[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
Chris Lattner
lattner at cs.uiuc.edu
Thu Sep 1 17:17:43 PDT 2005
Changes in directory llvm/lib/CodeGen/SelectionDAG:
SelectionDAG.cpp updated: 1.182 -> 1.183
---
Log message:
Add support for ANY_EXTEND and add a few minor folds for it
---
Diffs of the changes: (+11 -1)
SelectionDAG.cpp | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletion(-)
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.182 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.183
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.182 Thu Sep 1 18:25:49 2005
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp Thu Sep 1 19:17:32 2005
@@ -1000,6 +1000,7 @@
switch (Opcode) {
default: break;
case ISD::SIGN_EXTEND: return getConstant(C->getSignExtended(), VT);
+ case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND: return getConstant(Val, VT);
case ISD::TRUNCATE: return getConstant(Val, VT);
case ISD::SINT_TO_FP: return getConstantFP(C->getSignExtended(), VT);
@@ -1034,11 +1035,18 @@
if (OpOpcode == ISD::ZERO_EXTEND) // (zext (zext x)) -> (zext x)
return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0));
break;
+ case ISD::ANY_EXTEND:
+ if (Operand.getValueType() == VT) return Operand; // noop extension
+ if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND)
+ // (ext (zext x)) -> (zext x) and (ext (sext x)) -> (sext x)
+ return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
+ break;
case ISD::TRUNCATE:
if (Operand.getValueType() == VT) return Operand; // noop truncate
if (OpOpcode == ISD::TRUNCATE)
return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
- else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND) {
+ else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND ||
+ OpOpcode == ISD::ANY_EXTEND) {
// If the source is smaller than the dest, we still need an extend.
if (Operand.Val->getOperand(0).getValueType() < VT)
return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
@@ -1378,6 +1386,7 @@
// FIXME: Should add a corresponding version of this for
// ZERO_EXTEND/SIGN_EXTEND by converting them to an ANY_EXTEND node which
// we don't have yet.
+ // FIXME: NOW WE DO, add this.
// and (sign_extend_inreg x:16:32), 1 -> and x, 1
if (N1.getOpcode() == ISD::SIGN_EXTEND_INREG) {
@@ -2251,6 +2260,7 @@
// Conversion operators.
case ISD::SIGN_EXTEND: return "sign_extend";
case ISD::ZERO_EXTEND: return "zero_extend";
+ case ISD::ANY_EXTEND: return "any_extend";
case ISD::SIGN_EXTEND_INREG: return "sign_extend_inreg";
case ISD::TRUNCATE: return "truncate";
case ISD::FP_ROUND: return "fp_round";
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