[LLVMdev] Which transform passes to apply?
baldrick at free.fr
Mon Dec 3 18:01:30 PST 2012
On 03/12/12 02:58, Josh Klontz wrote:
> Hello, I'm a new LLVM user working on a C++ EDSL for image processing. I have
> a function, which after applying createInstructionCombiningPass() and
> createDeadCodeEliminationPass() looks like:
> *%dst_yRem = urem i32 %i, %dst_columns
> %dst_y = urem i32 %i, %dst_columns
> %1 = sub i32 %i, %dst_y
> %2 = add i32 %1, %dst_yRem*
> My question is which optimization pass(es) are needed to simplify the
> instructions in bold. I've tried running the same passes again and also
> tried createInstructionSimplifierPass() with no luck.
GVN or EarlyCSE.
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