| ; 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} |
| |