From: Richard Biener <rguenther@suse.de>
Date: Mon, 15 Dec 2014 13:01:47 +0000 (+0000)
Subject: re PR tree-optimization/64295 (ICE: SIGSEGV (infinite recursion) with -frounding... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=249700b5f180c66cab7ea3914db89ac77c6e1e25;p=gcc.git

re PR tree-optimization/64295 (ICE: SIGSEGV (infinite recursion) with -frounding-math -funsafe-math-optimizations)

2014-12-15  Richard Biener  <rguenther@suse.de>

	PR middle-end/64295
	* match.pd (X / CST -> X * (1 / CST): Use const_binop instead of
	fold_binary to compute the constant to multiply with.

	* gcc.dg/pr64295.c: New testcase.

From-SVN: r218748
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6683625fdff..3e3eda67b24 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-12-15  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/64295
+	* match.pd (X / CST -> X * (1 / CST): Use const_binop instead of
+	fold_binary to compute the constant to multiply with.
+
 2014-12-15  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/64246
diff --git a/gcc/match.pd b/gcc/match.pd
index 4ccb41a2366..083d65f9ee1 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -186,7 +186,7 @@ along with GCC; see the file COPYING3.  If not see
    (if (flag_reciprocal_math
 	&& !real_zerop (@1))
     (with
-     { tree tem = fold_binary (RDIV_EXPR, type, build_one_cst (type), @1); }
+     { tree tem = const_binop (RDIV_EXPR, type, build_one_cst (type), @1); }
      (if (tem)
       (mult @0 { tem; } ))))
    (if (cst != COMPLEX_CST)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8ed52f96660..a4b8957fd99 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2014-12-15  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/64295
+	* gcc.dg/pr64295.c: New testcase.
+
 2014-12-15  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/64246
diff --git a/gcc/testsuite/gcc.dg/pr64295.c b/gcc/testsuite/gcc.dg/pr64295.c
new file mode 100644
index 00000000000..4882f3254e4
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr64295.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O -frounding-math -funsafe-math-optimizations" } */
+
+double
+f (double g)
+{
+  return g / 3;
+}