Changes in directory llvm/lib/Analysis:
ScalarEvolutionExpander.cpp updated: 1.18 -> 1.19
---
Log message:
Fold a binary operator with constant operands when expanding code for a SCEV.
---
Diffs of the changes: (+5 -0)
ScalarEvolutionExpander.cpp | 5 +++++
1 files changed, 5 insertions(+)
Index: llvm/lib/Analysis/ScalarEvolutionExpander.cpp
diff -u llvm/lib/Analysis/ScalarEvolutionExpander.cpp:1.18
llvm/lib/Analysis/ScalarEvolutionExpander.cpp:1.19
--- llvm/lib/Analysis/ScalarEvolutionExpander.cpp:1.18 Fri Jun 15 09:38:12 2007
+++ llvm/lib/Analysis/ScalarEvolutionExpander.cpp Fri Jun 15 14:21:55 2007
@@ -72,6 +72,11 @@
/// of work to avoid inserting an obviously redundant operation.
Value *SCEVExpander::InsertBinop(Instruction::BinaryOps Opcode, Value *LHS,
Value *RHS, Instruction *&InsertPt) {
+ // Fold a binop with constant operands.
+ if (Constant *CLHS = dyn_cast<Constant>(LHS))
+ if (Constant *CRHS = dyn_cast<Constant>(RHS))
+ return ConstantExpr::get(Opcode, CLHS, CRHS);
+
// Do a quick scan to see if we have this binop nearby. If so, reuse it.
unsigned ScanLimit = 6;
for (BasicBlock::iterator IP = InsertPt, E = InsertPt->getParent()->begin();
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