[Xtensa] Fix Code Density test. (#121073)

Fix dissambler test for Code Density feature.

Author: andreisfr

llvm/test/MC/Disassembler/Xtensa/code_density.txt

@@ -1,62 +1,52 @@
-# RUN: llvm-mc -triple=xtensa -mattr=+density -disassemble %s | FileCheck --check-prefix=CHECK-DENSITY %s
+# RUN: llvm-mc -triple=xtensa -mattr=+density -disassemble %s | FileCheck -check-prefixes=CHECK-DENSITY %s
+# RUN: not llvm-mc -triple=xtensa -disassemble %s 2>&1 | FileCheck --implicit-check-not=warning: -check-prefixes=CHECK-CORE %s
 
 #------------------------------------------------------------------------------
 # Verify that binary code is correctly disassembled with
 # code density option enabled. Also verify that dissasembling without
 # density option generates warnings.
 #------------------------------------------------------------------------------
 
-0x4a 0x23
+[0x4a, 0x23]
 # CHECK-DENSITY: add.n  a2, a3, a4
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x3b 0x23
+[0x3b, 0x23]
 # CHECK-DENSITY: addi.n a2, a3, 3
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x9c 0x03
+[0x9c, 0x03]
 # CHECK-DENSITY: beqz.n a3, . +20
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0xcc 0xe3
+[0xcc, 0xe3]
 # CHECK-DENSITY: bnez.n a3, . +18
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x6d 0xf0
+[0x6d, 0xf0]
 # CHECK-DENSITY: ill.n
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x28 0x33
+[0x28, 0x33]
 # CHECK-DENSITY: l32i.n a2, a3, 12
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x2d 0x03
+[0x2d, 0x03]
 # CHECK-DENSITY: mov.n  a2, a3
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x0d 0xf0
+[0x0d, 0xf0]
 # CHECK-DENSITY: ret.n
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x29 0x33
+[0x29, 0x33]
 # CHECK-DENSITY: s32i.n a2, a3, 12
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x6c 0x02
+[0x6c, 0x02]
 # CHECK-DENSITY: movi.n a2, -32
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding
 
-0x3d 0xf0
+[0x3d, 0xf0]
 # CHECK-DENSITY: nop.n
-# CHECK-CORE: [[#@LINE-2]]:1: warning: invalid instruction encoding
-# CHECK-CORE: [[#@LINE-3]]:6: warning: invalid instruction encoding
+# CHECK-CORE: [[#@LINE-2]]:2: warning: invalid instruction encoding