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Add support for alternative register names, useful for instructions whose operands are logically equivalent to existing registers, but happen to be printed specially. For example, an instruciton that prints d0[0] instead of s0.

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Patch by Jim Grosbach.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133940 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2011-06-27 21:06:21 +00:00
parent d1f0bbee18
commit bea6f615ee
14 changed files with 268 additions and 55 deletions
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utils/TableGen/CodeGenInstruction.cpp
+6 -1
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@@ -69,7 +69,9 @@ CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
std::string EncoderMethod;
unsigned NumOps = 1;
DagInit *MIOpInfo = 0;
if (Rec->isSubClassOf("Operand")) {
if (Rec->isSubClassOf("RegisterOperand")) {
PrintMethod = Rec->getValueAsString("PrintMethod");
} else if (Rec->isSubClassOf("Operand")) {
PrintMethod = Rec->getValueAsString("PrintMethod");
// If there is an explicit encoder method, use it.
EncoderMethod = Rec->getValueAsString("EncoderMethod");
@@ -415,6 +417,9 @@ bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo,
// Handle explicit registers.
if (ADI && ADI->getDef()->isSubClassOf("Register")) {
if (InstOpRec->isSubClassOf("RegisterOperand"))
InstOpRec = InstOpRec->getValueAsDef("RegClass");
if (!InstOpRec->isSubClassOf("RegisterClass"))
return false;