aarch64: Optimize SVE extract last for VLS.

For the test case
int32_t foo (svint32_t x)
{
  svbool_t pg = svpfalse ();
  return svlastb_s32 (pg, x);
}
compiled with -O3 -mcpu=grace -msve-vector-bits=128, GCC produced:
foo:
	pfalse	p3.b
	lastb	w0, p3, z0.s
	ret
when it could use a Neon lane extract instead:
foo:
	umov	w0, v0.s[3]
	ret

Similar optimizations can be made for VLS with other vector widths.

We implemented this optimization by guarding the emission of
pfalse+lastb in the pattern vec_extract<mode><Vel> by
!val.is_constant ().
Thus, for last-extract operations with VLS, the patterns
*vec_extract<mode><Vel>_v128, *vec_extract<mode><Vel>_dup, or
*vec_extract<mode><Vel>_ext are used instead.
We added tests for 128-bit VLS and adjusted the tests for the other vector
widths.

The patch was bootstrapped and tested on aarch64-linux-gnu, no regression.
OK for mainline?

Signed-off-by: Jennifer Schmitz <jschmitz@nvidia.com>

gcc/
	* config/aarch64/aarch64-sve.md (vec_extract<mode><Vel>):
	Prevent the emission of pfalse+lastb for VLS.

gcc/testsuite/
	* gcc.target/aarch64/sve/extract_last_128.c: New test.
	* gcc.target/aarch64/sve/extract_1.c: Adjust expected outcome.
	* gcc.target/aarch64/sve/extract_2.c: Likewise.
	* gcc.target/aarch64/sve/extract_3.c: Likewise.
	* gcc.target/aarch64/sve/extract_4.c: Likewise.

6 files changed, 77 insertions, 55 deletions

diff --git a/gcc/config/aarch64/aarch64-sve.md b/gcc/config/aarch64/aarch64-sve.md
index d4af370..7bf12ff 100644
--- a/gcc/config/aarch64/aarch64-sve.md
+++ b/gcc/config/aarch64/aarch64-sve.md
@@ -2969,10 +2969,11 @@
   {
     poly_int64 val;
     if (poly_int_rtx_p (operands[2], &val)
-	&& known_eq (val, GET_MODE_NUNITS (<MODE>mode) - 1))
+	&& known_eq (val, GET_MODE_NUNITS (<MODE>mode) - 1)
+	&& !val.is_constant ())
       {
-	/* The last element can be extracted with a LASTB and a false
-	   predicate.  */
+	/* For VLA, extract the last element with a LASTB and a false
+	   predicate. */
 	rtx sel = aarch64_pfalse_reg (<VPRED>mode);
 	emit_insn (gen_extract_last_<mode> (operands[0], sel, operands[1]));
 	DONE;
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/extract_1.c b/gcc/testsuite/gcc.target/aarch64/sve/extract_1.c
index 5d5edf2..b5ca3b3 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/extract_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/extract_1.c
@@ -56,40 +56,37 @@ typedef _Float16 vnx8hf __attribute__((vector_size (32)));
 
 TEST_ALL (EXTRACT)
 
-/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 2 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 3 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\td[0-9]+, v[0-9]+\.d\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\td[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[2\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tx[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\td[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[3\]\n} 2 } } */
 
-/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 2 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 3 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\ts[0-9]+, v[0-9]+\.s\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[4\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\ts[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[7\]\n} 2 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 3 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\th[0-9]+, v[0-9]+\.h\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[8\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\th[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[15\]\n} 2 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 3 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[15\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[16\]\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.b\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[31\]\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/extract_2.c b/gcc/testsuite/gcc.target/aarch64/sve/extract_2.c
index 0e6ec83..a3886b2 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/extract_2.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/extract_2.c
@@ -56,40 +56,37 @@ typedef _Float16 vnx16hf __attribute__((vector_size (64)));
 
 TEST_ALL (EXTRACT)
 
-/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 2 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 3 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\td[0-9]+, v[0-9]+\.d\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\td[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[2\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tx[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\td[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[7\]\n} 2 } } */
 
-/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 2 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 3 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\ts[0-9]+, v[0-9]+\.s\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[4\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\ts[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[15\]\n} 2 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 3 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\th[0-9]+, v[0-9]+\.h\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[8\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\th[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[31\]\n} 2 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 3 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[15\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[16\]\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.b\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[63\]\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/extract_3.c b/gcc/testsuite/gcc.target/aarch64/sve/extract_3.c
index 0d7a2fa..c22b8a9 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/extract_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/extract_3.c
@@ -77,18 +77,16 @@ typedef _Float16 vnx32hf __attribute__((vector_size (128)));
 
 TEST_ALL (EXTRACT)
 
-/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 5 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 6 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\td[0-9]+, v[0-9]+\.d\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\td[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[2\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[7\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tx[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\td[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
 
-/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 5 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 6 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\ts[0-9]+, v[0-9]+\.s\[0\]\n} } } */
@@ -96,11 +94,9 @@ TEST_ALL (EXTRACT)
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[4\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[15\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\ts[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 5 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 6 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\th[0-9]+, v[0-9]+\.h\[0\]\n} } } */
@@ -108,19 +104,20 @@ TEST_ALL (EXTRACT)
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[8\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[31\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\th[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 5 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 6 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[15\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[16\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[63\]\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.b\n} 1 } } */
 
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #64\n} 7 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #72\n} 2 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #84\n} 2 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #94\n} 2 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #100\n} 1 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #120\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #124\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #126\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #127\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/extract_4.c b/gcc/testsuite/gcc.target/aarch64/sve/extract_4.c
index a706291..0fa9175 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/extract_4.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/extract_4.c
@@ -84,18 +84,16 @@ typedef _Float16 v128hf __attribute__((vector_size (256)));
 
 TEST_ALL (EXTRACT)
 
-/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 6 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tx[0-9]+, d[0-9]+\n} 7 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\td[0-9]+, v[0-9]+\.d\[0\]\n} } } */
 /* { dg-final { scan-assembler-times {\tdup\td[0-9]+, v[0-9]+\.d\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[2\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.d, z[0-9]+\.d\[7\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tx[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\td[0-9]+, p[0-7], z[0-9]+\.d\n} 1 } } */
 
-/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 6 { target aarch64_little_endian } } } */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 1 { target aarch64_big_endian } } } */
+/* { dg-final { scan-assembler-times {\tfmov\tw[0-9]+, s[0-9]+\n} 7 { target aarch64_little_endian } } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[0\]\n} 2 { target aarch64_big_endian } } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\ts[0-9]+, v[0-9]+\.s\[0\]\n} } } */
@@ -103,11 +101,9 @@ TEST_ALL (EXTRACT)
 /* { dg-final { scan-assembler-times {\tdup\ts[0-9]+, v[0-9]+\.s\[3\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[4\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.s, z[0-9]+\.s\[15\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\ts[0-9]+, p[0-7], z[0-9]+\.s\n} 1 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 6 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[0\]\n} 7 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-not {\tdup\th[0-9]+, v[0-9]+\.h\[0\]\n} } } */
@@ -115,16 +111,13 @@ TEST_ALL (EXTRACT)
 /* { dg-final { scan-assembler-times {\tdup\th[0-9]+, v[0-9]+\.h\[7\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[8\]\n} 2 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.h, z[0-9]+\.h\[31\]\n} 2 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\th[0-9]+, p[0-7], z[0-9]+\.h\n} 1 } } */
 
 /* Also used to move the result of a non-Advanced SIMD extract.  */
-/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 6 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[0\]\n} 7 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[1\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b\[15\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[16\]\n} 1 } } */
 /* { dg-final { scan-assembler-times {\tdup\tz[0-9]+\.b, z[0-9]+\.b\[63\]\n} 1 } } */
-/* { dg-final { scan-assembler-times {\tlastb\tw[0-9]+, p[0-7], z[0-9]+\.b\n} 1 } } */
 
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #64\n} 7 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #72\n} 2 } } */
@@ -135,3 +128,7 @@ TEST_ALL (EXTRACT)
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #124\n} 2 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #126\n} 2 } } */
 /* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #127\n} 1 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #248\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #252\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #254\n} 2 } } */
+/* { dg-final { scan-assembler-times {\text\tz[0-9]+\.b, z[0-9]+\.b, z[0-9]+\.b, #255\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/extract_last_128.c b/gcc/testsuite/gcc.target/aarch64/sve/extract_last_128.c
new file mode 100644
index 0000000..2684fb6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/extract_last_128.c
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -msve-vector-bits=128" } */
+
+#include <arm_sve.h>
+
+#define TEST(TYPE, TY)			\
+  TYPE extract_last_##TY (sv##TYPE x)	\
+  {					\
+    svbool_t pg = svpfalse ();		\
+    return svlastb_##TY (pg, x);	\
+  }
+
+TEST(bfloat16_t, bf16)
+TEST(float16_t, f16)
+TEST(float32_t, f32)
+TEST(float64_t, f64)
+TEST(int8_t, s8)
+TEST(int16_t, s16)
+TEST(int32_t, s32)
+TEST(int64_t, s64)
+TEST(uint8_t, u8)
+TEST(uint16_t, u16)
+TEST(uint32_t, u32)
+TEST(uint64_t, u64)
+
+/* { dg-final { scan-assembler-times {\tdup\th0, v0\.h\[7\]} 2 } } */
+/* { dg-final { scan-assembler-times {\tdup\ts0, v0\.s\[3\]} 1 } } */
+/* { dg-final { scan-assembler-times {\tdup\td0, v0\.d\[1\]} 1 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw0, v0\.h\[7\]} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw0, v0\.b\[15\]} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw0, v0\.s\[3\]} 2 } } */
+/* { dg-final { scan-assembler-times {\tumov\tx0, v0\.d\[1\]} 2 } } */
+/* { dg-final { scan-assembler-not "lastb" } } */
\ No newline at end of file