https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77820
--- Comment #3 from Jeffrey A. Law <law at gcc dot gnu.org> --- Author: law Date: Thu Jun 13 18:55:55 2019 New Revision: 272261 URL: https://gcc.gnu.org/viewcvs?rev=272261&root=gcc&view=rev Log: PR tree-optimization/77820 * tree-ssa-threadedge.c (edge_forwards_cmp_to_conditional_jump_through_empty_bb_p): New function. (thread_across_edge): Add call to edge_forwards_cmp_to_conditional_jump_through_empty_bb_p. PR tree-optimization/77820 * gcc.dg/tree-ssa/phi_on_compare-1.c: New testcase. * gcc.dg/tree-ssa/phi_on_compare-2.c: New testcase. * gcc.dg/tree-ssa/phi_on_compare-3.c: New testcase. * gcc.dg/tree-ssa/phi_on_compare-4.c: New testcase. * gcc.dg/tree-ssa/split-path-6.c: Update testcase. * gcc.target/sh/pr51244-20.c: Update testcase. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/phi_on_compare-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/phi_on_compare-2.c trunk/gcc/testsuite/gcc.dg/tree-ssa/phi_on_compare-3.c trunk/gcc/testsuite/gcc.dg/tree-ssa/phi_on_compare-4.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-6.c trunk/gcc/testsuite/gcc.target/sh/pr51244-20.c trunk/gcc/tree-ssa-threadedge.c