
|
|
call void @useBool(i1 %r2)
|
|
|
|
ret void
|
|
}
|
|
|
|
declare void @use(ptr readonly)
|
|
declare void @useBool(i1)
|
|
|
|
declare void @clobber(ptr)
|
|
; CHECK: Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(inaccessiblemem: readwrite){{$}}
|
|
; CHECK-NEXT: declare ptr @llvm.launder.invariant.group.p0(ptr)
|
|
declare ptr @llvm.launder.invariant.group.p0(ptr)
|
|
|
|
; CHECK: Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none){{$}}
|
|
; CHECK-NEXT: declare ptr @llvm.strip.invariant.group.p0(ptr)
|
|
declare ptr @llvm.strip.invariant.group.p0(ptr)
|
|
|
|
|
|
!0 = !{}
|