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add a helper method

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30452 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-09-18 04:54:57 +00:00
parent b33a42a21f
commit 79bc332ddb
2 changed files with 21 additions and 0 deletions
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5
include/llvm/Instructions.h
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@ -498,6 +498,11 @@ public:
: UnaryInstruction(Ty, Cast, S, Name, InsertAtEnd) {
}
/// isTruncIntCast - Return true if this is a truncating integer cast
/// instruction, e.g. a cast from long to uint.
bool isTruncIntCast() const;
virtual CastInst *clone() const;
// Methods for support type inquiry through isa, cast, and dyn_cast:

16
lib/VMCore/Instructions.cpp
View File

@ -1151,6 +1151,22 @@ bool ShiftInst::isLogicalShift() const {
return getOpcode() == Instruction::Shl || getType()->isUnsigned();
}
//===----------------------------------------------------------------------===//
// CastInst Class
//===----------------------------------------------------------------------===//
/// isTruncIntCast - Return true if this is a truncating integer cast
/// instruction, e.g. a cast from long to uint.
bool CastInst::isTruncIntCast() const {
// The dest type has to be integral, the input has to be integer.
if (!getType()->isIntegral() || !getOperand(0)->getType()->isInteger())
return false;
// Has to be large to smaller.
return getOperand(0)->getType()->getPrimitiveSizeInBits() >
getType()->getPrimitiveSizeInBits();
}
//===----------------------------------------------------------------------===//
// SetCondInst Class