re PR target/28946 (assembler shifts set the flag ZF, no need to re-test to zero)

        PR target/28946
        * config/i386/i386.md ("*ashldi3_cconly_rex64", "*ashlsi3_cconly",
        "*ashlhi3_cconly", "*ashlqi3_cconly", "*ashrdi3_one_bit_cconly_rex64",
        "*ashrdi3_cconly_rex64", "*ashrsi3_one_bit_cconly", "*ashrsi3_cconly",
        "*ashrhi3_one_bit_cconly", "*ashrhi3_cconly",
        "*ashrqi3_one_bit_cconly", "*ashrqi3_cconly",
        "*lshrdi3_cconly_one_bit_rex64", "*lshrdi3_cconly_rex64",
        "*lshrsi3_one_bit_cconly", "*lshrsi3_cconly",
        "*lshrhi3_one_bit_cconly", "*lshrhi3_cconly",
        "*lshrqi2_one_bit_cconly", "*lshrqi2_cconly": New patterns to
        implement only CC setting effects of shift instructions.

testsuite/ChangeLog:

       PR target/28946
       * gcc.target/i386/pr28946.c: New test.

From-SVN: r116756

gcc/ChangeLog

+2006-09-07 Uros Bizjak <uros@kss-loka.si>
+
+	PR target/28946
+	* config/i386/i386.md ("*ashldi3_cconly_rex64", "*ashlsi3_cconly",
+	"*ashlhi3_cconly", "*ashlqi3_cconly", "*ashrdi3_one_bit_cconly_rex64",
+	"*ashrdi3_cconly_rex64", "*ashrsi3_one_bit_cconly", "*ashrsi3_cconly",
+	"*ashrhi3_one_bit_cconly", "*ashrhi3_cconly",
+	"*ashrqi3_one_bit_cconly", "*ashrqi3_cconly",
+	"*lshrdi3_cconly_one_bit_rex64", "*lshrdi3_cconly_rex64",
+	"*lshrsi3_one_bit_cconly", "*lshrsi3_cconly",
+	"*lshrhi3_one_bit_cconly", "*lshrhi3_cconly",
+	"*lshrqi2_one_bit_cconly", "*lshrqi2_cconly": New patterns to
+	implement only CC setting effects of shift instructions.
+
 2006-09-07  Martin Michlmayr  <tbm@cyrius.com>
 
 	* doc/contrib.texi: Add myself.

gcc/testsuite/ChangeLog

+2006-09-07  Uros Bizjak  <uros@kss-loka.si>
+
+	PR target/28946
+	* gcc.target/i386/pr28946.c: New test.
+
 2006-09-07  Steven G. Kargl  <kargls@comcast.net>
 
 	* gfortran.fortran-torture/compile/data_1.f90: Fix integer oveflow

gcc/testsuite/gcc.target/i386/pr28946.c

+/* { dg-do compile } */
+/* { dg-options "-O" } */
+/* { dg-final { scan-assembler-not "test" } } */
+
+int fct1 (void);
+int fct2 (void);
+
+int
+fct (unsigned nb)
+{
+  if ((nb >> 5) != 0)
+    return fct1 ();
+  else
+    return fct2 ();
+}