[Bug bootstrap/44699] [4.6 Regression] Bootstrap failure for x86_64-apple-darwin10: ICE while compiling genmodes.c

["dominiq at lps dot ens dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #13 from dominiq at lps dot ens dot fr  2010-06-29 22:40 -------
Created an attachment (id=21042)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21042&action=view)
preprocessed tree.i

The patch in http://gcc.gnu.org/ml/gcc-patches/2010-06/msg03011.html fixes the
reported ICE but causes a new one with tree.c:

[macbook] build_w/gcc% /opt/gcc/build_w/prev-gcc/xgcc
-B/opt/gcc/build_w/prev-gcc/ -c -O2 -DIN_GCC -DHAVE_CONFIG_H -I. -I.
-I../../work/gcc -I../../work/gcc/. -I../../work/include
-I../../work/libcpp/include -I/opt/sw64/include ../../work/gcc/tree.c
../../work/gcc/tree.c: In function 'build_real':
../../work/gcc/tree.c:1441:1: internal compiler error: Segmentation fault

The backtrace for tree.i is

Reason: KERN_INVALID_ADDRESS at address: 0x000000000000000c
0x0000000100ad23c0 in useless_type_conversion_p ()
(gdb) bt
#0  0x0000000100ad23c0 in useless_type_conversion_p ()
#1  0x0000000100a0035a in may_propagate_copy ()
#2  0x0000000100a8863d in replace_phi_args_in ()
#3  0x0000000100a889cc in substitute_and_fold ()
#4  0x0000000100b3c2e1 in vrp_finalize ()
#5  0x0000000100b3c440 in execute_vrp ()
#6  0x00000001007e24fa in execute_one_pass ()
#7  0x00000001007e28eb in execute_pass_list ()
#8  0x00000001007e2909 in execute_pass_list ()
#9  0x000000010099668b in tree_rest_of_compilation ()
#10 0x0000000100c2b2f6 in cgraph_expand_function ()
#11 0x0000000100c2b58d in cgraph_expand_all_functions ()
#12 0x0000000100c2bc5f in cgraph_optimize ()
#13 0x0000000100c292e9 in cgraph_finalize_compilation_unit ()
#14 0x000000010002ef94 in c_write_global_declarations ()
#15 0x00000001008fbeb9 in compile_file ()
#16 0x00000001008fe96b in do_compile ()
#17 0x00000001008fea35 in toplev_main ()
#18 0x000000010010d450 in main ()


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44699