[Bug rtl-optimization/91068] New: [10 regression][MIPS] New FAIL: madd-3.c and msub-5.c start with r272849

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91068

            Bug ID: 91068
           Summary: [10 regression][MIPS] New FAIL: madd-3.c and msub-5.c
                    start with r272849
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: paul.hua.gm at gmail dot com
  Target Milestone: ---

The follow test fails between r272831 and r272852.

FAIL: gcc.target/mips/madd-3.c   -O1   scan-assembler-times \\tmadd\\t 3
FAIL: gcc.target/mips/madd-5.c   -O1   scan-assembler-times \\tmadd\\t 4
FAIL: gcc.target/mips/madd-5.c   -O1   scan-assembler-times \\tmflo\\t 3
FAIL: gcc.target/mips/madd-9.c   -O1   scan-assembler \\tmadd\\t
FAIL: gcc.target/mips/madd-9.c   -O1   scan-assembler \\tmult\\t
FAIL: gcc.target/mips/madd-9.c   -O1   scan-assembler-not \\tmul\\t

FAIL: gcc.target/mips/msub-5.c   -O1   scan-assembler-times \\tmflo\\t 3
FAIL: gcc.target/mips/msub-5.c   -O1   scan-assembler-times \\tmsub\\t 4

bisect show start with r272849.