[llvm-commits] CVS: llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp
Nate Begeman
natebegeman at mac.com
Fri Nov 19 00:01:26 PST 2004
Changes in directory llvm/lib/Target/PowerPC:
PPC32ISelSimple.cpp updated: 1.106 -> 1.107
---
Log message:
Eliminate another 6k register copies that the register allocator would just
coalesce out of hbd. Speeds up compilation by 2% (0.6s)
---
Diffs of the changes: (+14 -8)
Index: llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp
diff -u llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp:1.106 llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp:1.107
--- llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp:1.106 Thu Nov 18 20:06:40 2004
+++ llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp Fri Nov 19 02:01:16 2004
@@ -3013,7 +3013,8 @@
ConstantSInt *offset = GEPMap[GEPI].offset;
if (Class != cLong) {
- unsigned TmpReg = makeAnotherReg(I.getType());
+ unsigned TmpReg = LoadNeedsSignExtend(I) ? makeAnotherReg(I.getType())
+ : DestReg;
if (indexReg == 0)
BuildMI(BB, ImmOpcode, 2, TmpReg).addSImm(offset->getValue())
.addReg(baseReg);
@@ -3021,8 +3022,6 @@
BuildMI(BB, IdxOpcode, 2, TmpReg).addReg(indexReg).addReg(baseReg);
if (LoadNeedsSignExtend(I))
BuildMI(BB, PPC::EXTSB, 1, DestReg).addReg(TmpReg);
- else
- BuildMI(BB, PPC::OR, 2, DestReg).addReg(TmpReg).addReg(TmpReg);
} else {
indexReg = (indexReg != 0) ? indexReg : getReg(offset);
unsigned indexPlus4 = makeAnotherReg(Type::IntTy);
@@ -3820,7 +3819,7 @@
indexReg = getReg(remainder, MBB, IP);
remainder = 0;
}
- } else {
+ } else if (!remainder->isNullValue()) {
unsigned TmpReg = makeAnotherReg(Type::IntTy);
emitBinaryConstOperation(MBB, IP, indexReg, remainder, 0, TmpReg);
indexReg = TmpReg;
@@ -3835,12 +3834,19 @@
// destination register.
unsigned TargetReg = getReg(GEPI, MBB, IP);
unsigned basePtrReg = getReg(Src, MBB, IP);
- if (indexReg != 0) {
- unsigned TmpReg = makeAnotherReg(Type::IntTy);
- BuildMI(*MBB, IP, PPC::ADD, 2, TmpReg).addReg(indexReg).addReg(basePtrReg);
+
+ if ((indexReg == 0) && remainder->isNullValue())
+ RegMap[GEPI] = basePtrReg;
+
+ if (!remainder->isNullValue()) {
+ unsigned TmpReg = (indexReg == 0) ? TargetReg : makeAnotherReg(Type::IntTy);
+ emitBinaryConstOperation(MBB, IP, basePtrReg, remainder, 0, TmpReg);
basePtrReg = TmpReg;
}
- emitBinaryConstOperation(MBB, IP, basePtrReg, remainder, 0, TargetReg);
+ if (indexReg != 0) {
+ BuildMI(*MBB, IP, PPC::ADD, 2, TargetReg).addReg(indexReg)
+ .addReg(basePtrReg);
+ }
}
/// visitAllocaInst - If this is a fixed size alloca, allocate space from the
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