[PATCH] rs6000: Fix condition of define_expand vec_shr_<mode> [PR100645]

["Kewen.Lin" <linkw@linux.ibm.com>]

Hi,
 
PR100645 exposes one latent bug in define_expand vec_shr_<mode>
that the current condition TARGET_ALTIVEC is too loose.  The
mode iterator VEC_L contains a few modes, they are not always
supported as vector mode, VECTOR_UNIT_ALTIVEC_OR_VSX_P should
be used like some other VEC_L usages.

Bootstrapped and regtested on powerpc64-linux-gnu P7 and
powerpc64le-linux-gnu P9 and P10.

I'm going to push it a week later if no objections.

BR,
Kewen
-----
	PR target/100645

gcc/ChangeLog:

	* config/rs6000/vector.md (vec_shr_<mode>): Replace condition
	TARGET_ALTIVEC with VECTOR_UNIT_ALTIVEC_OR_VSX_P.

gcc/testsuite/ChangeLog:

	* gcc.target/powerpc/pr100645.c: New test.
---
 gcc/config/rs6000/vector.md                 |  2 +-
 gcc/testsuite/gcc.target/powerpc/pr100645.c | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/powerpc/pr100645.c

diff --git a/gcc/config/rs6000/vector.md b/gcc/config/rs6000/vector.md
index a0d33d2f604..0171705803c 100644
--- a/gcc/config/rs6000/vector.md
+++ b/gcc/config/rs6000/vector.md
@@ -1475,7 +1475,7 @@ (define_expand "vec_shr_<mode>"
   [(match_operand:VEC_L 0 "vlogical_operand")
    (match_operand:VEC_L 1 "vlogical_operand")
    (match_operand:QI 2 "reg_or_short_operand")]
-  "TARGET_ALTIVEC"
+  "VECTOR_UNIT_ALTIVEC_OR_VSX_P (<MODE>mode)"
 {
   rtx bitshift = operands[2];
   rtx shift;
diff --git a/gcc/testsuite/gcc.target/powerpc/pr100645.c b/gcc/testsuite/gcc.target/powerpc/pr100645.c
new file mode 100644
index 00000000000..e221287c0f1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr100645.c
@@ -0,0 +1,13 @@
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-mdejagnu-cpu=power6 -maltivec" } */
+
+/* It's to verify no ICE here.  */
+
+typedef long long v2di __attribute__ ((vector_size (16)));
+
+v2di
+foo_v2di_l (v2di x)
+{
+  return __builtin_shuffle ((v2di){0, 0}, x, (v2di){3, 0});
+}
+
--
2.27.0