RPCS3/llvm
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm.git synced 2024-12-20 19:20:23 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Propagate debug loc info for SREM and UREM.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63374 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2009-01-30 02:57:00 +00:00
parent 07d8514049
commit 6d3bf8c4c3
1 changed files with 12 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -1511,18 +1511,19 @@ SDValue DAGCombiner::visitSREM(SDNode *N) {
// urem instead. Handles (X & 0x0FFFFFFF) %s 16 -> X&15
if (!VT.isVector()) {
if (DAG.SignBitIsZero(N1) && DAG.SignBitIsZero(N0))
return DAG.getNode(ISD::UREM, VT, N0, N1);
return DAG.getNode(ISD::UREM, N->getDebugLoc(), VT, N0, N1);
}
// If X/C can be simplified by the division-by-constant logic, lower
// X%C to the equivalent of X-X/C*C.
if (N1C && !N1C->isNullValue()) {
SDValue Div = DAG.getNode(ISD::SDIV, VT, N0, N1);
SDValue Div = DAG.getNode(ISD::SDIV, N->getDebugLoc(), VT, N0, N1);
AddToWorkList(Div.getNode());
SDValue OptimizedDiv = combine(Div.getNode());
if (OptimizedDiv.getNode() && OptimizedDiv.getNode() != Div.getNode()) {
SDValue Mul = DAG.getNode(ISD::MUL, VT, OptimizedDiv, N1);
SDValue Sub = DAG.getNode(ISD::SUB, VT, N0, Mul);
SDValue Mul = DAG.getNode(ISD::MUL, N->getDebugLoc(), VT,
OptimizedDiv, N1);
SDValue Sub = DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N0, Mul);
AddToWorkList(Mul.getNode());
return Sub;
}
@ -1550,18 +1551,18 @@ SDValue DAGCombiner::visitUREM(SDNode *N) {
return DAG.FoldConstantArithmetic(ISD::UREM, VT, N0C, N1C);
// fold (urem x, pow2) -> (and x, pow2-1)
if (N1C && !N1C->isNullValue() && N1C->getAPIntValue().isPowerOf2())
return DAG.getNode(ISD::AND, VT, N0,
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT, N0,
DAG.getConstant(N1C->getAPIntValue()-1,VT));
// fold (urem x, (shl pow2, y)) -> (and x, (add (shl pow2, y), -1))
if (N1.getOpcode() == ISD::SHL) {
if (ConstantSDNode *SHC = dyn_cast<ConstantSDNode>(N1.getOperand(0))) {
if (SHC->getAPIntValue().isPowerOf2()) {
SDValue Add =
DAG.getNode(ISD::ADD, VT, N1,
DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N1,
DAG.getConstant(APInt::getAllOnesValue(VT.getSizeInBits()),
VT));
AddToWorkList(Add.getNode());
return DAG.getNode(ISD::AND, VT, N0, Add);
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT, N0, Add);
}
}
}
@ -1569,12 +1570,13 @@ SDValue DAGCombiner::visitUREM(SDNode *N) {
// If X/C can be simplified by the division-by-constant logic, lower
// X%C to the equivalent of X-X/C*C.
if (N1C && !N1C->isNullValue()) {
SDValue Div = DAG.getNode(ISD::UDIV, VT, N0, N1);
SDValue Div = DAG.getNode(ISD::UDIV, N->getDebugLoc(), VT, N0, N1);
AddToWorkList(Div.getNode());
SDValue OptimizedDiv = combine(Div.getNode());
if (OptimizedDiv.getNode() && OptimizedDiv.getNode() != Div.getNode()) {
SDValue Mul = DAG.getNode(ISD::MUL, VT, OptimizedDiv, N1);
SDValue Sub = DAG.getNode(ISD::SUB, VT, N0, Mul);
SDValue Mul = DAG.getNode(ISD::MUL, N->getDebugLoc(), VT,
OptimizedDiv, N1);
SDValue Sub = DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N0, Mul);
AddToWorkList(Mul.getNode());
return Sub;
}