+2003-10-28 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
+
+ PR target/11598
+ PR libgcj/10610
+ * config/rs6000/sysv4.h (PREFERRED_STACK_BOUNDARY): New macro.
+
2003-10-28 Richard Earnshaw <rearnsha@arm.com>
* arm.c (arm_output_epilogue): When using a frame pointer, don't emit
#undef STACK_BOUNDARY
#define STACK_BOUNDARY (TARGET_ALTIVEC_ABI ? 128 : 64)
+/* Define this macro if you wish to preserve a certain alignment for
+ the stack pointer, greater than what the hardware enforces. The
+ definition is a C expression for the desired alignment (measured
+ in bits). This macro must evaluate to a value equal to or larger
+ than STACK_BOUNDARY.
+ For the SYSV ABI and variants the alignment of the stack pointer
+ is usually controlled manually in rs6000.c. However, to maintain
+ alignment across alloca () in all circumstances,
+ PREFERRED_STACK_BOUNDARY needs to be set as well.
+ This has the additional advantage of allowing a bigger maximum
+ alignment of user objects on the stack. */
+
+#undef PREFERRED_STACK_BOUNDARY
+#define PREFERRED_STACK_BOUNDARY 128
+
/* Real stack boundary as mandated by the appropriate ABI. */
#define ABI_STACK_BOUNDARY ((TARGET_EABI && !TARGET_ALTIVEC_ABI) ? 64 : 128)