https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69454
--- Comment #30 from H.J. Lu <hjl.tools at gmail dot com> ---
Try this one:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a03a515..c82883e 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -3588,16 +3588,6 @@ convert_scalars_to_vector ()
bitmap_obstack_release (NULL);
df_process_deferred_rescans ();
- /* Conversion means we may have 128bit register spills/fills
- which require aligned stack. */
- if (converted_insns)
- {
- if (crtl->stack_alignment_needed < 128)
- crtl->stack_alignment_needed = 128;
- if (crtl->stack_alignment_estimated < 128)
- crtl->stack_alignment_estimated = 128;
- }
-
return 0;
}
@@ -29300,8 +29290,10 @@ ix86_minimum_alignment (tree exp, machine_mode mode,
return align;
/* Don't do dynamic stack realignment for long long objects with
- -mpreferred-stack-boundary=2. */
- if ((mode == DImode || (type && TYPE_MODE (type) == DImode))
+ -mpreferred-stack-boundary=2. The STV pass needs 64-bit alignment
+ for DImode. */
+ if (!(TARGET_STV && TARGET_SSE2 && optimize > 1)
+ && (mode == DImode || (type && TYPE_MODE (type) == DImode))
&& (!type || !TYPE_USER_ALIGN (type))
&& (!decl || !DECL_USER_ALIGN (decl)))
return 32;
