6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 20:32:21 +00:00
Code Issues Projects Releases Wiki Activity

Allow hoisting loads of globals and alloca's in conditionals.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18363 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-11-29 21:26:12 +00:00
parent 478b3b42e2
commit 8a9193927a
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/Transforms/Scalar/LICM.cpp
View File

@ -592,6 +592,12 @@ bool LICM::isSafeToExecuteUnconditionally(Instruction &Inst) {
if (Inst.getParent() == CurLoop->getHeader())
return true;
// It's always safe to load from a global or alloca.
if (isa<LoadInst>(Inst))
if (isa<AllocationInst>(Inst.getOperand(0)) ||
isa<GlobalVariable>(Inst.getOperand(0)))
return true;
// Get the exit blocks for the current loop.
std::vector<BasicBlock*> ExitBlocks;
CurLoop->getExitBlocks(ExitBlocks);