[gcc r12-6587] i386: Mark some of strict_low_part insn constraints earlyclobbered

[gcc r12-6587] i386: Mark some of strict_low_part insn constraints earlyclobbered

[Uros Bizjak]

https://gcc.gnu.org/g:ffb7d4b2b76746e4189979f9d27d80be2195308a

commit r12-6587-gffb7d4b2b76746e4189979f9d27d80be2195308a
Author: Uros Bizjak <ubizjak@gmail.com>
Date:   Fri Jan 14 16:05:17 2022 +0100

    i386: Mark some of strict_low_part insn constraints earlyclobbered
    
    While there is practically impossible that input registers are matched
    with in-out register, better mark the output operand of the split alternative
    as earlyclobbered - we do output early to the output operand when
    the insn is split.
    
    2022-01-14  Uroš Bizjak  <ubizjak@gmail.com>
    
    gcc/ChangeLog:
    
            * config/i386/i386.md (*add<mode>_1_slp"):
            Mark alternative 1 output operand earlyclobbered.
            (*sub<mode>_1_slp): Ditto.
            (*and<mode>_1_slp): Ditto.
            (*<code><mode>_1_slp): Ditto.
            (*neg<mode>_1_slp): Ditto.
            (*one_cmpl<mode>_1_slp): Ditto.
            (*ashl<mode>3_1_slp): Ditto.
            (*<insn><mode>3_1_slp): Ditto.
            (*<insn><mode>3_1_slp): Ditto.

Diff:
---
 gcc/config/i386/i386.md | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 9477ca9b41d..7b1694314ea 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -5902,7 +5902,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*add<mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(plus:SWI12 (match_operand:SWI12 1 "nonimmediate_operand" "%0,!<r>")
 		    (match_operand:SWI12 2 "general_operand" "<r>mn,<r>mn")))
    (clobber (reg:CC FLAGS_REG))]
@@ -6856,7 +6856,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*sub<mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(minus:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")
 		     (match_operand:SWI12 2 "general_operand" "<r>mn,<r>mn")))
    (clobber (reg:CC FLAGS_REG))]
@@ -9905,7 +9905,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*and<mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(and:SWI12 (match_operand:SWI12 1 "nonimmediate_operand" "%0,!<r>")
 		   (match_operand:SWI12 2 "general_operand" "<r>mn,<r>mn")))
    (clobber (reg:CC FLAGS_REG))]
@@ -10542,7 +10542,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*<code><mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(any_or:SWI12 (match_operand:SWI12 1 "nonimmediate_operand" "%0,!<r>")
 		      (match_operand:SWI12 2 "general_operand" "<r>mn,<r>mn")))
    (clobber (reg:CC FLAGS_REG))]
@@ -10896,7 +10896,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*neg<mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(neg:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")))
    (clobber (reg:CC FLAGS_REG))]
   "!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun)"
@@ -11489,7 +11489,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*one_cmpl<mode>_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(not:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")))]
   "!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun)"
   "@
@@ -12185,7 +12185,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*ashl<mode>3_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(ashift:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")
 		      (match_operand:QI 2 "nonmemory_operand" "cI,cI")))
    (clobber (reg:CC FLAGS_REG))]
@@ -13062,7 +13062,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*<insn><mode>3_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(any_shiftrt:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")
 			   (match_operand:QI 2 "nonmemory_operand" "cI,cI")))
    (clobber (reg:CC FLAGS_REG))]
@@ -13606,7 +13606,7 @@
 
 ;; Alternative 1 is needed to work around LRA limitation, see PR82524.
 (define_insn_and_split "*<insn><mode>3_1_slp"
-  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,<r>"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand" "+<r>,&<r>"))
 	(any_rotate:SWI12 (match_operand:SWI12 1 "register_operand" "0,!<r>")
 			  (match_operand:QI 2 "nonmemory_operand" "cI,cI")))
    (clobber (reg:CC FLAGS_REG))]