[PATCH] Fortran: check types of source expressions before conversion [PR107215]

[Harald Anlauf <anlauf@gmx.de>]

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Dear all,

this PR is an obvious followup to PR107000, where invalid
types appeared in array constructors and lead to an ICE
either in a conversion or reduction of a unary or binary
expression.

The present PR shows that several other conversions need to
be protected by a check of the type of the source expression.

Regtested on x86_64-pc-linux-gnu.  OK for mainline?

Thanks,
Harald


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From 87dae7eb9d4cc76060d258ba99bc53f62c7130f2 Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Tue, 11 Oct 2022 20:37:42 +0200
Subject: [PATCH] Fortran: check types of source expressions before conversion
 [PR107215]

gcc/fortran/ChangeLog:

	PR fortran/107215
	* arith.cc (gfc_int2int): Check validity of type of source expr.
	(gfc_int2real): Likewise.
	(gfc_int2complex): Likewise.
	(gfc_real2int): Likewise.
	(gfc_real2real): Likewise.
	(gfc_complex2int): Likewise.
	(gfc_complex2real): Likewise.
	(gfc_complex2complex): Likewise.
	(gfc_log2log): Likewise.
	(gfc_log2int): Likewise.
	(gfc_int2log): Likewise.

gcc/testsuite/ChangeLog:

	PR fortran/107215
	* gfortran.dg/pr107215.f90: New test.
---
 gcc/fortran/arith.cc                   | 33 ++++++++++++++++++++++++++
 gcc/testsuite/gfortran.dg/pr107215.f90 | 17 +++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 gcc/testsuite/gfortran.dg/pr107215.f90

diff --git a/gcc/fortran/arith.cc b/gcc/fortran/arith.cc
index 086b1f856b1..9e079e42995 100644
--- a/gcc/fortran/arith.cc
+++ b/gcc/fortran/arith.cc
@@ -2040,6 +2040,9 @@ gfc_int2int (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;

+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);

   mpz_set (result->value.integer, src->value.integer);
@@ -2085,6 +2088,9 @@ gfc_int2real (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;

+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);

   mpfr_set_z (result->value.real, src->value.integer, GFC_RND_MODE);
@@ -2116,6 +2122,9 @@ gfc_int2complex (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;

+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_COMPLEX, kind, &src->where);

   mpc_set_z (result->value.complex, src->value.integer, GFC_MPC_RND_MODE);
@@ -2150,6 +2159,9 @@ gfc_real2int (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;

+  if (src->ts.type != BT_REAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);

   gfc_mpfr_to_mpz (result->value.integer, src->value.real, &src->where);
@@ -2196,6 +2208,9 @@ gfc_real2real (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;

+  if (src->ts.type != BT_REAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);

   mpfr_set (result->value.real, src->value.real, GFC_RND_MODE);
@@ -2310,6 +2325,9 @@ gfc_complex2int (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;

+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);

   gfc_mpfr_to_mpz (result->value.integer, mpc_realref (src->value.complex),
@@ -2372,6 +2390,9 @@ gfc_complex2real (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;

+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);

   mpc_real (result->value.real, src->value.complex, GFC_RND_MODE);
@@ -2439,6 +2460,9 @@ gfc_complex2complex (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;

+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_COMPLEX, kind, &src->where);

   mpc_set (result->value.complex, src->value.complex, GFC_MPC_RND_MODE);
@@ -2504,6 +2528,9 @@ gfc_log2log (gfc_expr *src, int kind)
 {
   gfc_expr *result;

+  if (src->ts.type != BT_LOGICAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_LOGICAL, kind, &src->where);
   result->value.logical = src->value.logical;

@@ -2518,6 +2545,9 @@ gfc_log2int (gfc_expr *src, int kind)
 {
   gfc_expr *result;

+  if (src->ts.type != BT_LOGICAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);
   mpz_set_si (result->value.integer, src->value.logical);

@@ -2532,6 +2562,9 @@ gfc_int2log (gfc_expr *src, int kind)
 {
   gfc_expr *result;

+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_LOGICAL, kind, &src->where);
   result->value.logical = (mpz_cmp_si (src->value.integer, 0) != 0);

diff --git a/gcc/testsuite/gfortran.dg/pr107215.f90 b/gcc/testsuite/gfortran.dg/pr107215.f90
new file mode 100644
index 00000000000..2c2a0ca7502
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr107215.f90
@@ -0,0 +1,17 @@
+! { dg-do compile }
+! PR fortran/107215 - ICE in gfc_real2real and gfc_complex2complex
+! Contributed by G.Steinmetz
+
+program p
+  double precision, parameter :: z = 1.0d0
+  complex :: x(1)
+  real    :: y(1)
+  x = [real :: -'1'] * z      ! { dg-error "Operand of unary numeric operator" }
+  y = z * [real :: -'1']      ! { dg-error "Operand of unary numeric operator" }
+  x = [real :: -(.true.)] * z ! { dg-error "Operand of unary numeric operator" }
+  y = z * [real :: -(.true.)] ! { dg-error "Operand of unary numeric operator" }
+  x = [complex :: -'1'] * z   ! { dg-error "Operand of unary numeric operator" }
+  y = z * [complex :: -'1']   ! { dg-error "Operand of unary numeric operator" }
+  x = [complex :: -(.true.)] * z ! { dg-error "Operand of unary numeric operator" }
+  y = z * [complex :: -(.true.)] ! { dg-error "Operand of unary numeric operator" }
+end
--
2.35.3