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Don't treat variable-length vectors as VLAs during gimplification 

Source-level SVE vectors should be gimplified in the same way
as normal fixed-length vectors rather than as VLAs.

This is tested by later SVE patches.

2019-09-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* gimplify.c (gimplify_decl_expr): Use poly_int_tree_p instead
	of checking specifically for INTEGER_CST.

From-SVN: r275870
This commit is contained in:
Richard Sandiford 2019-09-18 09:43:42 +00:00 committed by Richard Sandiford
parent defc6f266c
commit 22b6299199
2 changed files with 9 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-09-18 Richard Sandiford <richard.sandiford@arm.com>
* gimplify.c (gimplify_decl_expr): Use poly_int_tree_p instead
of checking specifically for INTEGER_CST.
2019-09-18 Richard Sandiford <richard.sandiford@arm.com>
* stor-layout.c (compute_record_mode): Operate on poly_uint64

7
gcc/gimplify.c
View File

@ -1754,11 +1754,12 @@ gimplify_decl_expr (tree *stmt_p, gimple_seq *seq_p)
tree init = DECL_INITIAL (decl);
bool is_vla = false;
if (TREE_CODE (DECL_SIZE_UNIT (decl)) != INTEGER_CST
poly_uint64 size;
if (!poly_int_tree_p (DECL_SIZE_UNIT (decl), &size)
|| (!TREE_STATIC (decl)
&& flag_stack_check == GENERIC_STACK_CHECK
&& compare_tree_int (DECL_SIZE_UNIT (decl),
STACK_CHECK_MAX_VAR_SIZE) > 0))
&& maybe_gt (size,
(unsigned HOST_WIDE_INT) STACK_CHECK_MAX_VAR_SIZE)))
{
gimplify_vla_decl (decl, seq_p);
is_vla = true;