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llvm-mirror/test/CodeGen/X86/testb-je-fusion.ll
Akira Hatanaka fc40b8c4ea [X86] Mark pseudo instruction TEST8ri_NOEREX as hasSIdeEffects=0.
Also, add a case clause in X86InstrInfo::shouldScheduleAdjacent to enable
macro-fusion.

<rdar://problem/15680770>

llvm-svn: 212747
2014-07-10 18:00:53 +00:00

21 lines
459 B
LLVM

; RUN: llc < %s -march=x86-64 -mcpu=corei7-avx | FileCheck %s
; testb should be scheduled right before je to enable macro-fusion.
; CHECK: testb $2, %{{[abcd]}}h
; CHECK-NEXT: je
define i32 @check_flag(i32 %flags, ...) nounwind {
entry:
%and = and i32 %flags, 512
%tobool = icmp eq i32 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then:
br label %if.end
if.end:
%hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ]
ret i32 %hasflag
}