[Bug c/32772] New: [4.3 Regression] error: found real variable when subvariables should have appeared

[bunk at stusta dot de]

I got the following compile error when trying to compile Linux kernel
2.6.22-rc6-mm1 with a recent gcc SVN snapshot:

$ /usr/local/DIR/gcc-svn20070715/bin/gcc -Wp,-MD,mm/.page_alloc.o.d  -nostdinc
-isystem /usr/local/DIR/gcc-svn20070715/lib/gcc/i686-pc-linux-gnu/4.3.0/include
-D__KERNEL__ -Iinclude  -include include/linux/autoconf.h -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Werror-implicit-function-declaration -Os
-pipe -msoft-float -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2
 -march=athlon -ffreestanding -maccumulate-outgoing-args -DCONFIG_AS_CFI=1
-DCONFIG_AS_CFI_SIGNAL_FRAME=1 -Iinclude/asm-i386/mach-generic
-Iinclude/asm-i386/mach-default -fno-omit-frame-pointer
-fno-optimize-sibling-calls -fasynchronous-unwind-tables  -fno-stack-protector
-Wdeclaration-after-statement -Wno-pointer-sign    -D"KBUILD_STR(s)=#s"
-D"KBUILD_BASENAME=KBUILD_STR(page_alloc)" 
-D"KBUILD_MODNAME=KBUILD_STR(page_alloc)" -c -o mm/page_alloc.o
mm/page_alloc.c: In function ‘__build_all_zonelists’:
mm/page_alloc.c:2381: error: found real variable when subvariables should have
appeared
while verifying SSA_NAME used_mask_87 in statement
# node_2_cpu_mask_468 = VDEF <node_2_cpu_mask_640>
# node_data_469 = VDEF <node_data_644>
# zone_reclaim_mode_470 = VDEF <zone_reclaim_mode_648>
# policy_zone_471 = VDEF <policy_zone_652>
# node_load_472 = VDEF <node_load_656>
# node_order_473 = VDEF <node_order_660>
# used_mask_87 = VDEF <used_mask_564>
# tmp_474 = VDEF <tmp_664>
# SFT.3392_475 = VDEF <SFT.3392_668>
# SFT.3393_476 = VDEF <SFT.3393_672>
# SMT.3398_196 = VDEF <SMT.3398_251>
D.24412_7->node_zonelists[i.600_23].zlcache_ptr = zlc_26;
...


-- 
           Summary: [4.3 Regression] error: found real variable when
                    subvariables should have appeared
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bunk at stusta dot de
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32772