replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Add command line option to limit the number splits to help debugging. 

llvm-svn: 58312
This commit is contained in:
Evan Cheng 2008-10-28 01:48:24 +00:00
parent 546200529b
commit 9f854697e4
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
llvm/lib/CodeGen/PreAllocSplitting.cpp
View File

@ -33,7 +33,9 @@
#include <map>
using namespace llvm;
STATISTIC(NumSplit , "Number of intervals split");
static cl::opt<int> PreSplitLimit("pre-split-limit", cl::init(-1), cl::Hidden);
STATISTIC(NumSplits, "Number of intervals split");
namespace {
class VISIBILITY_HIDDEN PreAllocSplitting : public MachineFunctionPass {
@ -607,7 +609,7 @@ bool PreAllocSplitting::SplitRegLiveInterval(LiveInterval *LI) {
// Record val# values are in the specific spill slot.
RecordSplit(CurrLI->reg, SpillIndex, RestoreIndex, SS);
++NumSplit;
++NumSplits;
return true;
}
@ -659,7 +661,7 @@ bool PreAllocSplitting::SplitRegLiveInterval(LiveInterval *LI) {
// Record val# values are in the specific spill slot.
RecordSplit(CurrLI->reg, SpillIndex, RestoreIndex, SS);
++NumSplit;
++NumSplits;
return true;
}
@ -689,6 +691,8 @@ PreAllocSplitting::SplitRegLiveIntervals(const TargetRegisterClass **RCs) {
// Process the affected live intervals.
bool Change = false;
while (!Intervals.empty()) {
if (PreSplitLimit != -1 && (int)NumSplits == PreSplitLimit)
break;
LiveInterval *LI = Intervals.back();
Intervals.pop_back();
Change |= SplitRegLiveInterval(LI);