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| author | Mihail Ionescu <mihail.ionescu@arm.com> | 2020-01-15 10:38:44 +0000 |
|---|---|---|
| committer | Mihail Ionescu <mihail.ionescu@arm.com> | 2020-01-16 15:11:29 +0000 |
| commit | 9722215a027b68651c3c7a8af9204d033197e9c0 (patch) | |
| tree | e2e988f8d34299431fdecc2c6ddd7de939f5986b /gcc/predict.c | |
| parent | e0e4be48a9892195f11d1b608793c3a30b640f54 (diff) | |
| download | gcc-9722215a027b68651c3c7a8af9204d033197e9c0.zip gcc-9722215a027b68651c3c7a8af9204d033197e9c0.tar.gz gcc-9722215a027b68651c3c7a8af9204d033197e9c0.tar.bz2 | |
[PATCH, GCC/ARM, 4/10] Clear GPR with CLRM
This patch adds a new pattern for the CLRM instruction and guards the
current clearing code in output_return_instruction() and thumb_exit()
on Armv8.1-M Mainline instructions not being present.
cmse_clear_registers () is then modified to use the new CLRM instruction
when targeting Armv8.1-M Mainline while keeping Armv8-M register
clearing code for VFP registers.
For the CLRM instruction, which does not mandated APSR in the register
list, checking whether it is the right volatile unspec or a clearing
register is done in clear_operation_p.
Note that load/store multiple were deemed sufficiently different in
terms of RTX structure compared to the CLRM pattern for a different
function to be used to validate the match_parallel.
ChangeLog entries are as follows:
*** gcc/ChangeLog ***
2020-01-16 Mihail-Calin Ionescu <mihail.ionescu@arm.com>
2020-01-16 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/arm-protos.h (clear_operation_p): Declare.
* config/arm/arm.c (clear_operation_p): New function.
(cmse_clear_registers): Generate clear_multiple instruction pattern if
targeting Armv8.1-M Mainline or successor.
(output_return_instruction): Only output APSR register clearing if
Armv8.1-M Mainline instructions not available.
(thumb_exit): Likewise.
* config/arm/predicates.md (clear_multiple_operation): New predicate.
* config/arm/thumb2.md (clear_apsr): New define_insn.
(clear_multiple): Likewise.
* config/arm/unspecs.md (VUNSPEC_CLRM_APSR): New volatile unspec.
*** gcc/testsuite/ChangeLog ***
2020-01-16 Mihail-Calin Ionescu <mihail.ionescu@arm.com>
2020-01-16 Thomas Preud'homme <thomas.preudhomme@arm.com>
* gcc.target/arm/cmse/bitfield-1.c: Add check for CLRM.
* gcc.target/arm/cmse/bitfield-2.c: Likewise.
* gcc.target/arm/cmse/bitfield-3.c: Likewise.
* gcc.target/arm/cmse/struct-1.c: Likewise.
* gcc.target/arm/cmse/cmse-14.c: Likewise.
* gcc.target/arm/cmse/cmse-1.c: Likewise. Restrict checks for Armv8-M
GPR clearing when CLRM is not available.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-4.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-5.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-6.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-7.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-8.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/bitfield-9.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard-sp/cmse-13.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard-sp/cmse-5.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard-sp/cmse-7.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard-sp/cmse-8.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard/cmse-13.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard/cmse-5.c: likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard/cmse-7.c: likewise.
* gcc.target/arm/cmse/mainline/8_1m/hard/cmse-8.c: likewise.
* gcc.target/arm/cmse/mainline/8_1m/soft/cmse-13.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/soft/cmse-5.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/soft/cmse-7.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/soft/cmse-8.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp-sp/cmse-5.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp-sp/cmse-7.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp-sp/cmse-8.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp/cmse-13.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp/cmse-5.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp/cmse-7.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/softfp/cmse-8.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/union-1.c: Likewise.
* gcc.target/arm/cmse/mainline/8_1m/union-2.c: Likewise.
Diffstat (limited to 'gcc/predict.c')
0 files changed, 0 insertions, 0 deletions