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From: Jakub Jelinek <jakub@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-7202] match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499] Date: Fri, 11 Feb 2022 19:27:43 +0000 (GMT) [thread overview] Message-ID: <20220211192743.66AD2385841B@sourceware.org> (raw) https://gcc.gnu.org/g:9355a8c35883b5125851bb9b4169a1a1cd8e343f commit r12-7202-g9355a8c35883b5125851bb9b4169a1a1cd8e343f Author: Jakub Jelinek <jakub@redhat.com> Date: Fri Feb 11 20:27:23 2022 +0100 match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499] The following testcase ICEs on x86_64-linux, because match.pd emits there a NOP_EXPR cast from int*8 vector type with BLKmode to unsigned*8 vector type with BLKmode and vec-lowering isn't prepared to handle such casts. Fixed by using VIEW_CONVERT_EXPR instead. 2022-02-11 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/104499 * match.pd ((X & Y) CMP 0 -> X CMP2 ~Y): Use view_convert instead of convert. * gcc.c-torture/compile/pr104499.c: New test. Diff: --- gcc/match.pd | 2 +- gcc/testsuite/gcc.c-torture/compile/pr104499.c | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/gcc/match.pd b/gcc/match.pd index 0f326233cbb..10f62284862 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -5778,7 +5778,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (if (TYPE_UNSIGNED (TREE_TYPE (@1))) (icmp @0 { csts; }) (with { tree utype = unsigned_type_for (TREE_TYPE (@1)); } - (icmp (convert:utype @0) { csts; })))))))) + (icmp (view_convert:utype @0) { csts; })))))))) /* When one argument is a constant, overflow detection can be simplified. Currently restricted to single use so as not to interfere too much with diff --git a/gcc/testsuite/gcc.c-torture/compile/pr104499.c b/gcc/testsuite/gcc.c-torture/compile/pr104499.c new file mode 100644 index 00000000000..e5d5cddc81c --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr104499.c @@ -0,0 +1,11 @@ +/* PR tree-optimization/104499 */ + +typedef int __attribute__((__vector_size__ (8 * sizeof (int)))) V; + +V v; + +void +foo (void) +{ + v = ((1 | v) != 1); +}
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