6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-09-28 06:58:19 +00:00
Code Issues Projects Releases Wiki Activity

Implement DeadStoreElim/alloca.llx by observing that allocas are dead at the

Browse Source 
end of the function (either return or unwind)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15232 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-26 06:14:11 +00:00
parent a00064a383
commit a000279a7d
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/DeadStoreElimination.cpp
View File

@ -66,7 +66,10 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) {
// If this block ends in a return, unwind, and eventually tailcall/barrier,
// then all allocas are dead at its end.
if (BB.getTerminator()->getNumSuccessors() == 0) {
BasicBlock *Entry = BB.getParent()->begin();
for (BasicBlock::iterator I = Entry->begin(), E = Entry->end(); I != E; ++I)
if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
KillLocs.add(AI, ~0);
}
// PotentiallyDeadInsts - Deleting dead stores from the program can make other