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Add an option to not print the alias of an instruction. It defaults to "print

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the alias".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129485 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-04-13 23:36:21 +00:00
parent 7adf862eb2
commit eef965f04b
3 changed files with 8 additions and 3 deletions
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3
include/llvm/Target/Target.td
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@ -591,9 +591,10 @@ class MnemonicAlias<string From, string To> {
/// InstAlias - This defines an alternate assembly syntax that is allowed to
/// match an instruction that has a different (more canonical) assembly
/// representation.
class InstAlias<string Asm, dag Result> {
class InstAlias<string Asm, dag Result, bit Emit = 0b1> {
string AsmString = Asm; // The .s format to match the instruction with.
dag ResultInst = Result; // The MCInst to generate.
bit EmitAlias = Emit; // Emit the alias instead of what's aliased.
// Predicates - Predicates that must be true for this to match.
list<Predicate> Predicates = [];

6
lib/Target/X86/X86InstrInfo.td
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@ -1534,8 +1534,10 @@ def : InstAlias<"mov $seg, $mem", (MOV32ms i32mem:$mem, SEGMENT_REG:$seg)>;
def : InstAlias<"movq $imm, $reg", (MOV64ri GR64:$reg, i64imm:$imm)>;
// Match 'movq GR64, MMX' as an alias for movd.
def : InstAlias<"movq $src, $dst", (MMX_MOVD64to64rr VR64:$dst, GR64:$src)>;
def : InstAlias<"movq $src, $dst", (MMX_MOVD64from64rr GR64:$dst, VR64:$src)>;
def : InstAlias<"movq $src, $dst",
(MMX_MOVD64to64rr VR64:$dst, GR64:$src), 0b0>;
def : InstAlias<"movq $src, $dst",
(MMX_MOVD64from64rr GR64:$dst, VR64:$src), 0b0>;
// movsd with no operands (as opposed to the SSE scalar move of a double) is an
// alias for movsl. (as in rep; movsd)

2
utils/TableGen/AsmWriterEmitter.cpp
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@ -840,6 +840,8 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
I = AllInstAliases.begin(), E = AllInstAliases.end(); I != E; ++I) {
CodeGenInstAlias *Alias = new CodeGenInstAlias(*I, Target);
const Record *R = *I;
if (!R->getValueAsBit("EmitAlias"))
continue; // We were told not to emit the alias, but to emit the aliasee.
const DagInit *DI = R->getValueAsDag("ResultInst");
const DefInit *Op = dynamic_cast<const DefInit*>(DI->getOperator());
AliasMap[getQualifiedName(Op->getDef())].push_back(Alias);