Hi,
use of 'unsigned int' for i386.c:ix86_compute_frame_layout
stack_alignment_needed results in truncation of frame offset in code such as:
offset = (offset + stack_alignment_needed - 1) & -stack_alignment_needed
(as it is -stack_alignment_needed that is converted to HOST_WIDE_INT).
As a consequence, frames larger than 4GB are squeezed.
Also, the frame field of struct ix86_frame is never used.
Bootstrapped and reg-tested on x86_64 GNU/Linux, without regressions.
Ok for trunk ?
Tristan.
2012-05-15 Tristan Gingold <ging...@adacore.com>
* config/i386/i386.c (struct ix86_frame): Remove unused frame field.
(ix86_compute_frame_layout): Fix type of stack_alignment_needed
and preferred_alignment.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index ad4739b..353ee53 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2408,7 +2408,6 @@ struct ix86_frame
int va_arg_size;
int red_zone_size;
int outgoing_arguments_size;
- HOST_WIDE_INT frame;
/* The offsets relative to ARG_POINTER. */
HOST_WIDE_INT frame_pointer_offset;
@@ -8937,9 +8936,9 @@ ix86_builtin_setjmp_frame_value (void)
static void
ix86_compute_frame_layout (struct ix86_frame *frame)
{
- unsigned int stack_alignment_needed;
+ unsigned HOST_WIDE_INT stack_alignment_needed;
HOST_WIDE_INT offset;
- unsigned int preferred_alignment;
+ unsigned HOST_WIDE_INT preferred_alignment;
HOST_WIDE_INT size = get_frame_size ();
HOST_WIDE_INT to_allocate;
