https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65139
Bug ID: 65139
Summary: Improve register allocation for
aarch64_*_sisd_or_int<mode>3 patterns
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: mkuvyrkov at gcc dot gnu.org
Following discussion in http://thread.gmane.org/gmane.comp.gcc.patches/336162 ,
review usage of early clobber in aarch64_lshr_sisd_or_int_≤mode>3,
aarch64_ashr_sisd_or_int_≤mode>3, and, maybe, other patterns. Convert them to
use (match_scratch) and compare quality of generated code between the two
approaches.
In theory, (match_scratch) should give more freedom to RA, but this requires
double-checking.
