[LLVMdev] creating a vreg in eliminateFrameIndex() (original) (raw)
Steve King steve at metrokings.com
Fri Jan 30 09:20:43 PST 2015
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On Fri, Jan 30, 2015 at 8:59 AM, Hal Finkel <hfinkel at anl.gov> wrote:
When the scavenged register is loaded with a simple immediate, is it safe to search the BB and replace other uses of the same immediate with the reg? In my case this gives a code size reduction. The search would stop on finding another use of the scavenged register. Are you asking whether that would be safe to do on all targets?
No, just a poor question -- I had in mind only my out-of-tree target. I take the answer as "it depends on your target".
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