mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-24 21:42:54 +02:00
32 lines
815 B
LLVM
32 lines
815 B
LLVM
; Test if the !invariant.load metadata is maintained by GVN.
|
|
; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
|
|
|
|
define i32 @test1(i32* nocapture %p, i8* nocapture %q) {
|
|
; CHECK-LABEL: test1
|
|
; CHECK: %x = load i32* %p, align 4, !invariant.load !0
|
|
; CHECK-NOT: %y = load
|
|
entry:
|
|
%x = load i32* %p, align 4, !invariant.load !0
|
|
%conv = trunc i32 %x to i8
|
|
store i8 %conv, i8* %q, align 1
|
|
%y = load i32* %p, align 4, !invariant.load !0
|
|
%add = add i32 %y, 1
|
|
ret i32 %add
|
|
}
|
|
|
|
define i32 @test2(i32* nocapture %p, i8* nocapture %q) {
|
|
; CHECK-LABEL: test2
|
|
; CHECK-NOT: !invariant.load
|
|
; CHECK-NOT: %y = load
|
|
entry:
|
|
%x = load i32* %p, align 4
|
|
%conv = trunc i32 %x to i8
|
|
store i8 %conv, i8* %q, align 1
|
|
%y = load i32* %p, align 4, !invariant.load !0
|
|
%add = add i32 %y, 1
|
|
ret i32 %add
|
|
}
|
|
|
|
!0 = metadata !{ }
|
|
|