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Stop GCC thinking a shift will overflow.

This commit is contained in:
Andrew Cagney 2000-04-04 04:16:48 +00:00
parent d66c34e293
commit eb90a51f9d
2 changed files with 11 additions and 3 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
Tue Apr 4 12:13:19 2000 Andrew Cagney <cagney@b1.cygnus.com>
* printcmd.c (print_scalar_formatted): Use local variable ptr_bit
in shift. Stop GCC thinking it has a shift overflow.
2000-04-03 H.J. Lu <hjl@gnu.org>
* TODO: Remove the regex entry.

9
gdb/printcmd.c
View File

@ -445,10 +445,13 @@ print_scalar_formatted (valaddr, type, format, size, stream)
case 'a':
{
/* Truncate address to the size of a target pointer, avoiding
shifts larger or equal than the width of a CORE_ADDR. */
shifts larger or equal than the width of a CORE_ADDR. The
local variable PTR_BIT stops the compiler reporting a shift
overflow when it won't occure. */
CORE_ADDR addr = unpack_pointer (type, valaddr);
if (TARGET_PTR_BIT < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
addr &= ((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1;
int ptr_bit = TARGET_PTR_BIT;
if (ptr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
addr &= ((CORE_ADDR) 1 << ptr_bit) - 1;
print_address (addr, stream);
}
break;