The following adds two RAII classes, one for mpz_t and one for mpfr_t
making object lifetime management easier. Both formerly require
explicit initialization with {mpz,mpfr}_init and release with
{mpz,mpfr}_clear.
I've converted two example places (where lifetime is trivial).
I've sofar only build cc1 with the change. Any comments?
Thanks,
Richard.
* system.h (class auto_mpz): New,
* realmpfr.h (class auto_mpfr): Likewise.
* fold-const-call.cc (do_mpfr_arg1): Use auto_mpfr.
(do_mpfr_arg2): Likewise.
* tree-ssa-loop-niter.cc (bound_difference): Use auto_mpz;
---
gcc/fold-const-call.cc | 8 ++------
gcc/realmpfr.h | 15 +++++++++++++++
gcc/system.h | 14 ++++++++++++++
gcc/tree-ssa-loop-niter.cc | 10 +---------
4 files changed, 32 insertions(+), 15 deletions(-)
diff --git a/gcc/fold-const-call.cc b/gcc/fold-const-call.cc
index 43819c1f984..fa0b287cc8a 100644
--- a/gcc/fold-const-call.cc
+++ b/gcc/fold-const-call.cc
@@ -130,14 +130,12 @@ do_mpfr_arg1 (real_value *result,
int prec = format->p;
mpfr_rnd_t rnd = format->round_towards_zero ? MPFR_RNDZ : MPFR_RNDN;
- mpfr_t m;
- mpfr_init2 (m, prec);
+ auto_mpfr m (prec);
mpfr_from_real (m, arg, MPFR_RNDN);
mpfr_clear_flags ();
bool inexact = func (m, m, rnd);
bool ok = do_mpfr_ckconv (result, m, inexact, format);
- mpfr_clear (m);
return ok;
}
@@ -224,14 +222,12 @@ do_mpfr_arg2 (real_value *result,
int prec = format->p;
mpfr_rnd_t rnd = format->round_towards_zero ? MPFR_RNDZ : MPFR_RNDN;
- mpfr_t m;
- mpfr_init2 (m, prec);
+ auto_mpfr m (prec);
mpfr_from_real (m, arg1, MPFR_RNDN);
mpfr_clear_flags ();
bool inexact = func (m, arg0.to_shwi (), m, rnd);
bool ok = do_mpfr_ckconv (result, m, inexact, format);
- mpfr_clear (m);
return ok;
}
diff --git a/gcc/realmpfr.h b/gcc/realmpfr.h
index 5e032c05f25..2db2ecc94d4 100644
--- a/gcc/realmpfr.h
+++ b/gcc/realmpfr.h
@@ -24,6 +24,21 @@
#include <mpfr.h>
#include <mpc.h>
+class auto_mpfr
+{
+public:
+ auto_mpfr () { mpfr_init (m_mpfr); }
+ explicit auto_mpfr (mpfr_prec_t prec) { mpfr_init2 (m_mpfr, prec); }
+ ~auto_mpfr () { mpfr_clear (m_mpfr); }
+
+ operator mpfr_t& () { return m_mpfr; }
+
+ auto_mpfr (const auto_mpfr &) = delete;
+
+private:
+ mpfr_t m_mpfr;
+};
+
/* Convert between MPFR and REAL_VALUE_TYPE. The caller is
responsible for initializing and clearing the MPFR parameter. */
diff --git a/gcc/system.h b/gcc/system.h
index 64cd5a49258..99f6c410481 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -701,6 +701,20 @@ extern int vsnprintf (char *, size_t, const char *,
va_list);
/* Do not introduce a gmp.h dependency on the build system. */
#ifndef GENERATOR_FILE
#include <gmp.h>
+
+class auto_mpz
+{
+public:
+ auto_mpz () { mpz_init (m_mpz); }
+ ~auto_mpz () { mpz_clear (m_mpz); }
+
+ operator mpz_t& () { return m_mpz; }
+
+ auto_mpz (const auto_mpz &) = delete;
+
+private:
+ mpz_t m_mpz;
+};
#endif
/* Get libiberty declarations. */
diff --git a/gcc/tree-ssa-loop-niter.cc b/gcc/tree-ssa-loop-niter.cc
index dc4c7a418f6..dcfba2fc7ae 100644
--- a/gcc/tree-ssa-loop-niter.cc
+++ b/gcc/tree-ssa-loop-niter.cc
@@ -722,7 +722,6 @@ bound_difference (class loop *loop, tree x, tree y, bounds
*bnds)
tree type = TREE_TYPE (x);
tree varx, vary;
mpz_t offx, offy;
- mpz_t minx, maxx, miny, maxy;
int cnt = 0;
edge e;
basic_block bb;
@@ -754,19 +753,12 @@ bound_difference (class loop *loop, tree x, tree y,
bounds *bnds)
{
/* Otherwise, use the value ranges to determine the initial
estimates on below and up. */
- mpz_init (minx);
- mpz_init (maxx);
- mpz_init (miny);
- mpz_init (maxy);
+ auto_mpz minx, maxx, miny, maxy;
determine_value_range (loop, type, varx, offx, minx, maxx);
determine_value_range (loop, type, vary, offy, miny, maxy);
mpz_sub (bnds->below, minx, maxy);
mpz_sub (bnds->up, maxx, miny);
- mpz_clear (minx);
- mpz_clear (maxx);
- mpz_clear (miny);
- mpz_clear (maxy);
}
/* If both X and Y are constants, we cannot get any more precise. */
--
2.35.3
