[mips] Check that features required by built-ins are enabled

Now Clang does not check that features required by built-in functions
are enabled. That causes errors in the backend reported in PR44018.

This patch fixes this bug by checking that required features
are enabled.

This should fix PR44018.

Differential Revision: https://reviews.llvm.org/D70808

1 files changed, 37 insertions, 0 deletions

diff --git a/clang/test/Sema/builtins-mips-features.c b/clang/test/Sema/builtins-mips-features.c
new file mode 100644
index 00000000000..4ea36d7f24d
--- /dev/null
+++ b/clang/test/Sema/builtins-mips-features.c
@@ -0,0 +1,37 @@
+// REQUIRES: mips-registered-target
+// RUN: %clang_cc1 -triple mips64 -fsyntax-only -verify %s
+
+typedef signed char v4i8 __attribute__ ((vector_size(4)));
+typedef signed char v4q7 __attribute__ ((vector_size(4)));
+typedef signed char v16i8 __attribute__((vector_size(16), aligned(16)));
+typedef unsigned char v16u8 __attribute__((vector_size(16), aligned(16)));
+
+void dsp() {
+  v4i8 a;
+  void* p;
+
+  // expected-error@+1 {{this builtin requires 'dsp' ASE, please use -mdsp}}
+  __builtin_mips_addu_qb(a, a);
+  // expected-error@+1 {{this builtin requires 'dsp' ASE, please use -mdsp}}
+  __builtin_mips_lwx(p, 32);
+}
+
+void dspr2() {
+  v4i8 a;
+  v4q7 b;
+
+  // expected-error@+1 {{this builtin requires 'dsp r2' ASE, please use -mdspr2}}
+  __builtin_mips_absq_s_qb(b);
+  // expected-error@+1 {{this builtin requires 'dsp r2' ASE, please use -mdspr2}}
+  __builtin_mips_subuh_r_qb(a, a);
+}
+
+void msa() {
+  v16i8 a;
+  v16u8 b;
+
+  // expected-error@+1 {{this builtin requires 'msa' ASE, please use -mmsa}}
+  __builtin_msa_add_a_b(a, a);
+  // expected-error@+1 {{this builtin requires 'msa' ASE, please use -mmsa}}
+  __builtin_msa_xori_b(b, 5);
+}