[PATCH] D71637: [PatternMatch] Add support for matching ConstantExpr.

[Huihui Zhang via Phabricator via llvm-commits]

huihuiz created this revision.
huihuiz added reviewers: sdesmalen, huntergr, spatel, lebedev.ri, apazos, efriedma, willlovett.
huihuiz added a project: LLVM.

Motivated in D71389 <https://reviews.llvm.org/D71389>. For scalable vector type, constant folding
will be applied on ConstantExprs. It would be usefull to support
pattern matcher for ConstantExprs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71637

Files:
  llvm/include/llvm/IR/PatternMatch.h


Index: llvm/include/llvm/IR/PatternMatch.h
===================================================================
--- llvm/include/llvm/IR/PatternMatch.h
+++ llvm/include/llvm/IR/PatternMatch.h
@@ -1235,6 +1235,9 @@
       return Op1.match(I->getOperand(0)) && Op2.match(I->getOperand(1)) &&
              Op3.match(I->getOperand(2));
     }
+    if (auto *CE = dyn_cast<ConstantExpr>(V))
+      return (CE->getOpcode() == Opcode) && Op1.match(CE->getOperand(0)) &&
+             Op2.match(CE->getOperand(1)) && Op3.match(CE->getOperand(2));
     return false;
   }
 };


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