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| author | Richard Biener <rguenther@suse.de> | 2020-03-13 13:56:26 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2020-03-13 13:57:41 +0100 |
| commit | 3604480a6fe493c51d6ebd53d9b1abeebbbb828f (patch) | |
| tree | 79cd68fdbca34d71741f604e3e824a204401071a /gcc | |
| parent | 98ff89d1ac5872f29020fe5b5edfdf5abce59014 (diff) | |
| download | gcc-3604480a6fe493c51d6ebd53d9b1abeebbbb828f.zip gcc-3604480a6fe493c51d6ebd53d9b1abeebbbb828f.tar.gz gcc-3604480a6fe493c51d6ebd53d9b1abeebbbb828f.tar.bz2 | |
tree-optimization/94163 constrain alignment set by PRE
This avoids HWI -> unsigned truncation to end up with zero alignment
which set_ptr_info_alignment ICEs on.
2020-03-13 Richard Biener <rguenther@suse.de>
PR tree-optimization/94163
* tree-ssa-pre.c (create_expression_by_pieces): Check
whether alignment would be zero.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-pre.c | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 679296f..18745fb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2020-03-13 Richard Biener <rguenther@suse.de> + + PR tree-optimization/94163 + * tree-ssa-pre.c (create_expression_by_pieces): Check + whether alignment would be zero. + 2020-03-13 Martin Liska <mliska@suse.cz> PR lto/94157 diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 29987d8..0c1654f 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -2815,7 +2815,8 @@ create_expression_by_pieces (basic_block block, pre_expr expr, unsigned HOST_WIDE_INT hmisalign = args.length () == 3 ? tree_to_uhwi (args[2]) : 0; if ((halign & (halign - 1)) == 0 - && (hmisalign & ~(halign - 1)) == 0) + && (hmisalign & ~(halign - 1)) == 0 + && (unsigned int)halign != 0) set_ptr_info_alignment (get_ptr_info (forcedname), halign, hmisalign); } |