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final_scan_insn and dbxout_block don't aggree about block numbers
- To: gcc-bugs at gcc dot gnu dot org
- Subject: final_scan_insn and dbxout_block don't aggree about block numbers
- From: Andreas Schwab <schwab at suse dot de>
- Date: 13 Sep 1999 16:21:33 +0200
final_scan_insn sometimes sees fewer blocks than dbxout_block. If I
remove anything from the example below the error does not happen. This is
a long standing bug that already exists at least since egcs-2.91.66.
$ cat label.ii
class X { public: ~X(); };
class Y : public X
{
public:
Y (const char *);
int to_int ();
};
int foo (const char *y)
{
int n = ({
int x = 0;
if (__builtin_constant_p (Y(y).to_int()))
__asm__ ("" : "=r" (x) : "r" (Y(y).to_int()));
x; });
}
$ /usr/local/i686-linux/bin/g++ -O -v -g label.ii
Reading specs from /usr/local/i686-linux/lib/gcc-lib/i686-linux/2.96/specs
gcc version 2.96 19990910 (experimental)
/usr/local/i686-linux/lib/gcc-lib/i686-linux/2.96/cc1plus label.ii -quiet -g -O -version -fpreprocessed -o /tmp/ccESGHdA.s
GNU C++ version 2.96 19990910 (experimental) (i686-linux) compiled by GNU C version 2.96 19990909 (experimental).
/usr/local/i686-linux/bin/as -V -Qy -o /tmp/cclt6mZW.o /tmp/ccESGHdA.s
GNU assembler version 2.9.5 (i686-linux) using BFD version 2.9.5
/tmp/ccESGHdA.s: Assembler messages:
/tmp/ccESGHdA.s:88: Error: Subtraction of two symbols in different sections ".LBB7" {*UND* section} - "foo__FPCc" {.text section} at file address 596.
/tmp/ccESGHdA.s:89: Error: Subtraction of two symbols in different sections ".LBE7" {*UND* section} - "foo__FPCc" {.text section} at file address 608.
--
Andreas Schwab "And now for something
schwab@suse.de completely different."
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg