[AsmParser][AVX512]Enhance OpMask/Zero/Merge syntax check rubostness
Adopt a more strict approach regarding what marks should/can appear after a destination register, when operating upon an AVX512 platform.
Differential Revision: https://reviews.llvm.org/D35785
llvm-svn: 310467
diff --git a/llvm/test/MC/X86/intel-syntax-avx512-error.s b/llvm/test/MC/X86/intel-syntax-avx512-error.s
new file mode 100644
index 0000000..c0ca8a6
--- /dev/null
+++ b/llvm/test/MC/X86/intel-syntax-avx512-error.s
@@ -0,0 +1,9 @@
+// RUN: not llvm-mc %s -triple x86_64-unknown-unknown -mcpu=knl -mattr=+avx512f -x86-asm-syntax=intel -output-asm-variant=1 -o /dev/null 2>&1 | FileCheck %s
+
+// Validate that only OpMask/Zero mark may immediately follow destination
+ vfmsub213ps zmm8{rn-sae} {k2}, zmm8, zmm8
+// CHECK: error: Expected an op-mask register at this point
+ vfmsub213ps zmm8{k2} {rn-sae}, zmm8, zmm8
+// 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