From: Craig Topper <craig.topper@gmail.com>
Date: Sun, 11 Dec 2016 07:42:06 +0000 (+0000)
Subject: [X86][InstCombine] Teach InstCombineCalls to simplify demanded elements for scalar... 
X-Git-Tag: android-x86-7.1-r4~23377
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=d07981b6344501f1d397cc59e458603c49252458;p=android-x86%2Fexternal-llvm.git

[X86][InstCombine] Teach InstCombineCalls to simplify demanded elements for scalar FMA intrinsics.

These intrinsics don't read the upper bits of their second and third inputs so we can try to simplify them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289372 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index d87ac44b415..73d685ef10a 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1777,6 +1777,14 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
     break;
   }
 
+  case Intrinsic::x86_fma_vfmadd_ss:
+  case Intrinsic::x86_fma_vfmsub_ss:
+  case Intrinsic::x86_fma_vfnmadd_ss:
+  case Intrinsic::x86_fma_vfnmsub_ss:
+  case Intrinsic::x86_fma_vfmadd_sd:
+  case Intrinsic::x86_fma_vfmsub_sd:
+  case Intrinsic::x86_fma_vfnmadd_sd:
+  case Intrinsic::x86_fma_vfnmsub_sd:
   case Intrinsic::x86_avx512_mask_add_ss_round:
   case Intrinsic::x86_avx512_mask_div_ss_round:
   case Intrinsic::x86_avx512_mask_mul_ss_round: