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re PR target/30848 (ICE with invalid constraint in asm statement) 

PR target/30848
        * reg-stack.c (emit_swap_insn): If a malformed asm was seen,
        silently fix up the stack in the case of a missing register.

From-SVN: r122669
This commit is contained in:
Richard Henderson 2007-03-07 10:13:29 -08:00 committed by Richard Henderson
parent 1611915067
commit 7476f0866c
3 changed files with 23 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-03-07 Richard Henderson <rth@redhat.com>
PR target/30848
* reg-stack.c (emit_swap_insn): If a malformed asm was seen,
silently fix up the stack in the case of a missing register.
2007-03-07 Paul Brook <paul@codesourcery.com>
* config/arm/libunwind.S: Add .arch/.object_arch for armv4 builds.

12
gcc/reg-stack.c
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@ -815,9 +815,19 @@ emit_swap_insn (rtx insn, stack regstack, rtx reg)
hard_regno = get_hard_regnum (regstack, reg);
gcc_assert (hard_regno >= FIRST_STACK_REG);
if (hard_regno == FIRST_STACK_REG)
return;
if (hard_regno == -1)
{
/* Something failed if the register wasn't on the stack. If we had
malformed asms, we zapped the instruction itself, but that didn't
produce the same pattern of register sets as before. To prevent
further failure, adjust REGSTACK to include REG at TOP. */
gcc_assert (any_malformed_asm);
regstack->reg[++regstack->top] = REGNO (reg);
return;
}
gcc_assert (hard_regno >= FIRST_STACK_REG);
other_reg = regstack->top - (hard_regno - FIRST_STACK_REG);

6
gcc/testsuite/gcc.target/i386/pr30848.c Normal file
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@ -0,0 +1,6 @@
/* { dg-do compile } */
void foo(double d)
{
__asm__ ("" : "=u" (d)); /* { dg-error "output regs" } */
}