| ; Test that PHI nodes and select instructions do not necessarily make stuff |
| ; non-constant. |
| |
| ; RUN: opt < %s -passes=globalopt -S | FileCheck %s |
| ; CHECK-NOT: global |
| |
| @X = internal global i32 4 ; <i32*> [#uses=2] |
| @Y = internal global i32 5 ; <i32*> [#uses=2] |
| |
| define i32 @test1(i1 %C) { |
| %P = select i1 %C, i32* @X, i32* @Y ; <i32*> [#uses=1] |
| %V = load i32, i32* %P ; <i32> [#uses=1] |
| ret i32 %V |
| } |
| |
| define i32 @test2(i1 %C) { |
| ; <label>:0 |
| br i1 %C, label %T, label %Cont |
| |
| T: ; preds = %0 |
| br label %Cont |
| |
| Cont: ; preds = %T, %0 |
| %P = phi i32* [ @X, %0 ], [ @Y, %T ] ; <i32*> [#uses=1] |
| %V = load i32, i32* %P ; <i32> [#uses=1] |
| ret i32 %V |
| } |