6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-03 00:33:09 +00:00
Code Issues Projects Releases Wiki Activity

Speed up -instcombine by 20% by avoiding a particularly expensive passmgr call.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34902 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-03-04 04:27:24 +00:00
parent 55091782c1
commit f964f321eb
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -74,6 +74,7 @@ namespace {
std::vector<Instruction*> Worklist;
DenseMap<Instruction*, unsigned> WorklistMap;
TargetData *TD;
bool MustPreserveLCSSA;
public:
/// AddToWorkList - Add the specified instruction to the worklist if it
/// isn't already in it.
@ -7685,7 +7686,7 @@ static bool DeadPHICycle(PHINode *PN, std::set<PHINode*> &PotentiallyDeadPHIs) {
//
Instruction *InstCombiner::visitPHINode(PHINode &PN) {
// If LCSSA is around, don't mess with Phi nodes
if (mustPreserveAnalysisID(LCSSAID)) return 0;
if (MustPreserveLCSSA) return 0;
if (Value *V = PN.hasConstantValue())
return ReplaceInstUsesWith(PN, V);
@ -9344,6 +9345,8 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
bool InstCombiner::runOnFunction(Function &F) {
MustPreserveLCSSA = mustPreserveAnalysisID(LCSSAID);
bool EverMadeChange = false;
// Iterate while there is work to do.