6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-11 16:37:42 +00:00
Code Issues Projects Releases Wiki Activity

Hoist this loop-invariant logic out of the loop.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96614 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-02-18 21:34:02 +00:00
parent 352d352c02
commit 814f2b2d19
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/Transforms/Scalar/IndVarSimplify.cpp
View File

@ -241,15 +241,17 @@ void IndVarSimplify::RewriteLoopExitValues(Loop *L,
while ((PN = dyn_cast<PHINode>(BBI++))) {
if (PN->use_empty())
continue; // dead use, don't replace it
// SCEV only supports integer expressions for now.
if (!PN->getType()->isIntegerTy() && !PN->getType()->isPointerTy())
continue;
// Iterate over all of the values in all the PHI nodes.
for (unsigned i = 0; i != NumPreds; ++i) {
// If the value being merged in is not integer or is not defined
// in the loop, skip it.
Value *InVal = PN->getIncomingValue(i);
if (!isa<Instruction>(InVal) ||
// SCEV only supports integer expressions for now.
(!InVal->getType()->isIntegerTy() &&
!InVal->getType()->isPointerTy()))
if (!isa<Instruction>(InVal))
continue;
// If this pred is for a subloop, not L itself, skip it.