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Do not count debugger intrinsics in size estimation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18110 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-11-22 17:23:57 +00:00
parent 8db93f18cc
commit b9df9b4c88
1 changed files with 6 additions and 2 deletions
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8
lib/Transforms/Scalar/TailDuplication.cpp
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@ -22,6 +22,7 @@
#include "llvm/Constant.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
#include "llvm/Support/CFG.h"
@ -107,8 +108,11 @@ bool TailDup::shouldEliminateUnconditionalBranch(TerminatorInst *TI) {
BasicBlock::iterator I = Dest->begin();
while (isa<PHINode>(*I)) ++I;
for (unsigned Size = 0; I != Dest->end(); ++Size, ++I)
if (Size == Threshold) return false; // The block is too large...
for (unsigned Size = 0; I != Dest->end(); ++I) {
if (Size == Threshold) return false; // The block is too large.
// Only count instructions that are not debugger intrinsics.
if (!isa<DbgInfoIntrinsic>(I)) ++Size;
}
// Do not tail duplicate a block that has thousands of successors into a block
// with a single successor if the block has many other predecessors. This can