mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
a62270de2c
The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
60 lines
1.8 KiB
LLVM
60 lines
1.8 KiB
LLVM
; Test to make sure llvm.invariant.start calls are not treated as clobbers.
|
|
; RUN: opt < %s -gvn -S | FileCheck %s
|
|
|
|
|
|
declare {}* @llvm.invariant.start.p0i8(i64, i8* nocapture) nounwind readonly
|
|
declare void @llvm.invariant.end.p0i8({}*, i64, i8* nocapture) nounwind
|
|
|
|
; We forward store to the load across the invariant.start intrinsic
|
|
define i8 @forward_store() {
|
|
; CHECK-LABEL: @forward_store
|
|
; CHECK: call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8 0
|
|
%a = alloca i8
|
|
store i8 0, i8* %a
|
|
%i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
%r = load i8, i8* %a
|
|
ret i8 %r
|
|
}
|
|
|
|
declare i8 @dummy(i8* nocapture) nounwind readonly
|
|
|
|
; We forward store to the load in the non-local analysis case,
|
|
; i.e. invariant.start is in another basic block.
|
|
define i8 @forward_store_nonlocal(i1 %cond) {
|
|
; CHECK-LABEL: forward_store_nonlocal
|
|
; CHECK: call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
; CHECK: ret i8 0
|
|
; CHECK: ret i8 %val
|
|
%a = alloca i8
|
|
store i8 0, i8* %a
|
|
%i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
br i1 %cond, label %loadblock, label %exit
|
|
|
|
loadblock:
|
|
%r = load i8, i8* %a
|
|
ret i8 %r
|
|
|
|
exit:
|
|
%val = call i8 @dummy(i8* %a)
|
|
ret i8 %val
|
|
}
|
|
|
|
; We should not value forward %foo to the invariant.end corresponding to %bar.
|
|
define i8 @forward_store1() {
|
|
; CHECK-LABEL: forward_store1
|
|
; CHECK: %foo = call {}* @llvm.invariant.start.p0i8
|
|
; CHECK-NOT: load
|
|
; CHECK: %bar = call {}* @llvm.invariant.start.p0i8
|
|
; CHECK: call void @llvm.invariant.end.p0i8({}* %bar, i64 1, i8* %a)
|
|
; CHECK: ret i8 0
|
|
%a = alloca i8
|
|
store i8 0, i8* %a
|
|
%foo = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
%r = load i8, i8* %a
|
|
%bar = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %a)
|
|
call void @llvm.invariant.end.p0i8({}* %bar, i64 1, i8* %a)
|
|
ret i8 %r
|
|
}
|