| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -simplifycfg -S < %s | FileCheck %s |
| 2 | |
| 3 | declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1 |
| 4 | |
| 5 | define i32 @f(i32 %a, i32 %b) #0 { |
| 6 | entry: |
| 7 | %uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) |
| 8 | %cmp = extractvalue { i32, i1 } %uadd, 1 |
| 9 | br i1 %cmp, label %return, label %if.end |
| 10 | |
| 11 | if.end: ; preds = %entry |
| 12 | %0 = extractvalue { i32, i1 } %uadd, 0 |
| 13 | br label %return |
| 14 | |
| 15 | return: ; preds = %entry, %if.end |
| 16 | %retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ] |
| 17 | ret i32 %retval.0 |
| 18 | |
| 19 | ; CHECK-LABEL: @f( |
| 20 | ; CHECK-NOT: phi |
| 21 | ; CHECK: select |
| 22 | } |