search for: xorrxrxry16

Displaying 1 result from an estimated 1 matches for "xorrxrxry16".

2012 Oct 19
2
[LLVMdev] interesting minor llvm optimizer flaw
...e k==-32768 Then it creates the literal -32769 which cannot be placed in a simple immediate field. That creates a lot of extra code for Mips 16. I had originally written a pattern for setge when the right operand is a constant. def: Mips16Pat <(setge CPU16Regs:$lhs, immZExt16:$rhs), (XorRxRxRy16 (SltiCCRxImmX16 CPU16Regs:$lhs, immZExt16:$rhs), (LiRxImmX16 1))>; I was able to work around this boundary case by doing the reverse transformation at the boundary. i..e. z = (x > (k-1)) => z = (x >= k) def: Mips16Pat <(setgt CPU16Regs:$lhs, -32769), (XorRxRxRy16 (Sl...