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Extend the vcmp/fcmp LLVM IR instructions to take vectors as arguments

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and, if so, to return a vector of boolean as a result;

Extend the select LLVM IR instruction to allow you to specify a result
type which is a vector of boolean, in which case the result will be an
element-wise selection instead of choosing one vector or the other; and

Update LangRef.html to describe these changes.

This patch was contributed by Preston Gurd!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55969 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-09-09 01:02:47 +00:00
parent 3eb594013f
commit f72fb679ef
10 changed files with 181 additions and 47 deletions
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18
lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -641,7 +641,14 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
case Instruction::FCmp:
case Instruction::VICmp:
case Instruction::VFCmp:
Code = bitc::CST_CODE_CE_CMP;
if (isa<VectorType>(C->getOperand(0)->getType())
&& (CE->getOpcode() == Instruction::ICmp
|| CE->getOpcode() == Instruction::FCmp)) {
// compare returning vector of Int1Ty
assert(0 && "Unsupported constant!");
} else {
Code = bitc::CST_CODE_CE_CMP;
}
Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
Record.push_back(VE.getValueID(C->getOperand(0)));
Record.push_back(VE.getValueID(C->getOperand(1)));
@@ -765,7 +772,14 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
case Instruction::FCmp:
case Instruction::VICmp:
case Instruction::VFCmp:
Code = bitc::FUNC_CODE_INST_CMP;
if (isa<VectorType>(I.getOperand(0)->getType())
&& (I.getOpcode() == Instruction::ICmp
|| I.getOpcode() == Instruction::FCmp)) {
// compare returning vector of Int1Ty
Code = bitc::FUNC_CODE_INST_VCMP;
} else {
Code = bitc::FUNC_CODE_INST_CMP;
}
PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Vals.push_back(VE.getValueID(I.getOperand(1)));
Vals.push_back(cast<CmpInst>(I).getPredicate());