| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=newgvn -S | FileCheck %s |
| |
| ; github issue #56039 |
| define i8 @src(ptr %a, ptr %b, i1 %c) { |
| ; CHECK-LABEL: @src( |
| ; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]] |
| ; CHECK: bb1: |
| ; CHECK-NEXT: [[LB1:%.*]] = load i8, ptr [[B:%.*]], align 1 |
| ; CHECK-NEXT: [[TOBOOL3_NOT_I:%.*]] = icmp eq i8 [[LB1]], 0 |
| ; CHECK-NEXT: br i1 [[TOBOOL3_NOT_I]], label [[BB4:%.*]], label [[BB3:%.*]] |
| ; CHECK: bb2: |
| ; CHECK-NEXT: [[LB2:%.*]] = load i8, ptr [[B]], align 1 |
| ; CHECK-NEXT: [[CMP_NOT_I:%.*]] = icmp ult i8 0, [[LB2]] |
| ; CHECK-NEXT: tail call void @llvm.assume(i1 [[CMP_NOT_I]]) |
| ; CHECK-NEXT: br label [[BB3]] |
| ; CHECK: bb3: |
| ; CHECK-NEXT: [[LA:%.*]] = load i8, ptr [[A:%.*]], align 1 |
| ; CHECK-NEXT: br label [[BB4]] |
| ; CHECK: bb4: |
| ; CHECK-NEXT: ret i8 0 |
| ; |
| br i1 %c, label %bb1, label %bb2 |
| |
| bb1: |
| %lb1 = load i8, ptr %b |
| %tobool3.not.i = icmp eq i8 %lb1, 0 |
| br i1 %tobool3.not.i, label %bb4, label %bb3 |
| |
| bb2: |
| %lb2 = load i8, ptr %b |
| %cmp.not.i = icmp ult i8 0, %lb2 |
| tail call void @llvm.assume(i1 %cmp.not.i) |
| br label %bb3 |
| |
| bb3: |
| %p = phi i8 [ %lb1, %bb1 ], [ %lb2, %bb2 ] |
| %la = load i8, ptr %a |
| %xor = xor i8 %la, %p |
| br label %bb4 |
| |
| bb4: |
| ret i8 0 |
| } |
| |
| declare void @llvm.assume(i1) |
