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Move check for linear vector to LLVMVectorIsLinear() function.

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This commit is contained in:
Matt Pharr
2012-03-19 11:57:04 -07:00
parent e264d95019
commit 60aae16752
3 changed files with 233 additions and 205 deletions
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10
llvmutil.h
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@@ -230,6 +230,16 @@ extern llvm::Constant *LLVMMaskAllOff;
return false for arrays where the values are actually all equal. */
extern bool LLVMVectorValuesAllEqual(llvm::Value *v);
/** Given vector of integer-typed values, this function returns true if it
can determine that the elements of the vector have a step of 'stride'
between their values and false otherwise. This function tries to
handle as many possibilities as possible, including things like all
elements equal to some non-constant value plus an integer offset, etc.
Needless to say (the halting problem and all that), it may return false
for some vectors that are in fact linear.
*/
extern bool LLVMVectorIsLinear(llvm::Value *v, int stride);
/** Given a vector-typed value v, if the vector is a vector with constant
element values, this function extracts those element values into the
ret[] array and returns the number of elements (i.e. the vector type's