maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Don't count DebugInfo instructions in another limit 

(lest they affect codegen).

llvm-svn: 65915
This commit is contained in:
Dale Johannesen 2009-03-03 01:43:03 +00:00
parent 8dc671cdc9
commit 0192552340
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -11439,12 +11439,18 @@ Instruction *InstCombiner::visitStoreInst(StoreInst &SI) {
SI.getAlignment()))
SI.setAlignment(KnownAlign);
// Do really simple DSE, to catch cases where there are several consequtive
// Do really simple DSE, to catch cases where there are several consecutive
// stores to the same location, separated by a few arithmetic operations. This
// situation often occurs with bitfield accesses.
BasicBlock::iterator BBI = &SI;
for (unsigned ScanInsts = 6; BBI != SI.getParent()->begin() && ScanInsts;
--ScanInsts) {
// Don't count debug info directives, lest they affect codegen.
if (isa<DbgInfoIntrinsic>(BBI)) {
ScanInsts++;
--BBI;
continue;
}
--BBI;
if (StoreInst *PrevSI = dyn_cast<StoreInst>(BBI)) {