[Bug middle-end/24306] [4.0 Regression] va_arg gets confused when skipping over certain zero-sized types with -msse

[howarth at nitro dot med dot uc dot edu]

------- Comment #13 from howarth at nitro dot med dot uc dot edu  2007-12-21 20:45 -------
Reversing the change...

http://gcc.gnu.org/viewcvs/trunk/gcc/builtins.c?r1=108629&r2=108854&pathrev=108854

reduces the failures at -m64 on powerpc-apple-darwin9 from...

Running
/sw/src/fink.build/gcc43-4.2.999-20071219/gcc-4.3-20071219/gcc/testsuite/gcc.dg/compat/struct-layout-1.exp
...
FAIL: tmpdir-gcc.dg-struct-layout-1/t001 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t003 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t005 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t006 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t008 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t016 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t024 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t026 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t028 c_compat_x_tst.o-c_compat_y_tst.o
execute 

...to...

Running
/sw/src/fink.build/gcc43-4.2.999-20071219/gcc-4.3-20071219/gcc/testsuite/gcc.dg/compat/struct-layout-1.exp
...
FAIL: tmpdir-gcc.dg-struct-layout-1/t003 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t005 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t008 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t016 c_compat_x_tst.o-c_compat_y_tst.o
execute 
FAIL: tmpdir-gcc.dg-struct-layout-1/t026 c_compat_x_tst.o-c_compat_y_tst.o
execute 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24306