Hi, The builtin isinf is not folded at front end if the corresponding optab exists. It causes the range evaluation failed on the targets which has optab_isinf. For instance, range-sincos.c will fail on the targets which has optab_isinf as it calls builtin_isinf.
This patch fixed the problem by adding range op for builtin isinf. Bootstrapped and tested on x86 and powerpc64-linux BE and LE with no regressions. Is it OK for the trunk? Thanks Gui Haochen ChangeLog Value Range: Add range op for builtin isinf The builtin isinf is not folded at front end if the corresponding optab exists. So the range op fro isinf is needed for value range analysis. This patch adds range op for builtin isinf. gcc/ * gimple-range-op.cc (class cfn_isinf): New. (op_cfn_isinf): New variables. (gimple_range_op_handler::maybe_builtin_call): Handle CASE_FLT_FN (BUILT_IN_ISINF). gcc/testsuite/ * gcc/testsuite/gcc.dg/tree-ssa/range-isinf.c: New test. patch.diff diff --git a/gcc/gimple-range-op.cc b/gcc/gimple-range-op.cc index a98f7db62a7..9de130b4022 100644 --- a/gcc/gimple-range-op.cc +++ b/gcc/gimple-range-op.cc @@ -1140,6 +1140,57 @@ private: bool m_is_pos; } op_cfn_goacc_dim_size (false), op_cfn_goacc_dim_pos (true); +// Implement range operator for CFN_BUILT_IN_ISINF +class cnf_isinf : public range_operator +{ +public: + using range_operator::fold_range; + using range_operator::op1_range; + virtual bool fold_range (irange &r, tree type, const frange &op1, + const irange &, relation_trio) const override + { + if (op1.undefined_p ()) + return false; + + if (op1.known_isinf ()) + { + r.set_nonzero (type); + return true; + } + + if (op1.known_isnan () + || (!real_isinf (&op1.lower_bound ()) + && !real_isinf (&op1.upper_bound ()))) + { + r.set_zero (type); + return true; + } + + return false; + } + virtual bool op1_range (frange &r, tree type, const irange &lhs, + const frange &, relation_trio) const override + { + if (lhs.zero_p ()) + { + nan_state nan (true); + r.set (type, real_min_representable (type), + real_max_representable (type), nan); + return true; + } + + if (!range_includes_zero_p (&lhs)) + { + // The range is [-INF,-INF][+INF,+INF], but it can't be represented. + // Set range to [-INF,+INF] + r.set_varying (type); + r.clear_nan (); + return true; + } + + return false; + } +} op_cfn_isinf; // Implement range operator for CFN_BUILT_IN_ class cfn_parity : public range_operator @@ -1232,6 +1283,11 @@ gimple_range_op_handler::maybe_builtin_call () m_operator = &op_cfn_signbit; break; + CASE_FLT_FN (BUILT_IN_ISINF): + m_op1 = gimple_call_arg (call, 0); + m_operator = &op_cfn_isinf; + break; + CASE_CFN_COPYSIGN_ALL: m_op1 = gimple_call_arg (call, 0); m_op2 = gimple_call_arg (call, 1); diff --git a/gcc/testsuite/gcc.dg/tree-ssa/range-isinf.c b/gcc/testsuite/gcc.dg/tree-ssa/range-isinf.c new file mode 100644 index 00000000000..468f1bcf5c7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/range-isinf.c @@ -0,0 +1,44 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-evrp" } */ + +#include <math.h> +void link_error(); + +void +test1 (double x) +{ + if (x > __DBL_MAX__ && !__builtin_isinf (x)) + link_error (); + if (x < -__DBL_MAX__ && !__builtin_isinf (x)) + link_error (); +} + +void +test2 (float x) +{ + if (x > __FLT_MAX__ && !__builtin_isinf (x)) + link_error (); + if (x < -__FLT_MAX__ && !__builtin_isinf (x)) + link_error (); +} + +void +test3 (double x) +{ + if (!__builtin_isinf (x) && !__builtin_isnan (x) && x > __DBL_MAX__) + link_error (); + if (!__builtin_isinf (x) && !__builtin_isnan (x) && x < -__DBL_MAX__) + link_error (); +} + +void +test4 (float x) +{ + if (!__builtin_isinf (x) && !__builtin_isnan (x) && x > __FLT_MAX__) + link_error (); + if (!__builtin_isinf (x) && !__builtin_isnan (x) && x < -__FLT_MAX__) + link_error (); +} + +/* { dg-final { scan-tree-dump-not "link_error" "evrp" } } */ +