| ; RUN: opt < %s -gvn -enable-pre -S | FileCheck %s |
| |
| @H = common global i32 0 |
| @G = common global i32 0 |
| |
| define i32 @test1(i1 %cond, i32 %v) nounwind { |
| ; CHECK-LABEL: @test1 |
| entry: |
| br i1 %cond, label %bb, label %bb1 |
| |
| bb: |
| %add.1 = add nuw nsw i32 %v, 42 |
| ; CHECK: %add.1 = add i32 %v, 42 |
| store i32 %add.1, i32* @G, align 4 |
| br label %return |
| |
| bb1: |
| ; CHECK: %.pre = add i32 %v, 42 |
| br label %return |
| |
| return: |
| ; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ] |
| ; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4 |
| ; CHECK-NEXT: ret i32 0 |
| %add.2 = add i32 %v, 42 |
| store i32 %add.2, i32* @H, align 4 |
| ret i32 0 |
| } |
| |
| define i32 @test2(i1 %cond, i32 %v) nounwind { |
| ; CHECK-LABEL: @test2 |
| entry: |
| br i1 %cond, label %bb, label %bb1 |
| |
| bb: |
| %add.1 = add i32 %v, 42 |
| ; CHECK: %add.1 = add i32 %v, 42 |
| store i32 %add.1, i32* @G, align 4 |
| br label %return |
| |
| bb1: |
| ; CHECK: %.pre = add nuw nsw i32 %v, 42 |
| br label %return |
| |
| return: |
| ; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ] |
| ; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4 |
| ; CHECK-NEXT: ret i32 0 |
| %add.2 = add nuw nsw i32 %v, 42 |
| store i32 %add.2, i32* @H, align 4 |
| ret i32 0 |
| } |