[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
diff --git a/llvm/test/CodeGen/X86/testb-je-fusion.ll b/llvm/test/CodeGen/X86/testb-je-fusion.ll
new file mode 100644
index 0000000..9e946ae
--- /dev/null
+++ b/llvm/test/CodeGen/X86/testb-je-fusion.ll
@@ -0,0 +1,20 @@
+; 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
+}