6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-08-17 05:29:24 +00:00
Code Issues Projects Releases Wiki Activity

Don't hoist instructions that have implicit uses or defines. Before, it was

Browse Source 
hoisting out some "test" and "cmp" instructions. This was obvious badness.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54908 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2008-08-18 00:33:49 +00:00
parent e86389dd2a
commit d3361e996b
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/CodeGen/MachineLICM.cpp
View File

@ -264,6 +264,11 @@ bool MachineLICM::IsLoopInvariantInst(MachineInstr &I) {
}
});
if (I.getDesc().getImplicitDefs() || I.getDesc().getImplicitUses()) {
DOUT << "Cannot hoist with implicit defines or uses\n";
return false;
}
// The instruction is loop invariant if all of its operands are.
for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
const MachineOperand &MO = I.getOperand(i);