replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Do not count debugger intrinsics in size estimation. 

llvm-svn: 18110
This commit is contained in:
Chris Lattner 2004-11-22 17:23:57 +00:00
parent 79e87e39eb
commit 540e5f92b4
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
llvm/lib/Transforms/Scalar/TailDuplication.cpp
View File

@ -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