https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84064
Bug ID: 84064 Summary: ICE in ix86_expand_prologue related to -fstack-clash-protection and memcpy on i686 Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: target Assignee: law at redhat dot com Reporter: fw at gcc dot gnu.org Target Milestone: --- Target: i686 Compile this with -O2 -m32 -march=i686 -fstack-clash-protection: void f (void *p1, void *p2) { __builtin_memcpy (p1, p2, 1000); } The failing assertion is: /* We expect the GP registers to be saved when probes are used as the probing sequences might need a scratch register and the routine to allocate one assumes the integer registers have already been saved. */ gcc_assert (int_registers_saved); Seen with trunk@257087.