Removed the VMLxForwarding feature for the Cortex-A15 target.

llvm-svn: 164030

llvm/lib/Target/ARM/ARM.td

@@ -142,8 +142,7 @@ def ProcA9      : SubtargetFeature<"a9", "ARMProcFamily", "CortexA9",
 // FIXME: It has not been determined if A15 has these features.
 def ProcA15      : SubtargetFeature<"a15", "ARMProcFamily", "CortexA15",
                                    "Cortex-A15 ARM processors",
-                                   [FeatureVMLxForwarding,
-                                    FeatureT2XtPk, FeatureFP16,
+                                   [FeatureT2XtPk, FeatureFP16,
                                     FeatureAvoidPartialCPSR]>;
 
 class ProcNoItin<string Name, list<SubtargetFeature> Features>

llvm/test/CodeGen/ARM/a15-mla.ll

@@ -0,0 +1,12 @@
+; RUN: llc < %s  -march=arm -float-abi=hard -mcpu=cortex-a15 -mattr=+neon,+neonfp | FileCheck %s
+
+; This test checks that the VMLxForwarting feature is disabled for A15.
+; CHECK: fun_a
+define <4 x i32> @fun_a(<4 x i32> %x, <4 x i32> %y) nounwind{
+  %1 = add <4 x i32> %x, %y
+; CHECK-NOT: vmul
+; CHECK: vmla
+  %2 = mul <4 x i32> %1, %1
+  %3 = add <4 x i32> %y, %2
+  ret <4 x i32> %3
+}