1 ; RUN: llc < %s -mtriple=x86_64-apple-macosx | 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(...) 29
