[X86][AsmParser][AVX512] Error appropriately when K0 is tried as a write-mask
K0 isn't expected as a write-mask, so provide a detailed error here, instead of the more generic one (invalid op for insn)
Conforms with gas
Differential Revision: https://reviews.llvm.org/D36570
llvm-svn: 310789
diff --git a/llvm/test/MC/X86/intel-syntax-avx512-error.s b/llvm/test/MC/X86/intel-syntax-avx512-error.s
index c0ca8a6..6e9925f 100644
--- a/llvm/test/MC/X86/intel-syntax-avx512-error.s
+++ b/llvm/test/MC/X86/intel-syntax-avx512-error.s
@@ -7,3 +7,6 @@
// CHECK: error: Expected a {z} mark at this point
vfmsub213ps zmm8{rn-sae}, zmm8, zmm8
// CHECK: error: Expected an op-mask register at this point
+ vpcmpltd k5{k0}, zmm7, zmm24
+// CHECK: error: Register k0 can't be used as write mask
+