rs6000: Fix LE code gen for vec_cnt[lt]z_lsbb [PR95082]

These built-ins were misimplemented as always having big-endian semantics.

2022-01-18  Bill Schmidt  <wschmidt@linux.ibm.com>

gcc/
	PR target/95082
	* config/rs6000/rs6000-builtin.cc (rs6000_expand_builtin): Handle
	endianness for vclzlsbb and vctzlsbb.
	* config/rs6000/rs6000-builtins.def (VCLZLSBB_V16QI): Change
	default pattern and indicate a different pattern will be used for
	big endian.
	(VCLZLSBB_V4SI): Likewise.
	(VCLZLSBB_V8HI): Likewise.
	(VCTZLSBB_V16QI): Likewise.
	(VCTZLSBB_V4SI): Likewise.
	(VCTZLSBB_V8HI): Likewise.

gcc/testsuite/
	PR target/95082
	* gcc.target/powerpc/vsu/vec-cntlz-lsbb-0.c: Restrict to -mbig.
	* gcc.target/powerpc/vsu/vec-cntlz-lsbb-1.c: Likewise.
	* gcc.target/powerpc/vsu/vec-cntlz-lsbb-3.c: New.
	* gcc.target/powerpc/vsu/vec-cntlz-lsbb-4.c: New.
	* gcc.target/powerpc/vsu/vec-cnttz-lsbb-0.c: Restrict to -mbig.
	* gcc.target/powerpc/vsu/vec-cnttz-lsbb-1.c: Likewise.
	* gcc.target/powerpc/vsu/vec-cnttz-lsbb-3.c: New.
	* gcc.target/powerpc/vsu/vec-cnttz-lsbb-4.c: New.

10 files changed, 82 insertions, 10 deletions

diff --git a/gcc/config/rs6000/rs6000-builtin.cc b/gcc/config/rs6000/rs6000-builtin.cc
index 005f936..69f8cee 100644
--- a/gcc/config/rs6000/rs6000-builtin.cc
+++ b/gcc/config/rs6000/rs6000-builtin.cc
@@ -3485,6 +3485,18 @@ rs6000_expand_builtin (tree exp, rtx target, rtx /* subtarget */,
 	icode = CODE_FOR_vsx_store_v8hi;
       else if (fcode == RS6000_BIF_ST_ELEMREV_V16QI)
 	icode = CODE_FOR_vsx_store_v16qi;
+      else if (fcode == RS6000_BIF_VCLZLSBB_V16QI)
+	icode = CODE_FOR_vclzlsbb_v16qi;
+      else if (fcode == RS6000_BIF_VCLZLSBB_V4SI)
+	icode = CODE_FOR_vclzlsbb_v4si;
+      else if (fcode == RS6000_BIF_VCLZLSBB_V8HI)
+	icode = CODE_FOR_vclzlsbb_v8hi;
+      else if (fcode == RS6000_BIF_VCTZLSBB_V16QI)
+	icode = CODE_FOR_vctzlsbb_v16qi;
+      else if (fcode == RS6000_BIF_VCTZLSBB_V4SI)
+	icode = CODE_FOR_vctzlsbb_v4si;
+      else if (fcode == RS6000_BIF_VCTZLSBB_V8HI)
+	icode = CODE_FOR_vctzlsbb_v8hi;
       else
 	gcc_unreachable ();
     }
diff --git a/gcc/config/rs6000/rs6000-builtins.def b/gcc/config/rs6000/rs6000-builtins.def
index a8ebb4a..7f527b6 100644
--- a/gcc/config/rs6000/rs6000-builtins.def
+++ b/gcc/config/rs6000/rs6000-builtins.def
@@ -2550,13 +2550,13 @@
     VBPERMD altivec_vbpermd {}
 
   const signed int __builtin_altivec_vclzlsbb_v16qi (vsc);
-    VCLZLSBB_V16QI vclzlsbb_v16qi {}
+    VCLZLSBB_V16QI vctzlsbb_v16qi {endian}
 
   const signed int __builtin_altivec_vclzlsbb_v4si (vsi);
-    VCLZLSBB_V4SI vclzlsbb_v4si {}
+    VCLZLSBB_V4SI vctzlsbb_v4si {endian}
 
   const signed int __builtin_altivec_vclzlsbb_v8hi (vss);
-    VCLZLSBB_V8HI vclzlsbb_v8hi {}
+    VCLZLSBB_V8HI vctzlsbb_v8hi {endian}
 
   const vsc __builtin_altivec_vctzb (vsc);
     VCTZB ctzv16qi2 {}
@@ -2571,13 +2571,13 @@
     VCTZW ctzv4si2 {}
 
   const signed int __builtin_altivec_vctzlsbb_v16qi (vsc);
-    VCTZLSBB_V16QI vctzlsbb_v16qi {}
+    VCTZLSBB_V16QI vclzlsbb_v16qi {endian}
 
   const signed int __builtin_altivec_vctzlsbb_v4si (vsi);
-    VCTZLSBB_V4SI vctzlsbb_v4si {}
+    VCTZLSBB_V4SI vclzlsbb_v4si {endian}
 
   const signed int __builtin_altivec_vctzlsbb_v8hi (vss);
-    VCTZLSBB_V8HI vctzlsbb_v8hi {}
+    VCTZLSBB_V8HI vclzlsbb_v8hi {endian}
 
   const signed int __builtin_altivec_vcmpaeb_p (vsc, vsc);
     VCMPAEB_P vector_ae_v16qi_p {}
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-0.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-0.c
index 0faf233..dc92d6f 100644
--- a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-0.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-0.c
@@ -1,6 +1,6 @@
 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-require-effective-target powerpc_p9vector_ok } */
-/* { dg-options "-mdejagnu-cpu=power9" } */
+/* { dg-options "-mdejagnu-cpu=power9 -mbig" } */
 
 #include <altivec.h>
 
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-1.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-1.c
index 201ed17..6fefb89 100644
--- a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-1.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-require-effective-target powerpc_p9vector_ok } */
-/* { dg-options "-mdejagnu-cpu=power9" } */
+/* { dg-options "-mdejagnu-cpu=power9 -mbig" } */
 
 #include <altivec.h>
 
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-3.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-3.c
new file mode 100644
index 0000000..6ee31a1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-3.c
@@ -0,0 +1,15 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
+/* { dg-options "-mdejagnu-cpu=power9 -mlittle" } */
+
+#include <altivec.h>
+
+int
+count_leading_zero_byte_bits (vector signed char *arg1_p)
+{
+  vector signed char arg_1 = *arg1_p;
+
+  return vec_cntlz_lsbb (arg_1);
+}
+
+/* { dg-final { scan-assembler "vctzlsbb" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-4.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-4.c
new file mode 100644
index 0000000..6105091
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cntlz-lsbb-4.c
@@ -0,0 +1,15 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
+/* { dg-options "-mdejagnu-cpu=power9 -mlittle" } */
+
+#include <altivec.h>
+
+int
+count_leading_zero_byte_bits (vector unsigned char *arg1_p)
+{
+  vector unsigned char arg_1 = *arg1_p;
+
+  return vec_cntlz_lsbb (arg_1);
+}
+
+/* { dg-final { scan-assembler "vctzlsbb" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-0.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-0.c
index 70a398a..68d6c5f 100644
--- a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-0.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-0.c
@@ -1,6 +1,6 @@
 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-require-effective-target powerpc_p9vector_ok } */
-/* { dg-options "-mdejagnu-cpu=power9" } */
+/* { dg-options "-mdejagnu-cpu=power9 -mbig" } */
 
 #include <altivec.h>
 
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-1.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-1.c
index f6d41e3..f971ea0 100644
--- a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-1.c
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-require-effective-target powerpc_p9vector_ok } */
-/* { dg-options "-mdejagnu-cpu=power9" } */
+/* { dg-options "-mdejagnu-cpu=power9 -mbig" } */
 
 #include <altivec.h>
 
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-3.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-3.c
new file mode 100644
index 0000000..a9245d8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-3.c
@@ -0,0 +1,15 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
+/* { dg-options "-mdejagnu-cpu=power9 -mlittle" } */
+
+#include <altivec.h>
+
+int
+count_trailing_zero_byte_bits (vector signed char *arg1_p)
+{
+  vector signed char arg_1 = *arg1_p;
+
+  return vec_cnttz_lsbb (arg_1);
+}
+
+/* { dg-final { scan-assembler "vclzlsbb" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-4.c b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-4.c
new file mode 100644
index 0000000..71fea53
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/vsu/vec-cnttz-lsbb-4.c
@@ -0,0 +1,15 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
+/* { dg-options "-mdejagnu-cpu=power9 -mlittle" } */
+
+#include <altivec.h>
+
+int
+count_trailing_zero_byte_bits (vector unsigned char *arg1_p)
+{
+  vector unsigned char arg_1 = *arg1_p;
+
+  return vec_cnttz_lsbb (arg_1);
+}
+
+/* { dg-final { scan-assembler "vclzlsbb" } } */