On Thu, Nov 17, 2011 at 8:47 PM, Uros Bizjak <ubiz...@gmail.com> wrote: > Hello! > > Currently, bootstrap crashes with --enable-stage1-checking=all with: > > ../../../libgcc/libgcc2.c:553:3: internal compiler error: tree check: expected > tree that contains ‘typed’ structure, have ‘block’ in fold_checksum_tree, at > fold-const.c:14160 > > The problem is in fold_checksum_tree function itself, when it recurses for > i.e. > > (gdb) p debug_tree (expr) > <bind_expr 0x7ffff1ac6000 > type <void_type 0x7ffff19a5bd0 void VOID > align 8 symtab 0 alias set -1 canonical type 0x7ffff19a5bd0 > pointer_to_this <pointer_type 0x7ffff19a5c78>> > --- > body <decl_expr 0x7ffff1aa3f28 type <void_type 0x7ffff19a5bd0 void> > side-effects arg 0 <var_decl 0x7ffff1ac5140 __w> > 031.c:4:32> > block <block 0x7ffff1ab6f50 used vars <var_decl 0x7ffff1ac5140 __w>> > 031.c:4:23> > > The function decomposes the tree expression with: > > case tcc_expression: > ... > len = TREE_OPERAND_LENGTH (expr); > for (i = 0; i < len; ++i) >>> fold_checksum_tree (TREE_OPERAND (expr, i), ctx, ht); > break; > > where we recurse with "block" expression, that has no type. This > recursion crashes at > > md5_process_bytes (expr, tree_size (expr), ctx); >>> fold_checksum_tree (TREE_TYPE (expr), ctx, ht); > > The fix is fairly trivial - check for typed structure before using > TREE_TYPE accessor, as the error said. > > 2011-11-17 Uros Bizjak <ubiz...@gmail.com> > > PR tree-optimization/51118 > * fold-const.c (fold_checksum_tree): Check for TS_TYPED structure > before using TREE_TYPE accessor on expr. > > Patch was tested by bootstrapping --enable-stage1-checking=all > configured bootstrap (which takes ages...) on x86_64-pc-linux-gnu. > > OK for mainline and release branches?
Ok for trunk. Thanks, Richard. > Uros. >
