[llvm] 7e02bc8 - [NFC][ARM] LowOverheadLoop DEBUG statements
Sam Parker via llvm-commits
llvm-commits at lists.llvm.org
Thu Oct 1 05:38:36 PDT 2020
Author: Sam Parker
Date: 2020-10-01T13:38:16+01:00
New Revision: 7e02bc81c6dad90b0f98f74152f4b0991087d78d
URL: https://github.com/llvm/llvm-project/commit/7e02bc81c6dad90b0f98f74152f4b0991087d78d
DIFF: https://github.com/llvm/llvm-project/commit/7e02bc81c6dad90b0f98f74152f4b0991087d78d.diff
LOG: [NFC][ARM] LowOverheadLoop DEBUG statements
Added:
Modified:
llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
index ac787a1674ab..d642499833d7 100644
--- a/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
+++ b/llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
@@ -603,8 +603,10 @@ bool LowOverheadLoop::ValidateTailPredicate() {
return false;
}
- if (!VPTState::isValid(RDA))
+ if (!VPTState::isValid(RDA)) {
+ LLVM_DEBUG(dbgs() << "ARM Loops: Invalid VPT state.\n");
return false;
+ }
if (!ValidateLiveOuts()) {
LLVM_DEBUG(dbgs() << "ARM Loops: Invalid live outs.\n");
@@ -655,9 +657,13 @@ bool LowOverheadLoop::ValidateTailPredicate() {
// instructions in the preheader.
auto CannotInsertWDLSTPBetween = [](MachineBasicBlock::iterator I,
MachineBasicBlock::iterator E) {
- for (; I != E; ++I)
- if (shouldInspect(*I))
+ for (; I != E; ++I) {
+ if (shouldInspect(*I)) {
+ LLVM_DEBUG(dbgs() << "ARM Loops: Instruction blocks [W|D]LSTP"
+ << " insertion: " << *I);
return true;
+ }
+ }
return false;
};
@@ -719,11 +725,17 @@ bool LowOverheadLoop::ValidateTailPredicate() {
continue;
if (isSubImmOpcode(MI->getOpcode())) {
- if (FoundSub || !IsValidSub(MI, ExpectedVectorWidth))
+ if (FoundSub || !IsValidSub(MI, ExpectedVectorWidth)) {
+ LLVM_DEBUG(dbgs() << "ARM Loops: Unexpected instruction in element"
+ " count: " << *MI);
return false;
+ }
FoundSub = true;
- } else
+ } else {
+ LLVM_DEBUG(dbgs() << "ARM Loops: Unexpected instruction in element"
+ " count: " << *MI);
return false;
+ }
}
ToRemove.insert(ElementChain.begin(), ElementChain.end());
}
@@ -1082,8 +1094,14 @@ void LowOverheadLoop::Validate(ARMBasicBlockUtils *BBUtils) {
Revert = true;
return;
}
-
TryAdjustInsertionPoint(StartInsertPt, Start, RDA);
+ LLVM_DEBUG(if (StartInsertPt == StartInsertBB->end())
+ dbgs() << "ARM Loops: Will insert LoopStart at end of block\n";
+ else
+ dbgs() << "ARM Loops: Will insert LoopStart at "
+ << *StartInsertPt
+ );
+
Revert = !ValidateRanges(Start, End, BBUtils, ML);
CannotTailPredicate = !ValidateTailPredicate();
}
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