RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-19 19:12:56 +02:00
Code Issues Projects Releases Wiki Activity

[SCEV] Rename getMaxBECount and update comments. NFC

Browse Source 
Post commit review comments at D38825.

llvm-svn: 315920
This commit is contained in:
Anna Thomas 2017-10-16 17:47:17 +00:00
parent b85949d044
commit 1811e7f3ce
2 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/llvm/Analysis/ScalarEvolution.h
View File

@ -1746,9 +1746,10 @@ private:
const SCEV *computeBECount(const SCEV *Delta, const SCEV *Stride,
bool Equality);
// Compute the maximum backedge count based on the range of values
// permitted by Start, End, and Stride.
const SCEV *computeMaxBECount(const SCEV *Start, const SCEV *Stride,
/// Compute the maximum backedge count based on the range of values
/// permitted by Start, End, and Stride. This is for loops of the form
/// {Start, +, Stride} LT End.
const SCEV *computeMaxBECountForLT(const SCEV *Start, const SCEV *Stride,
const SCEV *End, unsigned BitWidth,
bool IsSigned);

16
lib/Analysis/ScalarEvolution.cpp
View File

@ -9725,11 +9725,11 @@ const SCEV *ScalarEvolution::computeBECount(const SCEV *Delta, const SCEV *Step,
return getUDivExpr(Delta, Step);
}
const SCEV *ScalarEvolution::computeMaxBECount(const SCEV *Start,
const SCEV *Stride,
const SCEV *End,
unsigned BitWidth,
bool IsSigned) {
const SCEV *ScalarEvolution::computeMaxBECountForLT(const SCEV *Start,
const SCEV *Stride,
const SCEV *End,
unsigned BitWidth,
bool IsSigned) {
assert(!isKnownNonPositive(Stride) &&
"Stride is expected strictly positive!");
@ -9861,7 +9861,7 @@ ScalarEvolution::howManyLessThans(const SCEV *LHS, const SCEV *RHS,
// bound of the loop (RHS), and the fact that IV does not overflow (which is
// checked above).
if (!isLoopInvariant(RHS, L)) {
const SCEV *MaxBECount = computeMaxBECount(
const SCEV *MaxBECount = computeMaxBECountForLT(
Start, Stride, RHS, getTypeSizeInBits(LHS->getType()), IsSigned);
return ExitLimit(getCouldNotCompute() /* ExactNotTaken */, MaxBECount,
false /*MaxOrZero*/, Predicates);
@ -9898,8 +9898,8 @@ ScalarEvolution::howManyLessThans(const SCEV *LHS, const SCEV *RHS,
MaxBECount = BECountIfBackedgeTaken;
MaxOrZero = true;
} else {
MaxBECount = computeMaxBECount(Start, Stride, RHS,
getTypeSizeInBits(LHS->getType()), IsSigned);
MaxBECount = computeMaxBECountForLT(
Start, Stride, RHS, getTypeSizeInBits(LHS->getType()), IsSigned);
}
if (isa<SCEVCouldNotCompute>(MaxBECount) &&