diff options
| author | Segher Boessenkool <segher@kernel.crashing.org> | 2019-08-22 21:36:21 +0200 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2019-08-22 21:36:21 +0200 |
| commit | e99bfdd2a8db732ea84cf0a6486707e5e821ad7e (patch) | |
| tree | 454c0a2709201967bc81989ce4ba7a1144785ccf | |
| parent | 71278ecd4e308ce44f804cf4b2e26339b7d6f93f (diff) | |
| download | gcc-e99bfdd2a8db732ea84cf0a6486707e5e821ad7e.zip gcc-e99bfdd2a8db732ea84cf0a6486707e5e821ad7e.tar.gz gcc-e99bfdd2a8db732ea84cf0a6486707e5e821ad7e.tar.bz2 | |
rs6000: Use unspec_volatile for darn (PR91481)
Every call to darn should deliver a *new* random number; such calls
should not be CSEd together. So they should be unspec_volatile, not
plain unspec.
PR target/91481
* config/rs6000/rs6000.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32,
and UNSPEC_DARN_RAW.
(unspecv): New enumerator values UNSPECV_DARN, UNSPECV_DARN_32, and
UNSPECV_DARN_RAW.
(darn_32): Use an unspec_volatile, and UNSPECV_DARN_32.
(darn_raw): Use an unspec_volatile, and UNSPECV_DARN_RAW.
(darn): Use an unspec_volatile, and UNSPECV_DARN.
From-SVN: r274835
| -rw-r--r-- | gcc/ChangeLog | 11 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.md | 12 |
2 files changed, 17 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a9e5668..3ef76ce 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,16 @@ 2019-08-22 Segher Boessenkool <segher@kernel.crashing.org> + PR target/91481 + * config/rs6000/rs6000.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32, + and UNSPEC_DARN_RAW. + (unspecv): New enumerator values UNSPECV_DARN, UNSPECV_DARN_32, and + UNSPECV_DARN_RAW. + (darn_32): Use an unspec_volatile, and UNSPECV_DARN_32. + (darn_raw): Use an unspec_volatile, and UNSPECV_DARN_RAW. + (darn): Use an unspec_volatile, and UNSPECV_DARN. + +2019-08-22 Segher Boessenkool <segher@kernel.crashing.org> + * config/rs6000/altivec.md (unspec): Delete UNSPEC_DARN, UNSPEC_DARN_32, UNSPEC_DARN_RAW, UNSPEC_CMPRB, UNSPEC_CMPRB2, UNSPEC_CMPEQB; move to... * config/rs6000/rs6000.md (unspec): ... here. diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index 68cdf68..b0aea23 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -134,9 +134,6 @@ UNSPEC_LSQ UNSPEC_FUSION_GPR UNSPEC_STACK_CHECK - UNSPEC_DARN - UNSPEC_DARN_32 - UNSPEC_DARN_RAW UNSPEC_CMPRB UNSPEC_CMPRB2 UNSPEC_CMPEQB @@ -168,6 +165,9 @@ UNSPECV_EH_RR ; eh_reg_restore UNSPECV_ISYNC ; isync instruction UNSPECV_MFTB ; move from time base + UNSPECV_DARN ; darn 1 (deliver a random number) + UNSPECV_DARN_32 ; darn 2 + UNSPECV_DARN_RAW ; darn 0 UNSPECV_NLGR ; non-local goto receiver UNSPECV_MFFS ; Move from FPSCR UNSPECV_MFFSL ; Move from FPSCR light instruction version @@ -14387,21 +14387,21 @@ (define_insn "darn_32" [(set (match_operand:SI 0 "register_operand" "=r") - (unspec:SI [(const_int 0)] UNSPEC_DARN_32))] + (unspec_volatile:SI [(const_int 0)] UNSPECV_DARN_32))] "TARGET_P9_MISC" "darn %0,0" [(set_attr "type" "integer")]) (define_insn "darn_raw" [(set (match_operand:DI 0 "register_operand" "=r") - (unspec:DI [(const_int 0)] UNSPEC_DARN_RAW))] + (unspec_volatile:DI [(const_int 0)] UNSPECV_DARN_RAW))] "TARGET_P9_MISC && TARGET_64BIT" "darn %0,2" [(set_attr "type" "integer")]) (define_insn "darn" [(set (match_operand:DI 0 "register_operand" "=r") - (unspec:DI [(const_int 0)] UNSPEC_DARN))] + (unspec_volatile:DI [(const_int 0)] UNSPECV_DARN))] "TARGET_P9_MISC && TARGET_64BIT" "darn %0,1" [(set_attr "type" "integer")]) |