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 8define zeroext i1 @t(i32 %c) nounwind ssp { 9entry: 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 17if.then: 18; CHECK: callq 19 %call = tail call zeroext i1 (...)* @foo() nounwind 20 br label %return 21 22return: 23; CHECK: ret 24 %retval.0 = phi i1 [ %call, %if.then ], [ false, %entry ] 25 ret i1 %retval.0 26} 27 28declare zeroext i1 @foo(...) 29