[PATCH] analyzer: Use __builtin_alloca in gcc.dg/analyzer/call-summaries-2.c

[Rainer Orth]

gcc.dg/analyzer/call-summaries-2.c currently FAILs on Solaris:

FAIL: gcc.dg/analyzer/call-summaries-2.c (test for excess errors)

Excess errors:
/vol/gcc/src/hg/master/local/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c:468:12:
 warning: implicit declaration of function 'alloca' 
[-Wimplicit-function-declaration]
/vol/gcc/src/hg/master/local/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c:468:12:
 warning: incompatible implicit decl

alloca is only declared in <alloca.h>, which isn't included indirectly
anywhere.  To avoid this, I switched the test to use __builtin_alloca
instead, following the vast majority of analyzer tests that use alloca.

Tested no i386-pc-solaris2.11, sparc-sun-solaris2.11, and
x86_64-pc-linux-gnu.

Ok for trunk?

There are a handful of tests that explicitly include <alloca.h> instead,
which is of course an alternative if preferred.

        Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2022-11-23  Rainer Orth  <r...@cebitec.uni-bielefeld.de>

        gcc/testsuite:
        * gcc.dg/analyzer/call-summaries-2.c (uses_alloca): Use
        __builtin_alloca instead of alloca.


diff --git a/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c b/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c
--- a/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c
+++ b/gcc/testsuite/gcc.dg/analyzer/call-summaries-2.c
@@ -465,7 +465,7 @@ int test_returns_external_result (void)
 
 int uses_alloca (int i)
 {
-  int *p = alloca (sizeof (int));
+  int *p = __builtin_alloca (sizeof (int));
   *p = i;
   return *p;
 }