diff options
| author | Sylvia Taylor <sylvia.taylor@arm.com> | 2019-07-03 10:57:28 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2019-07-03 10:57:28 +0000 |
| commit | 0e510d1824241953c67b38f7a894de7238c23c61 (patch) | |
| tree | ff23f7ae7ef98f75b63b9afedbba8fbfe3a38ff0 | |
| parent | e676d70449ae990db8ac8d242d54342440f9204a (diff) | |
| download | gcc-0e510d1824241953c67b38f7a894de7238c23c61.zip gcc-0e510d1824241953c67b38f7a894de7238c23c61.tar.gz gcc-0e510d1824241953c67b38f7a894de7238c23c61.tar.bz2 | |
[aarch64]: force frame pointer setup before tlsdesc call
The operation that sets up the tlsdesc register is really a function
call; as such, the frame pointer should really be correctly set up
before this happens. However, because it does not appear as a
call_insn in the RTL the normal dependencies are not added
automatically. We fix this by adding a USE of FP_REGNUM to prevent
migration of the frame-pointer setup past the call by the scheduler.
If a frame pointer is not being used, this is harmless since it only
represents a scheduling constraint.
2019-07-03 Sylvia Taylor <sylvia.taylor@arm.com>
* config/aarch64/aarch64.md (FP_REGNUM): New constant.
(tlsdesc_small_advsimd_<mode>): Add use of FP_REGNUM.
(tlsdesc_small_sve_<mode>): Likewise.
From-SVN: r273000
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.md | 7 |
2 files changed, 11 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5b255ad..68eb338 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2019-07-03 Sylvia Taylor <sylvia.taylor@arm.com> + + * config/aarch64/aarch64.md (FP_REGNUM): New constant. + (tlsdesc_small_advsimd_<mode>): Add use of FP_REGNUM. + (tlsdesc_small_sve_<mode>): Likewise. + 2019-07-03 Martin Liska <mliska@suse.cz> * Makefile.in: Define ZSTD_LIB. diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index 7026b3a..b11bf15 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -120,6 +120,7 @@ ;; Scratch registers used in frame layout. (IP0_REGNUM 16) (IP1_REGNUM 17) + (FP_REGNUM 29) (LR_REGNUM 30) ] ) @@ -6731,7 +6732,8 @@ UNSPEC_TLSDESC)) (clobber (reg:DI LR_REGNUM)) (clobber (reg:CC CC_REGNUM)) - (clobber (match_scratch:DI 1 "=r"))] + (clobber (match_scratch:DI 1 "=r")) + (use (reg:DI FP_REGNUM))] "TARGET_TLS_DESC && !TARGET_SVE" "adrp\\tx0, %A0\;ldr\\t%<w>1, [x0, #%L0]\;add\\t<w>0, <w>0, %L0\;.tlsdesccall\\t%0\;blr\\t%1" [(set_attr "type" "call") @@ -6794,7 +6796,8 @@ (clobber (reg:VNx2BI P13_REGNUM)) (clobber (reg:VNx2BI P14_REGNUM)) (clobber (reg:VNx2BI P15_REGNUM)) - (clobber (match_scratch:DI 1 "=r"))] + (clobber (match_scratch:DI 1 "=r")) + (use (reg:DI FP_REGNUM))] "TARGET_TLS_DESC && TARGET_SVE" "adrp\\tx0, %A0\;ldr\\t%<w>1, [x0, #%L0]\;add\\t<w>0, <w>0, %L0\;.tlsdesccall\\t%0\;blr\\t%1" [(set_attr "type" "call") |