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tree-optimization/94266 - fix object type extraction heuristics

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This fixes the heuristic deriving an actual object type from a
MEM_REFs pointer operand to use the more sensible type of an
actual object instead of the pointed to type.

2020-03-20  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/94266
	* gimple-ssa-sprintf.c (get_origin_and_offset): Use the
	type of the underlying object to adjust for the containing
	field if available.
This commit is contained in:
Richard Biener 2020-03-20 10:52:02 +01:00
parent 719c864225
commit 8fefa21fcf
2 changed files with 10 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2020-03-20 Richard Biener <rguenther@suse.de>
PR tree-optimization/94266
* gimple-ssa-sprintf.c (get_origin_and_offset): Use the
type of the underlying object to adjust for the containing
field if available.
2020-03-20 Andre Vieira <andre.simoesdiasvieira@arm.com>
* config/arm/unspecs.md (UNSPEC_GET_FPSCR): Rename this to ...

4
gcc/gimple-ssa-sprintf.c
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@ -2331,7 +2331,9 @@ get_origin_and_offset (tree x, HOST_WIDE_INT *fldoff, HOST_WIDE_INT *off)
if (off)
{
tree xtype = TREE_TYPE (TREE_TYPE (x));
tree xtype
= (TREE_CODE (x) == ADDR_EXPR
? TREE_TYPE (TREE_OPERAND (x, 0)) : TREE_TYPE (TREE_TYPE (x)));
/* The byte offset of the most basic struct member the byte
offset *OFF corresponds to, or for a (multidimensional)