83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
/* Test for reload failing to eliminate from argp to sp. */
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/* { dg-do run } */
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/* { dg-require-effective-target ilp32 } */
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/* { dg-require-effective-target nonpic } */
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/* { dg-options "-O2 -fomit-frame-pointer" } */
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static int ustrsize (const char *s);
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static int (*ucwidth) (int c);
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static int (*ugetxc) (const char **s);
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static int (*usetc) (char *s, int c);
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char *ustrzcat(char *dest, int size, const char *src)
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{
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int pos = ustrsize(dest);
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int c;
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size -= pos + ucwidth(0);
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while ((c = ugetxc(&src)) != 0) {
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size -= ucwidth(c);
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if (size < 0)
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break;
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pos += usetc(dest+pos, c);
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}
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usetc(dest+pos, 0);
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return dest;
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}
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static int __attribute__((noinline))
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ustrsize (const char *s)
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{
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return 0;
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}
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static int
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ucwidth_ (int c)
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{
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return 1;
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}
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static int
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ugetxc_ (const char **s)
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{
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return '\0';
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}
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static int
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usetc_ (char *s, int c)
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{
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return 1;
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}
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int
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main()
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{
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ucwidth = ucwidth_;
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ugetxc = ugetxc_;
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usetc = usetc_;
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/* ??? It is impossible to explicitly modify the hard frame pointer.
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This will run afoul of code in flow.c that declines to mark regs
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in eliminate_regs in regs_ever_used. Apparently, we have to wait
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for reload to decide that it won't need a frame pointer before a
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variable can be allocated to %ebp.
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So save, restore, and clobber %ebp by hand. */
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asm ("pushl %%ebp\n\t"
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"movl $-1, %%ebp\n\t"
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"pushl $0\n\t"
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"pushl $0\n\t"
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"pushl $0\n\t"
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"call %P0\n\t"
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"addl $12, %%esp\n\t"
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"popl %%ebp"
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: : "i"(ustrzcat) : "memory" );
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return 0;
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}
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