procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

[AArch64] Robustify aarch64_wrffr

Browse source 
This patch uses distinct values for the FFR and FFRT outputs of
aarch64_wrffr, so that a following aarch64_copy_ffr_to_ffrt has
an effect.  This is needed to avoid regressions with later patches.

The block comment at the head of the file already described
the pattern this way, and there was already an unspec for it.
Not sure what made me change it...

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64-sve.md (aarch64_wrffr): Wrap the FFRT
	output in UNSPEC_WRFFR.

From-SVN: r278356
This commit is contained in:
Richard Sandiford 2019-11-16 13:31:28 +00:00 • committed by Richard Sandiford
parent f9d6338bd1
commit 4ec943d630
2 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
gcc/ChangeLog
View file

@ -1,3 +1,8 @@
2019-11-16 Richard Sandiford <richard.sandiford@arm.com>
* config/aarch64/aarch64-sve.md (aarch64_wrffr): Wrap the FFRT
output in UNSPEC_WRFFR.
2019-11-16 Richard Sandiford <richard.sandiford@arm.com>
* tree-data-ref.c (create_intersect_range_checks_index): Rewrite

2
gcc/config/aarch64/aarch64-sve.md
View file

@ -984,7 +984,7 @@
[(set (reg:VNx16BI FFR_REGNUM)
(match_operand:VNx16BI 0 "aarch64_simd_reg_or_minus_one" "Dm, Upa"))
(set (reg:VNx16BI FFRT_REGNUM)
(match_dup 0))]
(unspec:VNx16BI [(match_dup 0)] UNSPEC_WRFFR))]
"TARGET_SVE"
"@
setffr