6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-21 02:24:22 +00:00
Code Issues Projects Releases Wiki Activity

SimplifyCFG has a heuristics for out-of-order processors that decides when it is worthwhile to merge branches. It tries to estimate if the operands of the instruction that we want to hoist are ready. This commit marks function arguments as 'ready' because they require no calculation. This boosts libquantum and a few other workloads from the testsuite.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194346 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2013-11-10 04:13:31 +00:00
parent 20f1fe5c50
commit 30150a128c
2 changed files with 29 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@ -2096,7 +2096,7 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI) {
for (Instruction::op_iterator OI = BonusInst->op_begin(),
OE = BonusInst->op_end(); OI != OE; ++OI) {
Value *V = *OI;
if (!isa<Constant>(V))
if (!isa<Constant>(V) && !isa<Argument>(V))
UsedValues.insert(V);
}