46e3b90f7e
PR tree-optimization/29877 gcc/ * tree-ssa-ter.c (is_replaceable_p): Deem assignments with a register variable on the RHS to not be replaceable. gcc/testsuite/ * gcc.dg/pr16194.c: Skip test entirely if we don't know the name of a hard register for the target concerned. Adjust dg-error directives to cope with new behaviour of TER. From-SVN: r120571
76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
/* { dg-do compile } */
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/* { dg-options "-O" } */
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/* { dg-bogus "internal compiler error" "ICE" { target *-*-* } 0 } */
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#undef SKIP
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#define ASMDECL __asm (REG);
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#define CLOBBER_LIST : REG
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#define INP_CLOBBER_LIST : CLOBBER_LIST
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#if defined (__alpha__)
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# define REG "$1"
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#elif defined (__CRIS__) || defined (__sh__)
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# define REG "r10"
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#elif defined (__i386__)
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# define REG "%eax"
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#elif defined (__MMIX__)
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# define REG "$8"
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#elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) \
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|| defined (__POWERPC__) || defined (PPC) || defined (_IBMR2)
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# define REG "6"
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#elif defined (__x86_64__)
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# define REG "rax"
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#elif defined (__m68k__)
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# define REG "%d0"
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#else
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/* Make this test harmless for any target not recognized above. */
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# define SKIP 1
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#endif
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#ifndef SKIP
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struct A
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{
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int a;
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};
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struct B
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{
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struct A b[3];
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};
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struct C
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{
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struct B c;
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};
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void bug (void)
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{
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register char* dst ASMDECL;
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__asm__ ("":"=g"(*dst): : REG);
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}
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/* The tree optimizers currently prevent us from finding an overlap -
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we end up using a copy of dst rather than dst.
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But at least make sure we don't get an ICE. */
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void bug2 (void)
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{
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register char* dst ASMDECL;
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__asm__ ("": :"g"(*dst) CLOBBER_LIST);
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}
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void
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foo (void)
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{
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register struct C *dst ASMDECL;
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__asm__ ("" : "=g"(dst->c.b[1].a) INP_CLOBBER_LIST);
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}
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#else
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int main ()
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{
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return 0;
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}
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#endif
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