[PATCH] D31526: InstCombine: Use the InstSimplify hook for shufflevector
Zvi Rackover via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Apr 3 22:00:34 PDT 2017
This revision was automatically updated to reflect the committed changes.
Closed by commit rL299412: InstCombine: Use the InstSimplify hook for shufflevector (authored by zvi).
Changed prior to commit:
https://reviews.llvm.org/D31526?vs=93604&id=94002#toc
Repository:
rL LLVM
https://reviews.llvm.org/D31526
Files:
llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
Index: llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
===================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -1140,12 +1140,11 @@
SmallVector<int, 16> Mask = SVI.getShuffleMask();
Type *Int32Ty = Type::getInt32Ty(SVI.getContext());
- bool MadeChange = false;
-
- // Undefined shuffle mask -> undefined value.
- if (isa<UndefValue>(SVI.getOperand(2)))
- return replaceInstUsesWith(SVI, UndefValue::get(SVI.getType()));
+ if (auto *V = SimplifyShuffleVectorInst(LHS, RHS, SVI.getMask(),
+ SVI.getType(), DL, &TLI, &DT, &AC))
+ return replaceInstUsesWith(SVI, V);
+ bool MadeChange = false;
unsigned VWidth = SVI.getType()->getVectorNumElements();
APInt UndefElts(VWidth, 0);
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