| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -simplifycfg < %s -S | FileCheck %s |
| |
| ; The dead code would cause a select that had itself |
| ; as an operand to be analyzed. This would then cause |
| ; infinite recursion and eventual crash. |
| |
| define void @PR36045(i1 %t, i32* %b) { |
| ; CHECK-LABEL: @PR36045( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[TMP0:%.*]] = xor i1 [[T:%.*]], true |
| ; CHECK-NEXT: call void @llvm.assume(i1 [[TMP0]]) |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br i1 %t, label %if, label %end |
| |
| if: |
| br i1 %t, label %unreach, label %pre |
| |
| unreach: |
| unreachable |
| |
| pre: |
| %p = phi i32 [ 70, %if ], [ %sel, %for ] |
| br label %for |
| |
| for: |
| %cmp = icmp sgt i32 %p, 8 |
| %add = add i32 %p, 2 |
| %sel = select i1 %cmp, i32 %p, i32 %add |
| %cmp21 = icmp ult i32 %sel, 21 |
| br i1 %cmp21, label %pre, label %for.end |
| |
| for.end: |
| br i1 %t, label %unreach2, label %then12 |
| |
| then12: |
| store i32 0, i32* %b |
| br label %unreach2 |
| |
| unreach2: |
| %spec = phi i32 [ %sel, %for.end ], [ 42, %then12 ] |
| unreachable |
| |
| end: |
| ret void |
| } |
| |