[Bug rtl-optimization/96796] New: aarch64: ICE during RTL pass: reload

[yangyang305 at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96796

            Bug ID: 96796
           Summary: aarch64: ICE during RTL pass: reload
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yangyang305 at huawei dot com
  Target Milestone: ---

Created attachment 49129
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49129&action=edit
ICE testcase

Hi, gcc-9.3.0 ICEs when compiling the attached testcase with -Os on aarch64.

gcc -Os test.i

during RTL pass: reload
test.c: In function ‘func_50.isra.0.constprop’:
test.c:1852:1: internal compiler error: Max. number of generated reload insns
per insn is achieved (90)

0x936ddf lra_constraints(bool)
        ../../gcc-9.3.0/gcc/lra-constraints.c:4901
0x92144f lra(_IO_FILE*)
        ../../gcc-9.3.0/gcc/lra.c:2472
0x8e083f do_reload
        ../../gcc-9.3.0/gcc/ira.c:5523
0x8e083f execute
        ../../gcc-9.3.0/gcc/ira.c:5707
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