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make tblgen autogenerate the nocapture intrinsics for 

llvm.memcpy/memset/memmove.  This allows removal of some 
hackish code from basicaa.

llvm-svn: 62071
This commit is contained in:
Chris Lattner 2009-01-12 02:41:37 +00:00
parent 027c5fbb6d
commit 2089cd09ba
2 changed files with 22 additions and 11 deletions
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4
llvm/lib/Analysis/BasicAliasAnalysis.cpp
View File

@ -69,10 +69,6 @@ static bool AddressMightEscape(const Value *V) {
if (cast<CallInst>(I)->paramHasAttr(UI.getOperandNo(),
Attribute::NoCapture))
continue;
// FIXME: MemIntrinsics should have their operands marked nocapture!
if (isa<MemIntrinsic>(I))
continue; // next use
return true;
case Instruction::Invoke:
// If the argument to the call has the nocapture attribute, then the call

29
llvm/utils/TableGen/IntrinsicEmitter.cpp
View File

@ -423,8 +423,7 @@ EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
OS << " break;\n";
OS << " }\n";
OS << " AttributeWithIndex AWI[" << MaxArgAttrs+1 << "];\n";
OS << " AWI[0] = AttributeWithIndex::get(~0, Attr);\n";
OS << " unsigned NumAttrs = 1;\n";
OS << " unsigned NumAttrs = 0;\n";
OS << " switch (id) {\n";
OS << " default: break;\n";
@ -441,17 +440,33 @@ EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
unsigned NumArgsWithAttrs = 0;
// FIXME: EMIT ATTRS
while (!ArgAttrs.empty()) {
unsigned ArgNo = ArgAttrs[0].first;
OS << " AWI[" << NumArgsWithAttrs++ << "] = AttributeWithIndex::get("
<< ArgNo+1 << ", 0";
while (!ArgAttrs.empty() && ArgAttrs[0].first == ArgNo) {
switch (ArgAttrs[0].second) {
default: assert(0 && "Unknown arg attribute");
case CodeGenIntrinsic::NoCapture:
OS << "|Attribute::NoCapture";
break;
}
ArgAttrs.erase(ArgAttrs.begin());
}
OS << ");\n";
}
OS << " NumAttrs = " << NumArgsWithAttrs+1 << ";\n";
OS << " NumAttrs = " << NumArgsWithAttrs << ";\n";
OS << " break;\n";
}
OS << " }\n";
OS << " return AttrListPtr::get(AWI, NumAttrs);\n";
OS << " AWI[NumAttrs] = AttributeWithIndex::get(~0, Attr);\n";
OS << " return AttrListPtr::get(AWI, NumAttrs+1);\n";
OS << "}\n";
OS << "#endif\n\n";
OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n";
}
void IntrinsicEmitter::