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changes in function LLVMFlattenInsertChain

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This commit is contained in:
Ilia Filippov
2013-06-14 16:38:54 +04:00
parent d92f9df17c
commit 5c89080469
2 changed files with 13 additions and 11 deletions
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9
llvmutil.cpp
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@@ -648,17 +648,20 @@ LLVMFlattenInsertChain(llvm::Value *inst, int vectorWidth,
// They are not equal to each other so we should return NULL if compare // They are not equal to each other so we should return NULL if compare
// and first element if we have it. // and first element if we have it.
Assert(compare == true || elements[0] != NULL); Assert(compare == true || elements[0] != NULL);
if (compare) if (compare) {
return NULL; return NULL;
else }
else {
return elements[0]; return elements[0];
} }
}
// TODO: Also, should we handle some other values like // TODO: Also, should we handle some other values like
// ConstantDataVectors. // ConstantDataVectors.
} }
if (compare == false) if (compare == false) {
//We simply want first element //We simply want first element
return elements[0]; return elements[0];
}
int null_number = 0; int null_number = 0;
int NonNull = 0; int NonNull = 0;

7
llvmutil.h
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@@ -270,10 +270,9 @@ extern bool LLVMExtractVectorInts(llvm::Value *v, int64_t ret[], int *nElts);
%broadcast.1 = shufflevector <4 x i32> %smear.0, <4 x i32> undef, %broadcast.1 = shufflevector <4 x i32> %smear.0, <4 x i32> undef,
<4 x i32> zeroinitializer <4 x i32> zeroinitializer
Function returns: Function returns:
First element of array if compare is false, Compare all elements and return one of them if all are equal, otherwise NULL.
NonNull element only if all elements are equal or NULL if compare is true, If compare argument is false, don't do compare and return first element instead.
NonNull element only if all elements are equal if compare is true and undef is false, If undef argument is true, ignore undef elements (but all undef yields NULL anyway).
NULL if all elements are NULLs
*/ */
extern llvm::Value * LLVMFlattenInsertChain (llvm::Value *inst, int vectorWidth, extern llvm::Value * LLVMFlattenInsertChain (llvm::Value *inst, int vectorWidth,
bool compare = true, bool undef = true); bool compare = true, bool undef = true);