aarch64: Tweak error message for (tuple,vector) pairs

SME2 adds more intrinsics that take a tuple of vectors followed
by a single vector, with the two arguments expected to have the
same element type.  Unlike with the existing svset* intrinsics,
the size of the tuple is not fixed by the overloaded function name.

This patch adds an error message that (hopefully) copes better
with that combination.

gcc/
	* config/aarch64/aarch64-sve-builtins.cc
	(function_resolver::require_derived_vector_type): Add a specific
	error message for the case in which the caller wants a single
	vector whose element type matches a previous tuyple argument.

gcc/testsuite/
	* gcc.target/aarch64/sve/acle/general-c/set_1.c: Tweak expected
	error message.
	* gcc.target/aarch64/sve/acle/general-c/set_3.c: Likewise.
	* gcc.target/aarch64/sve/acle/general-c/set_5.c: Likewise.

4 files changed, 19 insertions, 6 deletions

diff --git a/gcc/config/aarch64/aarch64-sve-builtins.cc b/gcc/config/aarch64/aarch64-sve-builtins.cc
index cdae772..55bd266 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins.cc
@@ -1707,6 +1707,19 @@ require_derived_vector_type (unsigned int argno,
   if (!actual_type)
     return false;
 
+  if (orig_expected_tclass == SAME_TYPE_CLASS
+      && orig_expected_bits == SAME_SIZE)
+    {
+      if (actual_type.type == first_type.type)
+	return true;
+
+      error_at (location, "passing %qT to argument %d of %qE, but"
+		" argument %d was a tuple of %qT",
+		get_vector_type (actual_type), argno + 1, fndecl,
+		first_argno + 1, get_vector_type (first_type.type));
+      return false;
+    }
+
   /* Exit now if we got the right type.  */
   auto &actual_type_suffix = type_suffixes[actual_type.type];
   bool tclass_ok_p = (actual_type_suffix.tclass == expected_tclass);
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_1.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_1.c
index f07c761..f2a6da5 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_1.c
@@ -16,8 +16,8 @@ f1 (svbool_t pg, svuint8_t u8, svuint8x2_t u8x2, svuint8x3_t u8x3, int x)
   u8x2 = svset2 (u8x3, 0, u8); /* { dg-error {passing 'svuint8x3_t' to argument 1 of 'svset2', which expects a tuple of 2 vectors} } */
   u8x2 = svset2 (pg, 0, u8); /* { dg-error {passing 'svbool_t' to argument 1 of 'svset2', which expects a tuple of 2 vectors} } */
   u8x2 = svset2 (u8x2, 0, u8x2); /* { dg-error {passing 'svuint8x2_t' to argument 3 of 'svset2', which expects a single SVE vector rather than a tuple} } */
-  u8x2 = svset2 (u8x2, 0, f64); /* { dg-error {passing 'svfloat64_t' instead of the expected 'svuint8_t' to argument 3 of 'svset2', after passing 'svuint8x2_t' to argument 1} } */
-  u8x2 = svset2 (u8x2, 0, pg); /* { dg-error {passing 'svbool_t' instead of the expected 'svuint8_t' to argument 3 of 'svset2', after passing 'svuint8x2_t' to argument 1} } */
+  u8x2 = svset2 (u8x2, 0, f64); /* { dg-error {passing 'svfloat64_t' to argument 3 of 'svset2', but argument 1 was a tuple of 'svuint8_t'} } */
+  u8x2 = svset2 (u8x2, 0, pg); /* { dg-error {passing 'svbool_t' to argument 3 of 'svset2', but argument 1 was a tuple of 'svuint8_t'} } */
   u8x2 = svset2 (u8x2, x, u8); /* { dg-error {argument 2 of 'svset2' must be an integer constant expression} } */
   u8x2 = svset2 (u8x2, 0, u8);
   f64 = svset2 (u8x2, 0, u8); /* { dg-error {incompatible types when assigning to type 'svfloat64_t' from type 'svuint8x2_t'} } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_3.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_3.c
index 543a1be..92b955f 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_3.c
@@ -17,8 +17,8 @@ f1 (svbool_t pg, svfloat16_t f16, svfloat16x3_t f16x3, svfloat16x4_t f16x4,
   f16x3 = svset3 (f16x4, 0, f16); /* { dg-error {passing 'svfloat16x4_t' to argument 1 of 'svset3', which expects a tuple of 3 vectors} } */
   f16x3 = svset3 (pg, 0, f16); /* { dg-error {passing 'svbool_t' to argument 1 of 'svset3', which expects a tuple of 3 vectors} } */
   f16x3 = svset3 (f16x3, 0, f16x3); /* { dg-error {passing 'svfloat16x3_t' to argument 3 of 'svset3', which expects a single SVE vector rather than a tuple} } */
-  f16x3 = svset3 (f16x3, 0, f64); /* { dg-error {passing 'svfloat64_t' instead of the expected 'svfloat16_t' to argument 3 of 'svset3', after passing 'svfloat16x3_t' to argument 1} } */
-  f16x3 = svset3 (f16x3, 0, pg); /* { dg-error {passing 'svbool_t' instead of the expected 'svfloat16_t' to argument 3 of 'svset3', after passing 'svfloat16x3_t' to argument 1} } */
+  f16x3 = svset3 (f16x3, 0, f64); /* { dg-error {passing 'svfloat64_t' to argument 3 of 'svset3', but argument 1 was a tuple of 'svfloat16_t'} } */
+  f16x3 = svset3 (f16x3, 0, pg); /* { dg-error {passing 'svbool_t' to argument 3 of 'svset3', but argument 1 was a tuple of 'svfloat16_t'} } */
   f16x3 = svset3 (f16x3, x, f16); /* { dg-error {argument 2 of 'svset3' must be an integer constant expression} } */
   f16x3 = svset3 (f16x3, 0, f16);
   f64 = svset3 (f16x3, 0, f16); /* { dg-error {incompatible types when assigning to type 'svfloat64_t' from type 'svfloat16x3_t'} } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_5.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_5.c
index be911a7..f0696fb 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_5.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/set_5.c
@@ -16,8 +16,8 @@ f1 (svbool_t pg, svint32_t s32, svint32x4_t s32x4, svint32x2_t s32x2, int x)
   s32x4 = svset4 (s32x2, 0, s32); /* { dg-error {passing 'svint32x2_t' to argument 1 of 'svset4', which expects a tuple of 4 vectors} } */
   s32x4 = svset4 (pg, 0, s32); /* { dg-error {passing 'svbool_t' to argument 1 of 'svset4', which expects a tuple of 4 vectors} } */
   s32x4 = svset4 (s32x4, 0, s32x4); /* { dg-error {passing 'svint32x4_t' to argument 3 of 'svset4', which expects a single SVE vector rather than a tuple} } */
-  s32x4 = svset4 (s32x4, 0, f64); /* { dg-error {passing 'svfloat64_t' instead of the expected 'svint32_t' to argument 3 of 'svset4', after passing 'svint32x4_t' to argument 1} } */
-  s32x4 = svset4 (s32x4, 0, pg); /* { dg-error {passing 'svbool_t' instead of the expected 'svint32_t' to argument 3 of 'svset4', after passing 'svint32x4_t' to argument 1} } */
+  s32x4 = svset4 (s32x4, 0, f64); /* { dg-error {passing 'svfloat64_t' to argument 3 of 'svset4', but argument 1 was a tuple of 'svint32_t'} } */
+  s32x4 = svset4 (s32x4, 0, pg); /* { dg-error {passing 'svbool_t' to argument 3 of 'svset4', but argument 1 was a tuple of 'svint32_t'} } */
   s32x4 = svset4 (s32x4, x, s32); /* { dg-error {argument 2 of 'svset4' must be an integer constant expression} } */
   s32x4 = svset4 (s32x4, 0, s32);
   f64 = svset4 (s32x4, 0, s32); /* { dg-error {incompatible types when assigning to type 'svfloat64_t' from type 'svint32x4_t'} } */