Revision: 128707
Author: clattner
Date: 2007-06-21 16:49:16 -0700 (Thu, 21 Jun 2007)
Log Message:
-----------
Check in Rafael's hack that works around PR1521, allowing bootstrap on x86-64.
This should be reverted when PR1521 is fixed.
Modified Paths:
--------------
apple-local/branches/llvm/gcc/c-lex.c
Modified: apple-local/branches/llvm/gcc/c-lex.c
===================================================================
--- apple-local/branches/llvm/gcc/c-lex.c 2007-06-21 23:28:14 UTC (rev
128706)
+++ apple-local/branches/llvm/gcc/c-lex.c 2007-06-21 23:49:16 UTC (rev
128707)
@@ -818,6 +818,36 @@
return itk_none;
}
+/* APPLE LOCAL begin llvm hack for PR1521 */
+#define PART_PRECISION (sizeof (cpp_num_part) * CHAR_BIT)
+/* Sign extend a number, with PRECISION significant bits and all
+ others assumed clear, to fill out a cpp_num structure. */
+static cpp_num
+my_cpp_num_sign_extend (cpp_num num, size_t precision)
+{
+ if (num.high)
+ printf("%lu\n", num.high);
+ if (!num.unsignedp)
+ {
+ if (precision > PART_PRECISION)
+ {
+ precision -= PART_PRECISION;
+ if (precision < PART_PRECISION
+ && (num.high & (cpp_num_part) 1 << (precision - 1)))
+ num.high |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision));
+ }
+ else if (num.low & (cpp_num_part) 1 << (precision - 1))
+ {
+ if (precision < PART_PRECISION)
+ num.low |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision));
+ num.high = ~(cpp_num_part) 0;
+ }
+ }
+
+ return num;
+}
+/* APPLE LOCAL llvm end */
+
/* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */
static tree
interpret_integer (const cpp_token *token, unsigned int flags)
@@ -828,7 +858,8 @@
cpp_options *options = cpp_get_options (parse_in);
integer = cpp_interpret_integer (parse_in, token, flags);
- integer = cpp_num_sign_extend (integer, options->precision);
+ /* APPLE LOCAL llvm hack for PR1521 */
+ integer = my_cpp_num_sign_extend (integer, options->precision);
/* The type of a constant with a U suffix is straightforward. */
if (flags & CPP_N_UNSIGNED)
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