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Enhance integer division emulation support to handle types smaller than 32 bits,

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enhancement done the trivial way; by extending inputs and truncating outputs 
which is addequate for targets with little or no support for integer arithmetic
on integer types less than 32 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176139 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pedro Artigas
2013-02-26 23:33:20 +00:00
parent bdc98d3510
commit b3201c5cf1
2 changed files with 118 additions and 0 deletions
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14
include/llvm/Transforms/Utils/IntegerDivision.h
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@ -43,6 +43,20 @@ namespace llvm {
/// @brief Replace Div with generated code.
bool expandDivision(BinaryOperator* Div);
/// Generate code to calculate the remainder of two integers, replacing Rem
/// with the generated code. Uses the above 32bit routine, therefore adequate
/// for targets with little or no support for less than 32 bit arithmetic.
///
/// @brief Replace Rem with generated code.
bool expandRemainderUpTo32Bits(BinaryOperator *Rem);
/// Generate code to divide two integers, replacing Div with the generated
/// code. Uses the above 32bit routine, therefore adequate for targets with
/// little or no support for less than 32 bit arithmetic.
///
/// @brief Replace Rem with generated code.
bool expandDivisionUpTo32Bits(BinaryOperator *Div);
} // End llvm namespace
#endif