Changes in directory llvm/lib/CodeGen/SelectionDAG:
SelectionDAG.cpp updated: 1.239 -> 1.240
---
Log message:
Constant fold ctpop/ctlz/cttz, and a couple other small cleanups
---
Diffs of the changes: (+58 -2)
SelectionDAG.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 58 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.239
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.240
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.239 Sun Jan 15
02:39:35 2006
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp Mon Jan 16 02:07:10 2006
@@ -32,6 +32,8 @@
switch (Opcode) {
case ISD::ADD:
case ISD::MUL:
+ case ISD::MULHU:
+ case ISD::MULHS:
case ISD::FADD:
case ISD::FMUL:
case ISD::AND:
@@ -828,6 +830,7 @@
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
SDOperand Operand) {
+ unsigned Tmp1;
// Constant fold unary operations with an integer constant operand.
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) {
uint64_t Val = C->getValue();
@@ -848,6 +851,59 @@
return getConstantFP(BitsToDouble(Val), VT);
}
break;
+ case ISD::BSWAP:
+ switch(VT) {
+ default: assert(0 && "Invalid bswap!"); break;
+ case MVT::i16: return getConstant(ByteSwap_16((unsigned short)Val), VT);
+ case MVT::i32: return getConstant(ByteSwap_32((unsigned)Val), VT);
+ case MVT::i64: return getConstant(ByteSwap_64(Val), VT);
+ }
+ break;
+ case ISD::CTPOP:
+ switch(VT) {
+ default: assert(0 && "Invalid ctpop!"); break;
+ case MVT::i1: return getConstant(Val != 0, VT);
+ case MVT::i8:
+ Tmp1 = (unsigned)Val & 0xFF;
+ return getConstant(CountPopulation_32(Tmp1), VT);
+ case MVT::i16:
+ Tmp1 = (unsigned)Val & 0xFFFF;
+ return getConstant(CountPopulation_32(Tmp1), VT);
+ case MVT::i32:
+ return getConstant(CountPopulation_32((unsigned)Val), VT);
+ case MVT::i64:
+ return getConstant(CountPopulation_64(Val), VT);
+ }
+ case ISD::CTLZ:
+ switch(VT) {
+ default: assert(0 && "Invalid ctlz!"); break;
+ case MVT::i1: return getConstant(Val == 0, VT);
+ case MVT::i8:
+ Tmp1 = (unsigned)Val & 0xFF;
+ return getConstant(CountLeadingZeros_32(Tmp1)-24, VT);
+ case MVT::i16:
+ Tmp1 = (unsigned)Val & 0xFFFF;
+ return getConstant(CountLeadingZeros_32(Tmp1)-16, VT);
+ case MVT::i32:
+ return getConstant(CountLeadingZeros_32((unsigned)Val), VT);
+ case MVT::i64:
+ return getConstant(CountLeadingZeros_64(Val), VT);
+ }
+ case ISD::CTTZ:
+ switch(VT) {
+ default: assert(0 && "Invalid cttz!"); break;
+ case MVT::i1: return getConstant(Val == 0, VT);
+ case MVT::i8:
+ Tmp1 = (unsigned)Val | 0x100;
+ return getConstant(CountTrailingZeros_32(Tmp1), VT);
+ case MVT::i16:
+ Tmp1 = (unsigned)Val | 0x10000;
+ return getConstant(CountTrailingZeros_32(Tmp1), VT);
+ case MVT::i32:
+ return getConstant(CountTrailingZeros_32((unsigned)Val), VT);
+ case MVT::i64:
+ return getConstant(CountTrailingZeros_64(Val), VT);
+ }
}
}
@@ -1926,7 +1982,6 @@
case ISD::SRL: return "srl";
case ISD::ROTL: return "rotl";
case ISD::ROTR: return "rotr";
- case ISD::BSWAP: return "bswap";
case ISD::FADD: return "fadd";
case ISD::FSUB: return "fsub";
case ISD::FMUL: return "fmul";
@@ -1993,7 +2048,8 @@
case ISD::MEMCPY: return "memcpy";
case ISD::MEMMOVE: return "memmove";
- // Bit counting
+ // Bit manipulation
+ case ISD::BSWAP: return "bswap";
case ISD::CTPOP: return "ctpop";
case ISD::CTTZ: return "cttz";
case ISD::CTLZ: return "ctlz";
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