re PR middle-end/78691 (ICE compiling Linux boot code)

	PR tree-optimization/78691
	* match.pd ((convert1 (minmax ((convert2 (x) c)))) -> minmax (x c)):
	Require integral type for the outer expression.
	gcc/testsuite
	PR tree-optimization/78691
	* gcc.target/i386/pr78691-i386.c: New test.
	* gcc.target/powerpc/pr78691-ppc.c: New test.

From-SVN: r243335

gcc/ChangeLog

+2016-12-07  Bin Cheng  <bin.cheng@arm.com>
+
+	PR tree-optimization/78691
+	* match.pd ((convert1 (minmax ((convert2 (x) c)))) -> minmax (x c)):
+	Require integral type for the outer expression.
+
 2016-12-07  Naveen H.S  <Naveen.Hurugalawadi@cavium.com>
 
 	* config/aarch64/aarch64.c

gcc/match.pd

@@ -1378,7 +1378,8 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
 (for minmax (min max)
  (simplify
   (convert (minmax@0 (convert @1) INTEGER_CST@2))
-  (if (types_match (@1, type) && int_fits_type_p (@2, type)
+  (if (INTEGRAL_TYPE_P (type)
+       && types_match (@1, type) && int_fits_type_p (@2, type)
        && TYPE_SIGN (TREE_TYPE (@0)) == TYPE_SIGN (type)
        && TYPE_PRECISION (TREE_TYPE (@0)) > TYPE_PRECISION (type))
    (minmax @1 (convert @2)))))

gcc/testsuite/ChangeLog

+2016-12-07  Bin Cheng  <bin.cheng@arm.com>
+
+	PR tree-optimization/78691
+	* gcc.target/i386/pr78691-i386.c: New test.
+	* gcc.target/powerpc/pr78691-ppc.c: New test.
+
 2016-12-07  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* gcc.target/i386/pr70322-1.c: Add -mno-stackrealign to dg-options.

gcc/testsuite/gcc.target/i386/pr78691-i386.c

+/* PR tree-optimization/78691 */
+/* { dg-options "-Os -m16" } */
+
+int fn1(char *p1, char *p2) {
+  int a;
+  for (;;)
+    switch (*p2) {
+    case 'c':
+      while (--a > 0)
+        *p1++ = ' ';
+      p1++;
+      a--;
+    }
+}

gcc/testsuite/gcc.target/powerpc/pr78691-ppc.c

+/* PR tree-optimization/78691 */
+/* { dg-options "-Os -m32" } */
+
+int *b;
+int fn1() {
+  char *c;
+  int a;
+  for (;;)
+    switch (*b) {
+    case 'c':
+      while (--a > 0)
+        *c++ = ' ';
+      c++;
+      if (a)
+        a = sizeof(void *);
+    }
+}
+