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Rather than having special rules like "intrinsics cannot

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throw exceptions", just mark intrinsics with the nounwind
attribute.  Likewise, mark intrinsics as readnone/readonly
and get rid of special aliasing logic (which didn't use
anything more than this anyway).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-12-03 20:06:50 +00:00
parent 4cf4b69330
commit a3355ffb3d
22 changed files with 136 additions and 146 deletions
Download Patch File Download Diff File Expand all files Collapse all files
utils/TableGen/IntrinsicEmitter.cpp
+10 -44
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@@ -42,14 +42,8 @@ void IntrinsicEmitter::run(std::ostream &OS) {
// Emit the intrinsic declaration generator.
EmitGenerator(Ints, OS);
// Emit mod/ref info for each function.
EmitModRefInfo(Ints, OS);
// Emit table of non-memory accessing intrinsics.
EmitNoMemoryInfo(Ints, OS);
// Emit side effect info for each intrinsic.
EmitSideEffectInfo(Ints, OS);
// Emit the intrinsic parameter attributes.
EmitAttributes(Ints, OS);
// Emit a list of intrinsics with corresponding GCC builtins.
EmitGCCBuiltinList(Ints, OS);
@@ -297,30 +291,11 @@ void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
OS << "#endif\n\n";
}
void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
OS << "// BasicAliasAnalysis code.\n";
OS << "#ifdef GET_MODREF_BEHAVIOR\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
switch (Ints[i].ModRef) {
default: break;
case CodeGenIntrinsic::NoMem:
OS << " NoMemoryIntrinsics->set(Intrinsic::" << Ints[i].EnumName << ");\n";
break;
case CodeGenIntrinsic::ReadArgMem:
case CodeGenIntrinsic::ReadMem:
OS << " OnlyReadsMemoryIntrinsics->set(Intrinsic::" << Ints[i].EnumName << ");\n";
break;
}
}
OS << "#endif\n\n";
}
void IntrinsicEmitter::
EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
OS << "// SelectionDAGIsel code.\n";
OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
OS << " switch (IntrinsicID) {\n";
EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
OS << "// Add parameter attributes that are not common to all intrinsics.\n";
OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n";
OS << " switch (id) {\n";
OS << " default: break;\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
switch (Ints[i].ModRef) {
@@ -330,28 +305,19 @@ EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
break;
}
}
OS << " return true; // These intrinsics do not reference memory.\n";
OS << " }\n";
OS << "#endif\n\n";
}
void IntrinsicEmitter::
EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
OS << "// Return true if doesn't access or only reads memory.\n";
OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
OS << " switch (IntrinsicID) {\n";
OS << " default: break;\n";
OS << " Attr |= ParamAttr::ReadNone; // These do not access memory.\n";
OS << " break;\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
switch (Ints[i].ModRef) {
default: break;
case CodeGenIntrinsic::NoMem:
case CodeGenIntrinsic::ReadArgMem:
case CodeGenIntrinsic::ReadMem:
OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
break;
}
}
OS << " return true; // These intrinsics have no side effects.\n";
OS << " Attr |= ParamAttr::ReadOnly; // These do not write memory.\n";
OS << " break;\n";
OS << " }\n";
OS << "#endif\n\n";
}