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Date: Sun, 03 Nov 2002 05:36:00 -0000
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Subject: other/8437: GCC 3.2 don't produces builtin code for __builtin_alloca
X-SW-Source: 2002-11/txt/msg00125.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         8437
>Category:       other
>Synopsis:       GCC 3.2 don't produces builtin code for __builtin_alloca
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          pessimizes-code
>Submitter-Id:   net
>Arrival-Date:   Sun Nov 03 05:36:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Benjamin Kalytta
>Release:        GCC 3.2
>Organization:
>Environment:
cygwin (v. 1.1.8) x86/AMD Athlon XP2200+ - Windows 2000 Prof.
>Description:
GCC don't create builtin function __builtin_alloca as builtin, but instead it creates an external definition in objectfile to __alloca (usually a libgcc libary function).

How to repeat:
#define alloca(n) __builtin_alloca((n))
int main() {
	char *p=alloca(10);
	return (int)p;
}
>How-To-Repeat:
Any of this:
gcc -c test.c
gcc -fbuiltin -fhosted -c test.c
gcc -fhosted -c test.c
gcc -fno-builtin -c test.c
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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