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[Bug target/69525] New: [6 Regression] ICE: Segmentation fault in ix86_expand_prologue


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69525

            Bug ID: 69525
           Summary: [6 Regression] ICE: Segmentation fault in
                    ix86_expand_prologue
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---
            Target: i?86-*-*

Created attachment 37502
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37502&action=edit
preprocessed source

When building valgrind on x86_64 I get

> ./cc1 -quiet guest_amd64_helpers.i -m32 -O2   -mpreferred-stack-boundary=2 -mtune=generic -march=x86-64
priv/guest_amd64_helpers.c: In function âamd64g_dirtyhelper_AESâ:
priv/guest_amd64_helpers.c:3657:1: internal compiler error: Segmentation fault
0xe4f94a crash_signal
        /space/rguenther/src/svn/trunk3/gcc/toplev.c:335
0x11fcbbc rhs_regno
        /space/rguenther/src/svn/trunk3/gcc/rtl.h:1785
0x1217833 ix86_expand_prologue()
        /space/rguenther/src/svn/trunk3/gcc/config/i386/i386.c:12750
0x149eb00 gen_prologue()
        /space/rguenther/src/svn/trunk3/gcc/config/i386/i386.md:12451
0x11fe196 target_gen_prologue
        /space/rguenther/src/svn/trunk3/gcc/config/i386/i386.md:18466
0xab7610 thread_prologue_and_epilogue_insns()
        /space/rguenther/src/svn/trunk3/gcc/function.c:6037
0xab8834 rest_of_handle_thread_prologue_and_epilogue
        /space/rguenther/src/svn/trunk3/gcc/function.c:6588

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