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Small tweak to inline cost computation. Ext of i/fcmp results are mostly optimized away in codegen.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93453 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-01-14 21:04:31 +00:00
parent f4b6d88cda
commit 1a67dd2d47
1 changed files with 6 additions and 1 deletions
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7
lib/Analysis/InlineCost.cpp
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@ -167,11 +167,16 @@ void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB) {
if (isa<ExtractElementInst>(II) || isa<VectorType>(II->getType()))
++NumVectorInsts;
// Noop casts, including ptr <-> int, don't count.
if (const CastInst *CI = dyn_cast<CastInst>(II)) {
// Noop casts, including ptr <-> int, don't count.
if (CI->isLosslessCast() || isa<IntToPtrInst>(CI) ||
isa<PtrToIntInst>(CI))
continue;
// Result of a cmp instruction is often extended (to be used by other
// cmp instructions, logical or return instructions). These are usually
// nop on most sane targets.
if (isa<CmpInst>(CI->getOperand(0)))
continue;
} else if (const GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(II)){
// If a GEP has all constant indices, it will probably be folded with
// a load/store.