| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=newgvn -S | FileCheck %s |
| |
| define i32 @main(ptr %p, i32 %x, i32 %y) { |
| ; CHECK-LABEL: @main( |
| ; CHECK-NEXT: block1: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[BLOCK2:%.*]], label [[BLOCK3:%.*]] |
| ; CHECK: block2: |
| ; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P:%.*]] |
| ; CHECK-NEXT: br label [[BLOCK4:%.*]] |
| ; CHECK: block3: |
| ; CHECK-NEXT: [[B:%.*]] = load ptr, ptr [[P]] |
| ; CHECK-NEXT: br label [[BLOCK4]] |
| ; CHECK: block4: |
| ; CHECK-NEXT: [[EXISTINGPHI:%.*]] = phi ptr [ [[A]], [[BLOCK2]] ], [ [[B]], [[BLOCK3]] ] |
| ; CHECK-NEXT: [[C:%.*]] = load i32, ptr [[EXISTINGPHI]] |
| ; CHECK-NEXT: [[E:%.*]] = add i32 [[C]], [[C]] |
| ; CHECK-NEXT: ret i32 [[E]] |
| ; |
| block1: |
| %cmp = icmp eq i32 %x, %y |
| br i1 %cmp , label %block2, label %block3 |
| |
| block2: |
| %a = load ptr, ptr %p |
| br label %block4 |
| |
| block3: |
| %b = load ptr, ptr %p |
| br label %block4 |
| |
| block4: |
| %existingPHI = phi ptr [ %a, %block2 ], [ %b, %block3 ] |
| %DEAD = load ptr, ptr %p |
| %c = load i32, ptr %DEAD |
| %d = load i32, ptr %existingPHI |
| %e = add i32 %c, %d |
| ret i32 %e |
| } |