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Add arbitrary integer support to getRegisterType and

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getNumRegisters.  This is needed for calling functions
with apint parameters or return values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46956 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-02-11 11:09:23 +00:00
parent e3320a1bcc
commit 04feb51886
1 changed files with 11 additions and 1 deletions
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12
include/llvm/Target/TargetLowering.h
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@ -434,13 +434,18 @@ public:
(void)getVectorTypeBreakdown(VT, VT1, NumIntermediates, RegisterVT);
return RegisterVT;
}
if (MVT::isInteger(VT)) {
return getRegisterType(getTypeToTransformTo(VT));
}
assert(0 && "Unsupported extended type!");
}
/// getNumRegisters - Return the number of registers that this ValueType will
/// eventually require. This is one for any types promoted to live in larger
/// registers, but may be more than one for types (like i64) that are split
/// into pieces.
/// into pieces. For types like i140, which are first promoted then expanded,
/// it is the number of registers needed to hold all the bits of the original
/// type. For an i140 on a 32 bit machine this means 5 registers.
unsigned getNumRegisters(MVT::ValueType VT) const {
if (!MVT::isExtendedVT(VT)) {
assert(VT < array_lengthof(NumRegistersForVT));
@ -451,6 +456,11 @@ public:
unsigned NumIntermediates;
return getVectorTypeBreakdown(VT, VT1, NumIntermediates, VT2);
}
if (MVT::isInteger(VT)) {
unsigned BitWidth = MVT::getSizeInBits(VT);
unsigned RegWidth = MVT::getSizeInBits(getRegisterType(VT));
return (BitWidth + RegWidth - 1) / RegWidth;
}
assert(0 && "Unsupported extended type!");
}