Allow generation of vmla.f32 instructions when targeting Cortex-A15. The patch also adds the VFP4 feature to Cortex-A15 and fixes the DontUseFusedMAC predicate so that we can still generate vmla.f32 instructions on non-darwin targets with VFP4.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187349 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 25 insertions, 1 deletions

diff --git a/test/CodeGen/ARM/a15-mla.ll b/test/CodeGen/ARM/a15-mla.ll
index 25f6de4..b233cc2 100644
--- a/test/CodeGen/ARM/a15-mla.ll
+++ b/test/CodeGen/ARM/a15-mla.ll
@@ -1,7 +1,7 @@
 ; 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
+; 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
@@ -10,3 +10,27 @@ define <4 x i32> @fun_a(<4 x i32> %x, <4 x i32> %y) nounwind{
   %3 = add <4 x i32> %y, %2
   ret <4 x i32> %3
 }
+
+; This tests checks that VMLA FP patterns can be matched in instruction selection when targeting
+; Cortex-A15.
+; CHECK: fun_b:
+define <4 x float> @fun_b(<4 x float> %x, <4 x float> %y, <4 x float> %z) nounwind{
+; CHECK: vmla.f32
+  %t = fmul <4 x float> %x, %y
+  %r = fadd <4 x float> %t, %z
+  ret <4 x float> %r
+}
+
+; This tests checks that FP VMLA instructions are not expanded into separate multiply/addition
+; operations when targeting Cortex-A15.
+; CHECK: fun_c:
+define <4 x float> @fun_c(<4 x float> %x, <4 x float> %y, <4 x float> %z, <4 x float> %u, <4 x float> %v) nounwind{
+; CHECK: vmla.f32
+  %t1 = fmul <4 x float> %x, %y
+  %r1 = fadd <4 x float> %t1, %z
+; CHECK: vmla.f32
+  %t2 = fmul <4 x float> %u, %v
+  %r2 = fadd <4 x float> %t2, %r1
+  ret <4 x float> %r2
+}
+