| Evan Cheng | 7139d35 | 2011-05-12 20:30:01 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -march=x86-64 | FileCheck %s |
| 2 | |
| 3 | ; Common "xorb al, al" instruction in the two successor blocks should be |
| 4 | ; moved to the entry block above the test + je. |
| 5 | |
| 6 | ; rdar://9145558 |
| 7 | |
| 8 | define zeroext i1 @t(i32 %c) nounwind ssp { |
| 9 | entry: |
| 10 | ; CHECK: t: |
| 11 | ; CHECK: xorb %al, %al |
| 12 | ; CHECK: test |
| 13 | ; CHECK: je |
| 14 | %tobool = icmp eq i32 %c, 0 |
| 15 | br i1 %tobool, label %return, label %if.then |
| 16 | |
| 17 | if.then: |
| 18 | ; CHECK: callq |
| 19 | %call = tail call zeroext i1 (...)* @foo() nounwind |
| 20 | br label %return |
| 21 | |
| 22 | return: |
| 23 | ; CHECK: ret |
| 24 | %retval.0 = phi i1 [ %call, %if.then ], [ false, %entry ] |
| 25 | ret i1 %retval.0 |
| 26 | } |
| 27 | |
| 28 | declare zeroext i1 @foo(...) |