[PATCH] D48467: [X86] Recognize a splat of negate in isFNEG

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: lib/Target/X86/X86ISelLowering.cpp:36829
 
-  } else if (auto *C = getTargetConstantFromNode(Op1)) {
-    if (C->getType()->isVectorTy()) {
-      if (auto *SplatV = C->getSplatValue())
-        if (isSignMask(cast<ConstantFP>(SplatV)))
+    } else if (BuildVectorSDNode *BV = dyn_cast<BuildVectorSDNode>(Op1)) {
+      if (ConstantFPSDNode *CN = BV->getConstantFPSplatNode())
----------------
auto *BV = dyn_cast<BuildVectorSDNode>(Op1)


================
Comment at: lib/Target/X86/X86ISelLowering.cpp:36834
+
+    } else if (auto *C = getTargetConstantFromNode(Op1)) {
+      if (C->getType()->isVectorTy()) {
----------------
Constant *C


Repository:
  rL LLVM

https://reviews.llvm.org/D48467