This patch is part of a series that fixes ambiguous attribute
uses in .md files, i.e. cases in which attributes didn't use
<ITER:ATTR> to specify an iterator, and in which <ATTR> could
have different values depending on the iterator chosen.
I think this is a genuine bugfix for Thumb-1, since previously the
LDREX width was taken from the SImode success result rather than the
memory mode:
-#define HAVE_atomic_compare_and_swapt1qi_1 ((TARGET_HAVE_LDREX &&
TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
-#define HAVE_atomic_compare_and_swapt1hi_1 ((TARGET_HAVE_LDREX &&
TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
-#define HAVE_atomic_compare_and_swapt1di_1 ((TARGET_HAVE_LDREX &&
TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
+#define HAVE_atomic_compare_and_swapt1qi_1 ((TARGET_HAVE_LDREXBH &&
TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
+#define HAVE_atomic_compare_and_swapt1hi_1 ((TARGET_HAVE_LDREXBH &&
TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
+#define HAVE_atomic_compare_and_swapt1di_1 ((TARGET_HAVE_LDREXD &&
ARM_DOUBLEWORD_ALIGN \
+ && TARGET_HAVE_MEMORY_BARRIER) && (TARGET_THUMB1))
The same goes for the predicate and constraints in
@atomic_compare_and_swapt1di_1, which previously used the
SI values from the success result.
2019-07-05 Richard Sandiford <richard.sandif...@arm.com>
gcc/
* config/arm/sync.md
(@atomic_compare_and_swap<CCSI:arch><NARROW:mode>_1): Use
<NARROW:sync_predtab> instead of (implicitly) <CCSI:sync_predtab>.
(@atomic_compare_and_swap<CCSI:arch><SIDI:mode>_1): Likewise
<SIDI:sync_predtab>. Use <SIDI:cas_cmp_operand> and
<SIDI:cas_cmp_str>.
Index: gcc/config/arm/sync.md
===================================================================
--- gcc/config/arm/sync.md 2019-07-01 09:37:07.224524452 +0100
+++ gcc/config/arm/sync.md 2019-07-05 15:05:09.088609956 +0100
@@ -201,7 +201,7 @@ (define_insn_and_split "@atomic_compare_
(match_operand:SI 7 "const_int_operand")] ;; mod_f
VUNSPEC_ATOMIC_CAS))
(clobber (match_scratch:SI 8 "=&r,X,X,X"))]
- "<sync_predtab>"
+ "<NARROW:sync_predtab>"
"#"
"&& reload_completed"
[(const_int 0)]
@@ -225,14 +225,14 @@ (define_insn_and_split "@atomic_compare_
(match_operand:SIDI 2 "mem_noofs_operand" "+Ua,Ua,Ua,Ua")) ;;
memory
(set (match_dup 2)
(unspec_volatile:SIDI
- [(match_operand:SIDI 3 "<cas_cmp_operand>"
"<cas_cmp_str>,lIL*h,J,*r") ;; expect
+ [(match_operand:SIDI 3 "<SIDI:cas_cmp_operand>"
"<SIDI:cas_cmp_str>,lIL*h,J,*r") ;; expect
(match_operand:SIDI 4 "s_register_operand" "r,r,r,r") ;;
desired
(match_operand:SI 5 "const_int_operand") ;; is_weak
(match_operand:SI 6 "const_int_operand") ;; mod_s
(match_operand:SI 7 "const_int_operand")] ;; mod_f
VUNSPEC_ATOMIC_CAS))
(clobber (match_scratch:SI 8 "=&r,X,X,X"))]
- "<sync_predtab>"
+ "<SIDI:sync_predtab>"
"#"
"&& reload_completed"
[(const_int 0)]
