6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-06 09:44:39 +00:00
Code Issues Projects Releases Wiki Activity

[LoopAccesses] Improve debug output

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235238 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adam Nemet 2015-04-17 22:43:10 +00:00
parent 9d74bda3e3
commit ee5f9c6278
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
lib/Analysis/LoopAccessAnalysis.cpp
View File

@ -890,14 +890,20 @@ void MemoryDepChecker::Dependence::print(
}
bool LoopAccessInfo::canAnalyzeLoop() {
// We need to have a loop header.
DEBUG(dbgs() << "LAA: Found a loop: " <<
TheLoop->getHeader()->getName() << '\n');
// We can only analyze innermost loops.
if (!TheLoop->empty()) {
DEBUG(dbgs() << "LAA: loop is not the innermost loop\n");
emitAnalysis(LoopAccessReport() << "loop is not the innermost loop");
return false;
}
// We must have a single backedge.
if (TheLoop->getNumBackEdges() != 1) {
DEBUG(dbgs() << "LAA: loop control flow is not understood by analyzer\n");
emitAnalysis(
LoopAccessReport() <<
"loop control flow is not understood by analyzer");
@ -906,6 +912,7 @@ bool LoopAccessInfo::canAnalyzeLoop() {
// We must have a single exiting block.
if (!TheLoop->getExitingBlock()) {
DEBUG(dbgs() << "LAA: loop control flow is not understood by analyzer\n");
emitAnalysis(
LoopAccessReport() <<
"loop control flow is not understood by analyzer");
@ -916,16 +923,13 @@ bool LoopAccessInfo::canAnalyzeLoop() {
// checked at the end of each iteration. With that we can assume that all
// instructions in the loop are executed the same number of times.
if (TheLoop->getExitingBlock() != TheLoop->getLoopLatch()) {
DEBUG(dbgs() << "LAA: loop control flow is not understood by analyzer\n");
emitAnalysis(
LoopAccessReport() <<
"loop control flow is not understood by analyzer");
return false;
}
// We need to have a loop header.
DEBUG(dbgs() << "LAA: Found a loop: " <<
TheLoop->getHeader()->getName() << '\n');
// ScalarEvolution needs to be able to find the exit count.
const SCEV *ExitCount = SE->getBackedgeTakenCount(TheLoop);
if (ExitCount == SE->getCouldNotCompute()) {