6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-14 17:34:41 +00:00
Code Issues Projects Releases Wiki Activity

Shift by the word size is invalid IR; don't create it.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122353 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2010-12-21 20:00:06 +00:00
parent 90b0364cff
commit efc96dd38c
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -2967,7 +2967,7 @@ SDValue DAGCombiner::visitSHL(SDNode *N) {
N0.getOperand(1).getOpcode() == ISD::Constant) {
uint64_t c1 = cast<ConstantSDNode>(N0.getOperand(1))->getZExtValue();
uint64_t c2 = N1C->getZExtValue();
if (c1 + c2 > OpSizeInBits)
if (c1 + c2 >= OpSizeInBits)
return DAG.getConstant(0, VT);
return DAG.getNode(ISD::SHL, N->getDebugLoc(), VT, N0.getOperand(0),
DAG.getConstant(c1 + c2, N1.getValueType()));
@ -3165,7 +3165,7 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
N0.getOperand(1).getOpcode() == ISD::Constant) {
uint64_t c1 = cast<ConstantSDNode>(N0.getOperand(1))->getZExtValue();
uint64_t c2 = N1C->getZExtValue();
if (c1 + c2 > OpSizeInBits)
if (c1 + c2 >= OpSizeInBits)
return DAG.getConstant(0, VT);
return DAG.getNode(ISD::SRL, N->getDebugLoc(), VT, N0.getOperand(0),
DAG.getConstant(c1 + c2, N1.getValueType()));