44 lines
1.2 KiB
LLVM
44 lines
1.2 KiB
LLVM
; RUN: opt -scoped-noalias -basicaa -newgvn -S < %s | FileCheck %s
|
|
|
|
define i32 @test1(i32* %p, i32* %q) {
|
|
; CHECK-LABEL: @test1(i32* %p, i32* %q)
|
|
; CHECK: load i32, i32* %p
|
|
; CHECK-NOT: noalias
|
|
; CHECK: %c = add i32 %a, %a
|
|
%a = load i32, i32* %p, !noalias !0
|
|
%b = load i32, i32* %p
|
|
%c = add i32 %a, %b
|
|
ret i32 %c
|
|
}
|
|
|
|
define i32 @test2(i32* %p, i32* %q) {
|
|
; CHECK-LABEL: @test2(i32* %p, i32* %q)
|
|
; CHECK: load i32, i32* %p, !alias.scope !0
|
|
; CHECK: %c = add i32 %a, %a
|
|
%a = load i32, i32* %p, !alias.scope !0
|
|
%b = load i32, i32* %p, !alias.scope !0
|
|
%c = add i32 %a, %b
|
|
ret i32 %c
|
|
}
|
|
|
|
; FIXME: In this case we can do better than intersecting the scopes, and can
|
|
; concatenate them instead. Both loads are in the same basic block, the first
|
|
; makes the second safe to speculatively execute, and there are no calls that may
|
|
; throw in between.
|
|
define i32 @test3(i32* %p, i32* %q) {
|
|
; CHECK-LABEL: @test3(i32* %p, i32* %q)
|
|
; CHECK: load i32, i32* %p, !alias.scope !1
|
|
; CHECK: %c = add i32 %a, %a
|
|
%a = load i32, i32* %p, !alias.scope !1
|
|
%b = load i32, i32* %p, !alias.scope !2
|
|
%c = add i32 %a, %b
|
|
ret i32 %c
|
|
}
|
|
|
|
declare i32 @foo(i32*) readonly
|
|
|
|
!0 = !{!0}
|
|
!1 = !{!1}
|
|
!2 = !{!0, !1}
|
|
|