https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61306
--- Comment #6 from thopre01 at gcc dot gnu.org --- Author: thopre01 Date: Wed Jun 11 10:04:33 2014 New Revision: 211444 URL: http://gcc.gnu.org/viewcvs?rev=211444&root=gcc&view=rev Log: 2014-06-11 Thomas Preud'homme <thomas.preudho...@arm.com> gcc/ PR tree-optimization/61306 * tree-ssa-math-opts.c (struct symbolic_number): Store type of expression instead of its size. (do_shift_rotate): Adapt to change in struct symbolic_number. Return false to prevent optimization when the result is unpredictable due to arithmetic right shift of signed type with highest byte is set. (verify_symbolic_number_p): Adapt to change in struct symbolic_number. (init_symbolic_number): Likewise. (find_bswap_or_nop_1): Likewise. Return NULL to prevent optimization when the result is unpredictable due to sign extension. gcc/testsuite/ * gcc.c-torture/execute/pr61306-1.c: New test. * gcc.c-torture/execute/pr61306-2.c: Likewise. * gcc.c-torture/execute/pr61306-3.c: Likewise. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr61306-1.c trunk/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c trunk/gcc/testsuite/gcc.c-torture/execute/pr61306-3.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-math-opts.c
