On Wed, Apr 9, 2008 at 3:28 AM, DJ Delorie <[EMAIL PROTECTED]> wrote: > > Continuation of the last one, different bug, building libstdc++ ... > Look familiar to anyone? If not, I'll try to hunt down the cause. > The culprit is this line: > > D.25530 = (unsigned int) D.25529; > > For m32cm, "int" is 16 bits, "long" is 32 bits, and "void*" is 24 > bits. A cast to unsigned int truncates a pointer.
What size is the internal 'sizetype'? Is there an integer type with the same width as the pointer type? Basically the problems look like converting a pointer to an integer always either extends or truncates which is both prohibited in the GIMPLE IL (as the pointer doesn't have a sign we don't know whether to sign- or zero-extend it). Richard. > [ gdb ] up > #3 0x085588ec in verify_gimple_2 (stmts=0xb6e7c738) at > ../../gcc/gcc/tree-cfg.c:4126 > 4126 bool err2 = verify_gimple_stmt (stmt); > > [ gdb ] call debug_generic_expr (stmts) > D.25526 = &this->D.17063._vptr.basic_ostream; > D.25527 = *D.25526; > D.25528 = D.25527 + -12; > D.25529 = *D.25528; > D.25530 = (unsigned int) D.25529; > D.25531 = this + D.25530; > *.LTHUNK0 (D.25531); > > > ./cc1plus -fpreprocessed strstream.ii -quiet -dumpbase strstream.cc > -mcpu=m32cm -auxbase-strip strstream.o -g -O2 -Wall -Wextra -Wwrite-strings > -Wcast-qual -Wno-deprecated -version -fno-implicit-templates > -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -o > strstream.s > > #0 verify_gimple_expr (expr=0xb6e79e80) at ../../gcc/gcc/tree-cfg.c:3653 > #1 0x08557d3b in verify_gimple_modify_stmt (stmt=0xb6e7c7c4) at > ../../gcc/gcc/tree-cfg.c:4012 > #2 0x08557ed7 in verify_gimple_stmt (stmt=0xb6e7c7c4) at > ../../gcc/gcc/tree-cfg.c:4045 > #3 0x085588ec in verify_gimple_2 (stmts=0xb6e7c738) at > ../../gcc/gcc/tree-cfg.c:4126 > #4 0x08558943 in verify_gimple_1 (stmts=0xb6e7c738) at > ../../gcc/gcc/tree-cfg.c:4143 > #5 0x0840a079 in gimplify_body (body_p=0xb738da68, fndecl=0xb738da10, > do_parms=1 '\001') > at ../../gcc/gcc/gimplify.c:6536 > #6 0x0840a5b5 in gimplify_function_tree (fndecl=0xb738da10) at > ../../gcc/gcc/gimplify.c:6576 > #7 0x08214aee in c_genericize (fndecl=0xb738da10) at > ../../gcc/gcc/c-gimplify.c:105 > #8 0x081cc445 in cp_genericize (fndecl=0xb738da10) at > ../../gcc/gcc/cp/cp-gimplify.c:774 > #9 0x0807e438 in finish_function (flags=0) at ../../gcc/gcc/cp/decl.c:11923 > #10 0x081759e7 in use_thunk (thunk_fndecl=0xb738da10, emit_p=1 '\001') at > ../../gcc/gcc/cp/method.c:525 > #11 0x081829cd in emit_associated_thunks (fn=0xb738d850) at > ../../gcc/gcc/cp/semantics.c:3157 > #12 0x08762f00 in cgraph_expand_function (node=0xb743bc80) at > ../../gcc/gcc/cgraphunit.c:1156 > #13 0x08765c77 in cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:1220 > #14 0x0810a7fd in cp_write_global_declarations () at > ../../gcc/gcc/cp/decl2.c:3471 > #15 0x08539e6b in toplev_main (argc=23, argv=0xbfad1944) at > ../../gcc/gcc/toplev.c:971 > #16 0x08225332 in main (argc=Cannot access memory at address 0x1 > ) at ../../gcc/gcc/main.c:35 > >
