50 lines
1.9 KiB
Diff
50 lines
1.9 KiB
Diff
2010-06-17 Jakub Jelinek <jakub@redhat.com>
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PR target/44542
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* cfgexpand.c (expand_one_stack_var_at): Limit align to maximum
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of max_used_stack_slot_alignment and PREFERRED_STACK_BOUNDARY
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instead of MAX_SUPPORTED_STACK_ALIGNMENT.
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(expand_one_var): Don't consider DECL_ALIGN for variables for
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which expand_one_stack_var_at has been already called.
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--- gcc/cfgexpand.c.jj 2010-06-17 17:01:11.964198458 +0200
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+++ gcc/cfgexpand.c 2010-06-17 18:25:18.940335757 +0200
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@@ -705,7 +705,7 @@ static void
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expand_one_stack_var_at (tree decl, HOST_WIDE_INT offset)
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{
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/* Alignment is unsigned. */
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- unsigned HOST_WIDE_INT align;
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+ unsigned HOST_WIDE_INT align, max_align;
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rtx x;
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/* If this fails, we've overflowed the stack frame. Error nicely? */
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@@ -722,10 +722,10 @@ expand_one_stack_var_at (tree decl, HOST
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offset -= frame_phase;
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align = offset & -offset;
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align *= BITS_PER_UNIT;
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- if (align == 0)
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- align = STACK_BOUNDARY;
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- else if (align > MAX_SUPPORTED_STACK_ALIGNMENT)
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- align = MAX_SUPPORTED_STACK_ALIGNMENT;
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+ max_align = MAX (crtl->max_used_stack_slot_alignment,
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+ PREFERRED_STACK_BOUNDARY);
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+ if (align == 0 || align > max_align)
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+ align = max_align;
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DECL_ALIGN (decl) = align;
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DECL_USER_ALIGN (decl) = 0;
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@@ -930,6 +930,13 @@ expand_one_var (tree var, bool toplevel,
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align = MINIMUM_ALIGNMENT (TREE_TYPE (var),
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TYPE_MODE (TREE_TYPE (var)),
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TYPE_ALIGN (TREE_TYPE (var)));
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+ else if (DECL_HAS_VALUE_EXPR_P (var)
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+ || (DECL_RTL_SET_P (var) && MEM_P (DECL_RTL (var))))
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+ /* Don't consider debug only variables with DECL_HAS_VALUE_EXPR_P set
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+ or variables which were assigned a stack slot already by
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+ expand_one_stack_var_at - in the latter case DECL_ALIGN has been
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+ changed from the offset chosen to it. */
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+ align = crtl->stack_alignment_estimated;
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else
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align = MINIMUM_ALIGNMENT (var, DECL_MODE (var), DECL_ALIGN (var));
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