mips.c (DIRECT_BUILTIN_PURE): New macro.

        * config/mips/mips.c (DIRECT_BUILTIN_PURE): New macro. Add a
        pure qualifier to the built-in.
        (MSA_BUILTIN_PURE): New macro. Add a pure qualifier to the MSA
        built-ins.
        (struct mips_builtin_description): Add is_pure flag.
        (mips_init_builtins): Mark built-in as pure if the flag in the
        corresponding mips_builtin_description struct is set.

        * gcc.target/mips/mips-builtins-pure.c: New test.

From-SVN: r277534

gcc/ChangeLog

 2019-10-28  Mihailo Stojanovic  <mistojanovic@wavecomp.com>
 
+	* config/mips/mips.c (DIRECT_BUILTIN_PURE): New macro. Add a
+	pure qualifier to the built-in.
+	(MSA_BUILTIN_PURE): New macro. Add a pure qualifier to the MSA
+	built-ins.
+	(struct mips_builtin_description): Add is_pure flag.
+	(mips_init_builtins): Mark built-in as pure if the flag in the
+	corresponding mips_builtin_description struct is set.
+
 	* config/mips/mips-msa.md (msa_insert_<msaftm_f>): Add an
 	alternative which covers the floating-point input value. Also
 	forbid the split of insert.d pattern for floating-point values.

gcc/testsuite/ChangeLog

 2019-10-28  Mihailo Stojanovic  <mistojanovic@wavecomp.com>
 
+	* gcc.target/mips/mips-builtins-pure.c: New test.
+
 	* gcc.target/mips/msa-insert-split.c: New test.
 
 2019-10-28  Andrew Burgess  <andrew.burgess@embecosm.com>

gcc/testsuite/gcc.target/mips/mips-builtins-pure.c

+/* { dg-do compile } */
+/* { dg-options "-mfp64 -mhard-float -mmsa" } */
+/* { dg-skip-if "code quality test" { *-*-* } { "-O0" } { "" } } */
+
+typedef double v2f64 __attribute__ ((vector_size (16)));
+typedef long long v2i64 __attribute__ ((vector_size (16)));
+typedef int v4i32 __attribute__ ((vector_size (16)));
+
+long long foo(const v2f64* a)
+{
+  v2f64 x;
+  v2i64 y;
+
+  x = (v2f64)__builtin_msa_shf_w((v4i32)*a, 0xff);
+  y = __builtin_msa_fcun_d(*a, x);
+
+  return y[0];
+}
+
+/* { dg-final { scan-assembler-times "ld" 1 } } */