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The following testcase distilled from Linux kernel on ppc64le ICEs, because fixup_reorder_chain sees a bb with a single fallthru edge falling into a bb with simple return and decides to redirect that fallthru edge to EXIT. That is possible if the bb ending in the fallthru edge doesn't end with a jump or ends with a normal unconditional jump, but not when the bb ends with asm goto which can despite a single fallthru have multiple labels to the fallthrough basic block. The following patch makes sure we never try to redirect such cases to EXIT. 2023-01-03 Jakub Jelinek <jakub@redhat.com> PR rtl-optimization/108263 * cfgrtl.cc (fixup_reorder_chain): Avoid trying to redirect asm goto to EXIT. * gcc.dg/pr108263.c: New test. |
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