Mercurial > hg > CbC > CbC_gcc
diff gcc/convert.c @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 24 May 2010 12:47:05 +0900 |
| parents | 77e2b8dfacca |
| children | f6334be47118 |
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--- a/gcc/convert.c Fri Feb 12 23:41:23 2010 +0900 +++ b/gcc/convert.c Mon May 24 12:47:05 2010 +0900 @@ -1,6 +1,6 @@ /* Utility routines for data type conversion for GCC. Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1997, 1998, - 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 + 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. This file is part of GCC. @@ -32,8 +32,6 @@ #include "convert.h" #include "toplev.h" #include "langhooks.h" -#include "real.h" -#include "fixed-value.h" /* Convert EXPR to some pointer or reference type TYPE. EXPR must be pointer, reference, integer, enumeral, or literal zero; @@ -673,6 +671,31 @@ } break; + case TRUNC_DIV_EXPR: + { + tree arg0 = get_unwidened (TREE_OPERAND (expr, 0), type); + tree arg1 = get_unwidened (TREE_OPERAND (expr, 1), type); + + /* Don't distribute unless the output precision is at least as big + as the actual inputs and it has the same signedness. */ + if (outprec >= TYPE_PRECISION (TREE_TYPE (arg0)) + && outprec >= TYPE_PRECISION (TREE_TYPE (arg1)) + /* If signedness of arg0 and arg1 don't match, + we can't necessarily find a type to compare them in. */ + && (TYPE_UNSIGNED (TREE_TYPE (arg0)) + == TYPE_UNSIGNED (TREE_TYPE (arg1))) + /* Do not change the sign of the division. */ + && (TYPE_UNSIGNED (TREE_TYPE (expr)) + == TYPE_UNSIGNED (TREE_TYPE (arg0))) + /* Either require unsigned division or a division by + a constant that is not -1. */ + && (TYPE_UNSIGNED (TREE_TYPE (arg0)) + || (TREE_CODE (arg1) == INTEGER_CST + && !integer_all_onesp (arg1)))) + goto trunc1; + break; + } + case MAX_EXPR: case MIN_EXPR: case MULT_EXPR: