[Bug optimization/15114] [3.4/3.5 regression] -funit-at-a-time causes compilation of functions with variable length arrays to fail

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-25 13:56 -------
It has nothing to do with getting the parameter decls mixed up but the problem is that the RTL for the 
parameter has not be made yet, why it works with one function is most likely unit-at-a-time acts as 
non-unit-at-a-time mode. 


Breakpoint 4, expand_expr_real_1 (exp=0x41650180, target=0x41654738, tmode=VOIDmode, 
modifier=EXPAND_NORMAL, alt_rtl=0x0) at /Users/pinskia/src/gcc-tree-ssa/gcc/gcc/expr.c:6510
6510          if (!DECL_RTL_SET_P (exp))
(gdb) p debug_generic_expr (exp)
n<D1083>
$1 = void
(gdb) continue
Continuing.

Breakpoint 4, expand_expr_real_1 (exp=0x41650180, target=0x41654768, tmode=VOIDmode, 
modifier=EXPAND_NORMAL, alt_rtl=0x0) at /Users/pinskia/src/gcc-tree-ssa/gcc/gcc/expr.c:6510
6510          if (!DECL_RTL_SET_P (exp))
(gdb) p debug_generic_expr (exp)
n<D1083>
$2 = void
(gdb) continue
Continuing.

Breakpoint 4, expand_expr_real_1 (exp=0x41650780, target=0x41654798, tmode=VOIDmode, 
modifier=EXPAND_NORMAL, alt_rtl=0x0) at /Users/pinskia/src/gcc-tree-ssa/gcc/gcc/expr.c:6510
6510          if (!DECL_RTL_SET_P (exp))
(gdb) p debug_generic_expr (exp)
n<D1087>
$3 = void
(gdb) continue
Continuing.

pr15114.c: In function `foo':
pr15114.c:2: error: prior parameter's size depends on 'n'

Breakpoint 4, expand_expr_real_1 (exp=0x41650780, target=0x416547c8, tmode=VOIDmode, 
modifier=EXPAND_NORMAL, alt_rtl=0x0) at /Users/pinskia/src/gcc-tree-ssa/gcc/gcc/expr.c:6510
6510          if (!DECL_RTL_SET_P (exp))
(gdb) p debug_generic_expr (exp)
n<D1087>
$4 = void
(gdb) continue

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15114