6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-05 17:39:16 +00:00
Code Issues Projects Releases Wiki Activity

Add back a workaround that fixes some breakages from chris's last change.

Browse Source 
Neither of us have yet figured out why this code is necessary, but stuff
breaks if its not there.  Still tracking this down...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-10-04 00:37:37 +00:00
parent 7a66e686fe
commit 27d404ccd1
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -623,9 +623,20 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
// Do not try to legalize the target-specific arguments (#1+)
Tmp2 = Node->getOperand(0);
if (Tmp1 != Tmp2)
if (Tmp1 != Tmp2) {
Node->setAdjCallChain(Tmp1);
// If moving the operand from pointing to Tmp2 dropped its use count to 1,
// this will cause the maps used to memoize results to get confused.
// Create and add a dummy use, just to increase its use count. This will
// be removed at the end of legalize when dead nodes are removed.
if (Tmp2.Val->hasOneUse()) {
// FIXME: find out why this code is necessary
DAG.getNode(ISD::PCMARKER, MVT::Other, Tmp2,
DAG.getConstant(0, MVT::i32));
}
}
// Note that we do not create new CALLSEQ_DOWN/UP nodes here. These
// nodes are treated specially and are mutated in place. This makes the dag
// legalization process more efficient and also makes libcall insertion