[PATCH, testsuite]: PR 82828: Fix invalid gcc.target/i386/pr70263-2.c testcase

[Uros Bizjak]

Hello!

This testcase uses undefined values. Attached patch fixes the
testcase; the scan for message in the RTL dump assures us that the fix
for PR 70263 still performs its magic.

2017-11-03  Uros Bizjak  <ubiz...@gmail.com>

    PR testsuite/82828
    PR rtl-optimization/70263
    * gcc.target/i386/pr70263-2.c: Fix invalid testcase.

Tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN.

Uros.

Index: gcc.target/i386/pr70263-2.c
===================================================================
--- gcc.target/i386/pr70263-2.c (revision 254289)
+++ gcc.target/i386/pr70263-2.c (working copy)
@@ -4,20 +4,13 @@
 /* { dg-final { scan-rtl-dump "Adding REG_EQUIV to insn \[0-9\]+ for source of 
insn \[0-9\]+" "ira" } } */
 
 typedef float XFtype __attribute__ ((mode (XF)));
-typedef _Complex float XCtype __attribute__ ((mode (XC)));
-XCtype
-__mulxc3 (XFtype a, XFtype b, XFtype c, XFtype d)
+
+void bar (XFtype);
+
+void
+foo (XFtype a, XFtype c)
 {
-  XFtype ac, bd, ad, bc, x, y;
-  ac = a * c;
-__asm__ ("": "=m" (ac):"m" (ac));
-  if (x != x)
-    {
-      _Bool recalc = 0;
-      if (((!(!(((ac) - (ac)) != ((ac) - (ac)))))))
-       recalc = 1;
-      if (recalc)
-       x = __builtin_huge_vall () * (a * c - b * d);
-    }
-  return x;
+  XFtype ac = a * c;
+
+  bar (ac);
 }