On Mon, Jun 24, 2019 at 04:33:40PM +0100, Dennis Zhang wrote: > Hi, > > A number of AArch64 define_expand patterns have specified constraints > for their operands. But the constraint strings are ignored at expand > time and are therefore redundant/useless. We now avoid specifying > constraints in new define_expands, but we should clean up the existing > define_expand definitions. > > For example, the constraint "=w" is removed in the following case: > (define_expand "sqrt<mode>2" > [(set (match_operand:GPF_F16 0 "register_operand" "=w") > The "" marks with an empty constraint in define_expand are removed as well. > > The patch is tested with the build configuration of > --target=aarch64-none-linux-gnu, and it passes gcc/testsuite.
This is OK for trunk. Thanks, James > gcc/ChangeLog: > > 2019-06-21 Dennis Zhang <dennis.zh...@arm.com> > > * config/aarch64/aarch64-simd.md: Remove redundant constraints > from define_expand. > * config/aarch64/aarch64-sve.md: Likewise. > * config/aarch64/aarch64.md: Likewise. > * config/aarch64/atomics.md: Likewise.
