| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; This testcases makes sure that mem2reg can handle unreachable blocks. |
| ; RUN: opt < %s -passes=mem2reg -S | FileCheck %s |
| |
| define i32 @test() { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: Loop: |
| ; CHECK-NEXT: br label [[ENDOFLOOP:%.*]] |
| ; CHECK: Unreachable: |
| ; CHECK-NEXT: br label [[ENDOFLOOP]] |
| ; CHECK: EndOfLoop: |
| ; CHECK-NEXT: br label [[LOOP]] |
| ; |
| %X = alloca i32 ; <ptr> [#uses=2] |
| store i32 6, ptr %X |
| br label %Loop |
| Loop: ; preds = %EndOfLoop, %0 |
| store i32 5, ptr %X |
| br label %EndOfLoop |
| Unreachable: ; No predecessors! |
| br label %EndOfLoop |
| EndOfLoop: ; preds = %Unreachable, %Loop |
| br label %Loop |
| } |
| |
