RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-12-24 04:25:22 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Propagate debug loc info in SUB.

Browse Source 
llvm-svn: 63368
This commit is contained in:
Bill Wendling 2009-01-30 02:42:10 +00:00
parent 665afce822
commit a7791b0e4e
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -1209,7 +1209,7 @@ SDValue DAGCombiner::visitSUB(SDNode *N) {
return DAG.FoldConstantArithmetic(ISD::SUB, VT, N0C, N1C);
// fold (sub x, c) -> (add x, -c)
if (N1C)
return DAG.getNode(ISD::ADD, VT, N0,
return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0,
DAG.getConstant(-N1C->getAPIntValue(), VT));
// fold (A+B)-A -> B
if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1)
@ -1222,25 +1222,26 @@ SDValue DAGCombiner::visitSUB(SDNode *N) {
(N0.getOperand(1).getOpcode() == ISD::SUB ||
N0.getOperand(1).getOpcode() == ISD::ADD) &&
N0.getOperand(1).getOperand(0) == N1)
return DAG.getNode(N0.getOperand(1).getOpcode(), VT, N0.getOperand(0),
N0.getOperand(1).getOperand(1));
return DAG.getNode(N0.getOperand(1).getOpcode(), N->getDebugLoc(), VT,
N0.getOperand(0), N0.getOperand(1).getOperand(1));
// fold ((A+(C+B))-B) -> A+C
if (N0.getOpcode() == ISD::ADD &&
N0.getOperand(1).getOpcode() == ISD::ADD &&
N0.getOperand(1).getOperand(1) == N1)
return DAG.getNode(ISD::ADD, VT, N0.getOperand(0),
N0.getOperand(1).getOperand(0));
return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT,
N0.getOperand(0), N0.getOperand(1).getOperand(0));
// fold ((A-(B-C))-C) -> A-B
if (N0.getOpcode() == ISD::SUB &&
N0.getOperand(1).getOpcode() == ISD::SUB &&
N0.getOperand(1).getOperand(1) == N1)
return DAG.getNode(ISD::SUB, VT, N0.getOperand(0),
N0.getOperand(1).getOperand(0));
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT,
N0.getOperand(0), N0.getOperand(1).getOperand(0));
// fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
SDValue Result = combineSelectAndUse(N, N1, N0, DAG, TLI, LegalOperations);
if (Result.getNode()) return Result;
}
// If either operand of a sub is undef, the result is undef
if (N0.getOpcode() == ISD::UNDEF)
return N0;