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Handle constant fp classifications in fold-const-call.c 

Move the constant "is finite", "is infinite" and "is nan" queries
to fold-const-call.c.

Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.

gcc/
	* builtins.c (fold_builtin_classify): Move constant cases to...
	* fold-const-call.c (fold_const_call_ss): ...here.

From-SVN: r229920
This commit is contained in:
Richard Sandiford 2015-11-07 10:05:51 +00:00 committed by Richard Sandiford
parent 5486d91300
commit 2556a032cc
3 changed files with 30 additions and 23 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2015-11-07 Richard Sandiford <richard.sandiford@arm.com>
* builtins.c (fold_builtin_classify): Move constant cases to...
* fold-const-call.c (fold_const_call_ss): ...here.
2015-11-07 Richard Sandiford <richard.sandiford@arm.com>
* builtins.h (c_getstr): Move to...

23
gcc/builtins.c
View File

@ -8018,7 +8018,6 @@ static tree
fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index)
{
tree type = TREE_TYPE (TREE_TYPE (fndecl));
REAL_VALUE_TYPE r;
if (!validate_arg (arg, REAL_TYPE))
return NULL_TREE;
@ -8029,16 +8028,6 @@ fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index)
if (!HONOR_INFINITIES (arg))
return omit_one_operand_loc (loc, type, integer_zero_node, arg);
if (TREE_CODE (arg) == REAL_CST)
{
r = TREE_REAL_CST (arg);
if (real_isinf (&r))
return real_compare (GT_EXPR, &r, &dconst0)
? integer_one_node : integer_minus_one_node;
else
return integer_zero_node;
}
return NULL_TREE;
case BUILT_IN_ISINF_SIGN:
@ -8078,24 +8067,12 @@ fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index)
&& !HONOR_INFINITIES (arg))
return omit_one_operand_loc (loc, type, integer_one_node, arg);
if (TREE_CODE (arg) == REAL_CST)
{
r = TREE_REAL_CST (arg);
return real_isfinite (&r) ? integer_one_node : integer_zero_node;
}
return NULL_TREE;
case BUILT_IN_ISNAN:
if (!HONOR_NANS (arg))
return omit_one_operand_loc (loc, type, integer_zero_node, arg);
if (TREE_CODE (arg) == REAL_CST)
{
r = TREE_REAL_CST (arg);
return real_isnan (&r) ? integer_one_node : integer_zero_node;
}
arg = builtin_save_expr (arg);
return fold_build2_loc (loc, UNORDERED_EXPR, type, arg, arg);

25
gcc/fold-const-call.c
View File

@ -736,6 +736,31 @@ fold_const_call_ss (wide_int *result, built_in_function fn,
/* Not yet folded to a constant. */
return false;
CASE_FLT_FN (BUILT_IN_FINITE):
case BUILT_IN_FINITED32:
case BUILT_IN_FINITED64:
case BUILT_IN_FINITED128:
case BUILT_IN_ISFINITE:
*result = wi::shwi (real_isfinite (arg) ? 1 : 0, precision);
return true;
CASE_FLT_FN (BUILT_IN_ISINF):
case BUILT_IN_ISINFD32:
case BUILT_IN_ISINFD64:
case BUILT_IN_ISINFD128:
if (real_isinf (arg))
*result = wi::shwi (arg->sign ? -1 : 1, precision);
else
*result = wi::shwi (0, precision);
return true;
CASE_FLT_FN (BUILT_IN_ISNAN):
case BUILT_IN_ISNAND32:
case BUILT_IN_ISNAND64:
case BUILT_IN_ISNAND128:
*result = wi::shwi (real_isnan (arg) ? 1 : 0, precision);
return true;
default:
return false;
}