6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-15 04:30:12 +00:00
Code Issues Projects Releases Wiki Activity

Commented out code so that copies are inserted for all phi args

Browse Source 
CahedCopyMap was disabled to insert phi elimination code for all phi args


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1105 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ruchira Sasanka 2001-11-03 17:09:59 +00:00
parent 0f279b245d
commit fca59d7dc9
1 changed files with 19 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
lib/Transforms/HoistPHIConstants.cpp
View File

@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/HoistPHIConstants.h"
#include "llvm/iOther.h"
#include "llvm/BasicBlock.h"
@ -18,15 +21,20 @@ typedef map<BBConstTy, CastInst *> CachedCopyMap;
static Value *NormalizePhiOperand(PHINode *PN, Value *CPV,
BasicBlock *Pred, CachedCopyMap &CopyCache) {
/* NOTE: CahedCopyMap was disabled to insert phi elimination code
for all phi args -- Ruchira
*/
// Check if we've already inserted a copy for this constant in Pred
// Note that `copyCache[Pred]' will create an empty vector the first time
//
CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
if (CCI != CopyCache.end()) return CCI->second;
//CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
//if (CCI != CopyCache.end()) return CCI->second;
// Create a copy instruction and add it to the cache...
CastInst *Inst = new CastInst(CPV, CPV->getType());
CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
//CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
// Insert the copy just before the terminator inst of the predecessor BB
assert(Pred->getTerminator() && "Degenerate BB encountered!");
@ -52,11 +60,14 @@ bool HoistPHIConstants::doHoistPHIConstants(Method *M) {
PHINode *PN = cast<PHINode>(Inst);
for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) {
Value *Op = PN->getIncomingValue(i);
if (isa<ConstPoolVal>(Op)) {
PN->setIncomingValue(i,
NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
Changed = true;
}
//if (isa<ConstPoolVal>(Op)) { --- Do for all phi args -- Ruchira
PN->setIncomingValue(i,
NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
Changed = true;
//}
}
}