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Re: c/8730: [3.2/3.3 regression] Cannot compile C function inside other C function
- From: reichelt at igpm dot rwth-aachen dot de
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, ilgis at num dot uni-sb dot de, info at ilghiz dot com, nobody at gcc dot gnu dot org
- Date: 28 Nov 2002 01:46:00 -0000
- Subject: Re: c/8730: [3.2/3.3 regression] Cannot compile C function inside other C function
- Reply-to: reichelt at igpm dot rwth-aachen dot de, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, ilgis at num dot uni-sb dot de, info at ilghiz dot com, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Old Synopsis: Cannot compile C function inside other C function
New Synopsis: [3.2/3.3 regression] Cannot compile C function inside other C function
State-Changed-From-To: open->analyzed
State-Changed-By: reichelt
State-Changed-When: Wed Nov 27 17:46:00 2002
State-Changed-Why:
Confirmed.
The code seems to trigger two different bugs:
The following distilled code snippet crashes gcc 2.95.x and 3.0.x:
-------------------------snip here---------------------------
void baz(int i);
void foo(int i, int A[i+1])
{
int j=A[i];
void bar() { baz(A[i]); }
}
-------------------------snip here---------------------------
The error message (when compiled with "gcc -O -c") is:
PR8730B.c: In function `foo':
PR8730B.c:7: Internal compiler error in `instantiate_virtual_regs_1', at function.c:3881
Please submit a full bug report. [etc.]
But this problem was apparently fixed in gcc 3.1.
The second problem is triggered with the following code snippet:
-------------------------snip here---------------------------
void foo()
{
void* bar(int i, int A[1][i]) { return A[0]; }
}
-------------------------snip here---------------------------
The error message (when compiled with "gcc -c") is:
PR8730A.c: In function `bar':
PR8730A.c:3: internal compiler error: in expand_expr, at expr.c:6771
Please submit a full bug report, [etc.]
This snippet compiles with gcc 2.95.3, but crashes since 3.0.
Therefore, we have a regression.
(Checked on i686-pc-linux-gnu.)
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8730