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Implement count leading zeros (ctlz), count trailing zeros (cttz), and count

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population (ctpop).  Generic lowering is implemented, however only promotion
is implemented for SelectionDAG at the moment.

More coming soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21676 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth
2005-05-03 17:19:30 +00:00
parent c88e681498
commit 691ef2ba06
14 changed files with 326 additions and 14 deletions
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5
lib/VMCore/Function.cpp
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@@ -206,6 +206,11 @@ unsigned Function::getIntrinsicID() const {
assert(getName().size() != 5 && "'llvm.' is an invalid intrinsic name!");
switch (getName()[5]) {
case 'c':
if (getName() == "llvm.ctpop") return Intrinsic::ctpop;
if (getName() == "llvm.cttz") return Intrinsic::cttz;
if (getName() == "llvm.ctlz") return Intrinsic::ctlz;
break;
case 'd':
if (getName() == "llvm.dbg.stoppoint") return Intrinsic::dbg_stoppoint;
if (getName() == "llvm.dbg.region.start")return Intrinsic::dbg_region_start;

12
lib/VMCore/Verifier.cpp
View File

@@ -723,6 +723,18 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
NumArgs = 2;
break;
case Intrinsic::ctpop:
case Intrinsic::ctlz:
case Intrinsic::cttz:
Assert1(FT->getNumParams() == 1,
"Illegal # arguments for intrinsic function!", IF);
Assert1(FT->getReturnType() == FT->getParamType(0),
"Return type does not match source type", IF);
Assert1(FT->getParamType(0)->isIntegral(),
"Argument must be of an int type!", IF);
NumArgs = 1;
break;
case Intrinsic::sqrt:
Assert1(FT->getNumParams() == 1,
"Illegal # arguments for intrinsic function!", IF);