[Bug rtl-optimization/80401] New: [7 regression] gcc.target/powerpc/dimode_off.c and gcc.target/powerpc/pr79038-1.c fail starting with r246764

["seurer at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80401

            Bug ID: 80401
           Summary: [7 regression] gcc.target/powerpc/dimode_off.c and
                    gcc.target/powerpc/pr79038-1.c fail starting with
                    r246764
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

The failing tests are looking for specific assembler instructions (or lack of
them) and the revision changed lots of generated code sequences.  For instance,
in dimode_off it changes

        addi 9,3,32767
        std 4,0(9)

to

        mtvsrd 0,4
        stfd 0,32767(3)


Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/   -fno-diagnostics-show-caret
-fdiagnostics-color=never  -O2 -fno-align-functions -mtraceback=no -save-temps
-ffat-lto-objects -c   -o dimode_off.o
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/dimode_off.c   
(timeout = 300)
spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/ -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -fno-align-functions -mtraceback=no -save-temps
-ffat-lto-objects -c -o dimode_off.o
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/dimode_off.c
PASS: gcc.target/powerpc/dimode_off.c (test for excess errors)
size is size
Executing on host: size dimode_off.o   (timeout = 300)
spawn size dimode_off.o
   text    data     bss     dec     hex filename
    440       0       0     440     1b8 dimode_off.o
text size is 440
PASS: gcc.target/powerpc/dimode_off.c object-size text == 440
FAIL: gcc.target/powerpc/dimode_off.c scan-assembler-not (st|l)fd


Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/pr79038-1.c  
-fno-diagnostics-show-caret -fdiagnostics-color=never  -mcpu=power9 -O2
-mfloat128 -ffat-lto-objects -S   -o pr79038-1.s    (timeout = 300)
spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/pr79038-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -mcpu=power9 -O2
-mfloat128 -ffat-lto-objects -S -o pr79038-1.s
PASS: gcc.target/powerpc/pr79038-1.c (test for excess errors)
FAIL: gcc.target/powerpc/pr79038-1.c scan-assembler \\mlxsi[bh]zx\\M
PASS: gcc.target/powerpc/pr79038-1.c scan-assembler \\mvexts[bh]2d\\M
PASS: gcc.target/powerpc/pr79038-1.c scan-assembler-not \\mextsb\\M
FAIL: gcc.target/powerpc/pr79038-1.c scan-assembler-not \\ml[bh][az]\\M
FAIL: gcc.target/powerpc/pr79038-1.c scan-assembler-not \\mmtvsrw[az]\\M