Bug 36791 - ICE with constant argument to __builtin_eh_return
ICE with constant argument to __builtin_eh_return
Status: NEW
Product: gcc
Classification: Unclassified
Component: middle-end
4.3.1
: P3 minor
: ---
Assigned To: Not yet assigned to anyone
: ice-on-valid-code
Depends on:
Blocks:
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Reported: 2008-07-10 14:43 UTC by John F. Carr
Modified: 2008-12-27 22:04 UTC (History)
1 user (show)

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Known to work:
Known to fail:
Last reconfirmed: 2008-12-27 22:04:44


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Description John F. Carr 2008-07-10 14:43:24 UTC
This function causes an ICE in rtl generation:

void g()
{
  __builtin_eh_return(0, 0);
}

The crash happens when either operand to __builtin_eh_return is an integer constant.  expand_builtin_eh_return calls copy_to_reg on a CONST_INT operand.  copy_to_reg generates a register with mode VOIDmode.

I think the fix is to change the two calls to copy_to_reg to copy_addr_to_reg in expand_builtin_eh_return.

This bug seems to be present for many versions and on at least two targets, x86 and SPARC.

Note that with optimization on the same crash may occur if a variable known to hold an integer constant value is passed as the first argument.
Comment 1 Andrew Pinski 2008-12-27 22:04:44 UTC
Confirmed.