MC/X86: Add an XFAIL test where we aren't matching the correct instruction

because we don't understand how the specific instruction is doing sign
extension.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98404 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/MC/AsmParser/X86/x86_32-mismatched-add.s b/test/MC/AsmParser/X86/x86_32-mismatched-add.s
new file mode 100644 (file)
index 0000000..0840c65
--- /dev/null
+++ b/test/MC/AsmParser/X86/x86_32-mismatched-add.s
@@ -0,0 +1,8 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+// XFAIL: *
+
+// CHECK: addl $4294967295, %eax       # encoding: [0x83,0xc0,0xff]
+        addl $0xFFFFFFFF, %eax
+
+// CHECK: addl $65535, %eax       # encoding: [0x66,0x83,0xc0,0xff]
+        addw $0xFFFF, %ax