[EMAIL PROTECTED] testsuite]$  
/export/build/gnu/gcc-stack/build-i686-linux/gcc/xgcc
-B/export/build/gnu/gcc-stack/build-i686-linux/gcc/
/net/gnu-6/export/gnu/src/gcc-stack/gcc/libffi/testsuite/libffi.call/cls_16byte.c
 -Os 
-I/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/include
-I/net/gnu-6/export/gnu/src/gcc-stack/gcc/libffi/testsuite/../include 
-I/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/include/..
-L/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/.libs
-L/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libstdc++-v3/src/.libs
 -lffi -lm   -o ./cls_16byte.exe  -Wl,-rpath,../.libs
[EMAIL PROTECTED] testsuite]$ ./cls_16byte.exe
7 8 9 1 9 3: 8 17 12
res: 8 17 12
7 8 9 1 9 3: 8 17 12
res: 8 17 12
[EMAIL PROTECTED] testsuite]$  
/export/build/gnu/gcc-stack/build-i686-linux/gcc/xgcc
-B/export/build/gnu/gcc-stack/build-i686-linux/gcc/
/net/gnu-6/export/gnu/src/gcc-stack/gcc/libffi/testsuite/libffi.call/cls_16byte.c
 -Os 
-I/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/include
-I/net/gnu-6/export/gnu/src/gcc-stack/gcc/libffi/testsuite/../include 
-I/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/include/..
-L/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libffi/.libs
-L/export/build/gnu/gcc-stack/build-i686-linux/i686-pc-linux-gnu/./libstdc++-v3/src/.libs
 -lffi -lm   -o ./cls_16byte.exe  -Wl,-rpath,../.libs -fomit-frame-pointer
[EMAIL PROTECTED] testsuite]$ ./cls_16byte.exe
7 8 9 1 9 3: 8 17 12
res: 8 17 12
7 8 9 1 9 3: 8 17 12
Segmentation fault
[EMAIL PROTECTED] testsuite]$ 

That is because libffi fails to keep stack pointer unchanged after calling
function with structure return value, many libffi test case will fail with
-fomit-frame-pointer on ia32.


-- 
           Summary: libffi doesn't work with -fomit-frame-pointer
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libffi
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34612

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