Re: [RFA][RISC-V] Use "uw" forms for constant synthesis

On 5/4/24 6:53 PM, Jeff Law wrote: So another constant synthesis improvement. In this patch we're looking at cases where we'd like to be able to use lui+slli, but can't because of the sign extending nature of lui on TARGET_64BIT.  For example: 0x800110020UL.  The trunk currently gener

Re: [RFA][RISC-V] Use "uw" forms for constant synthesis

On 5/4/24 6:53 PM, Jeff Law wrote: So another constant synthesis improvement. In this patch we're looking at cases where we'd like to be able to use lui+slli, but can't because of the sign extending nature of lui on TARGET_64BIT.  For example: 0x800110020UL.  The trunk currently gener

[RFA][RISC-V] Use "uw" forms for constant synthesis

So another constant synthesis improvement. In this patch we're looking at cases where we'd like to be able to use lui+slli, but can't because of the sign extending nature of lui on TARGET_64BIT. For example: 0x800110020UL. The trunk currently generates 4 instructions for that constant,