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Split ISD::LABEL into ISD::DBG_LABEL and ISD::EH_LABEL, eliminating

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the need for a flavor operand, and add a new SDNode subclass,
LabelSDNode, for use with them to eliminate the need for a label id
operand.

Change instruction selection to let these label nodes through
unmodified instead of creating copies of them. Teach the MachineInstr
emitter how to emit a MachineInstr directly from an ISD label node.

This avoids the need for allocating SDNodes for the label id and
flavor value, as well as SDNodes for each of the post-isel label,
label id, and label flavor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-01 00:05:16 +00:00
parent c2bf1870a7
commit 4406604047
35 changed files with 192 additions and 114 deletions
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utils/TableGen/CodeGenTarget.cpp
+17 -5
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@@ -286,9 +286,17 @@ getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
if (I == Instructions.end()) throw "Could not find 'INLINEASM' instruction!";
const CodeGenInstruction *INLINEASM = &I->second;
I = getInstructions().find("LABEL");
if (I == Instructions.end()) throw "Could not find 'LABEL' instruction!";
const CodeGenInstruction *LABEL = &I->second;
I = getInstructions().find("DBG_LABEL");
if (I == Instructions.end()) throw "Could not find 'DBG_LABEL' instruction!";
const CodeGenInstruction *DBG_LABEL = &I->second;
I = getInstructions().find("EH_LABEL");
if (I == Instructions.end()) throw "Could not find 'EH_LABEL' instruction!";
const CodeGenInstruction *EH_LABEL = &I->second;
I = getInstructions().find("GC_LABEL");
if (I == Instructions.end()) throw "Could not find 'GC_LABEL' instruction!";
const CodeGenInstruction *GC_LABEL = &I->second;
I = getInstructions().find("DECLARE");
if (I == Instructions.end()) throw "Could not find 'DECLARE' instruction!";
@@ -317,7 +325,9 @@ getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
// Print out the rest of the instructions now.
NumberedInstructions.push_back(PHI);
NumberedInstructions.push_back(INLINEASM);
NumberedInstructions.push_back(LABEL);
NumberedInstructions.push_back(DBG_LABEL);
NumberedInstructions.push_back(EH_LABEL);
NumberedInstructions.push_back(GC_LABEL);
NumberedInstructions.push_back(DECLARE);
NumberedInstructions.push_back(EXTRACT_SUBREG);
NumberedInstructions.push_back(INSERT_SUBREG);
@@ -326,7 +336,9 @@ getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
for (inst_iterator II = inst_begin(), E = inst_end(); II != E; ++II)
if (&II->second != PHI &&
&II->second != INLINEASM &&
&II->second != LABEL &&
&II->second != DBG_LABEL &&
&II->second != EH_LABEL &&
&II->second != GC_LABEL &&
&II->second != DECLARE &&
&II->second != EXTRACT_SUBREG &&
&II->second != INSERT_SUBREG &&