6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-30 17:33:24 +00:00
Code Issues Projects Releases Wiki Activity

Simplify this code; switch lowering shouldn't produce cases

Browse Source 
which trivially fold away.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106765 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-06-24 17:08:31 +00:00
parent 2ea09e0546
commit deca052d9d
1 changed files with 4 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -1424,18 +1424,10 @@ void SelectionDAGBuilder::visitSwitchCase(CaseBlock &CB,
MVT::Other, getControlRoot(), Cond, MVT::Other, getControlRoot(), Cond,
DAG.getBasicBlock(CB.TrueBB)); DAG.getBasicBlock(CB.TrueBB));
// If the branch was constant folded, fix up the CFG. // Insert the false branch.
if (BrCond.getOpcode() == ISD::BR) { if (CB.FalseBB != NextBlock)
SwitchBB->removeSuccessor(CB.FalseBB); BrCond = DAG.getNode(ISD::BR, dl, MVT::Other, BrCond,
} else { DAG.getBasicBlock(CB.FalseBB));
// Otherwise, go ahead and insert the false branch.
if (BrCond == getControlRoot())
SwitchBB->removeSuccessor(CB.TrueBB);
if (CB.FalseBB != NextBlock)
BrCond = DAG.getNode(ISD::BR, dl, MVT::Other, BrCond,
DAG.getBasicBlock(CB.FalseBB));
}
DAG.setRoot(BrCond); DAG.setRoot(BrCond);
} }