For master, let's change the default; see other recent patch.
Committed to gcc-15 branch.
Pietro, thanks again for the patch that led up to this. This is
in a different place and with different contents, but you made
the first move in this direction so IMHO attribution is in order.
-- >8 --
Besides this commit working as a release-branch fix for the
PR, code inspection shows slightly better code for TImode
libgcc functions, and a modified
gcc.c-torture/execute/arith-rand-ll.c (basically s/long
long/__int128 and cutting out the non-128-bit cases) shows a
1.4% improvement. (Coremark code is identical, as
expected.)
PR middle-end/120935
* config/mmix/mmix.h (MAX_FIXED_MODE_SIZE): Define.
Co-authored-by: Pietro Monteiro <pie...@sociotechnical.xyz>
Signed-off-by: Pietro Monteiro <pie...@sociotechnical.xyz>
---
gcc/config/mmix/mmix.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/config/mmix/mmix.h b/gcc/config/mmix/mmix.h
index 44669e195b4a..354783eccedd 100644
--- a/gcc/config/mmix/mmix.h
+++ b/gcc/config/mmix/mmix.h
@@ -184,6 +184,9 @@ struct GTY(()) machine_function
/* The lower bits are ignored. */
#define STRICT_ALIGNMENT 1
+/* With the default, (64 bits), most things still work, but code for
+ e.g. __int128 will be suboptimal. */
+#define MAX_FIXED_MODE_SIZE (2 * BITS_PER_WORD)
/* Node: Type Layout */
--
2.39.2
