[Bug middle-end/71732] New: FAIL: gcc.dg/torture/pr71532.c at -O2 and above

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71732

            Bug ID: 71732
           Summary: FAIL: gcc.dg/torture/pr71532.c at -O2 and above
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: danglin at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org, law at gcc dot gnu.org
  Target Milestone: ---
              Host: hppa*-*-* (32 bit)
            Target: hppa*-*-* (32 bit)
             Build: hppa*-*-* (32 bit)

Created attachment 38816
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38816&action=edit
assembler output

The following fails of gcc.dg/torture/pr71532.c occur on 32-bit hppa:

FAIL: gcc.dg/torture/pr71532.c   -O2  execution test
FAIL: gcc.dg/torture/pr71532.c   -O2 -flto -fno-use-linker-plugin
-flto-partition=none  execution test
FAIL: gcc.dg/torture/pr71532.c   -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/pr71532.c   -O3 -g  execution test
FAIL: gcc.dg/torture/pr71532.c   -Os  execution test

Looking at the -O2 build, it appears the last argument passed on the stack
to bar is off by one:

(gdb) x/32x $sp-128
0xfd703380:     0x000f2000      0xfcc56b20      0x00011146      0x0001110c
0xfd703390:     0x000101e8      0x00117488      0x00000000      0x000f2000
0xfd7033a0:     0xfcc56b20      0x00011146      0x00000000      0x000103d3
0xfd7033b0:     0x0000000d      0x0000000b      0x0000000a      0x00000009
0xfd7033c0:     0x00000008      0x00000007      0x00000006      0x00000005
0xfd7033d0:     0x00000005      0x00000004      0x00000003      0x00000002
0xfd7033e0:     0xfd47e3c8      0x00000000      0xfd47c1ac      0x00010a1b
0xfd7033f0:     0x00000000      0x00000000      0x00000000      0x00000000
(gdb) p/x $sp
$7 = 0xfd703400
(gdb) bt
#0  bar (a=a@entry=1, b=b@entry=2, c=c@entry=3, d=d@entry=4, 
    e=<optimized out>, f=<optimized out>, g=<optimized out>, 
    h=<optimized out>, i=<optimized out>, j=<optimized out>, 
    k=<optimized out>, l=<optimized out>)
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/torture/pr71532.c:17
#1  0x00010a4c in test ()
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/torture/pr71532.c:29
#2  0x00010410 in main ()
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/torture/pr71532.c:36
(gdb) p $r26
$8 = 1
(gdb) p $r25
$9 = 2
(gdb) p $r24
$10 = 3
(gdb) p $r23
$11 = 4

The stack argument slots start at 0xfd7033dc and go to 0xfd7033b0.  The first
four arguments are passed in r26-r23 and are reserved for use by callee.  They
are not set by caller.

Need to look at argument setup in test.