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Re: [patch] Fix PR c++/23089, ICE on incomplete function parameter

From: Mark Mitchell <mark at codesourcery dot com>
To: Volker Reichelt <reichelt at igpm dot rwth-aachen dot de>
Cc: gcc-patches at gcc dot gnu dot org
Date: Mon, 22 Aug 2005 00:55:30 +0100
Subject: Re: [patch] Fix PR c++/23089, ICE on incomplete function parameter
References: <tkrat.baf86037332eee68@igpm.rwth-aachen.de>

Volker Reichelt wrote:

Consider the following C++ testcase:

void foo(struct A) {}

When compiling this with -O we get an ICE after a sensible error message:

  PR23089.cc: In function 'void foo(A)':
  PR23089.cc:1: error: '<anonymous>' has incomplete type
  PR23089.cc:1: error: forward declaration of 'struct A'
  PR23089.cc:1: internal compiler error: in int_mode_for_mode, at stor-layout.c:248

The following patch fixes the ICE by marking the function parameter as
invalid after it has been diagnosed as incomplete. (We already did this
for a void parameter.)

Bootstrapped and regtested on i686-pc-linux-gnu.
Ok for mainline and 4.0 branch (since it's a regression)?

OK.

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304

References:
- [patch] Fix PR c++/23089, ICE on incomplete function parameter
  - From: Volker Reichelt

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