[llvm] [BPF] Make llvm-objdump disasm default cpu v4 (PR #102166)

[via llvm-commits]

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@@ -34,9 +34,9 @@
   r6 = *(u16 *)(r1 + 8)  // BPF_LDX | BPF_H
   r7 = *(u32 *)(r2 + 16) // BPF_LDX | BPF_W
   r8 = *(u64 *)(r3 - 30) // BPF_LDX | BPF_DW
-// CHECK-64: 71 05 00 00 00 00 00 00 	r5 = *(u8 *)(r0 + 0)
-// CHECK-64: 69 16 08 00 00 00 00 00 	r6 = *(u16 *)(r1 + 8)
-// CHECK-64: 61 27 10 00 00 00 00 00 	r7 = *(u32 *)(r2 + 16)
+// CHECK-64: 71 05 00 00 00 00 00 00 	w5 = *(u8 *)(r0 + 0)
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eddyz87 wrote:

Orthogonal to this change, but I find this disassembly difference between CPU versions quite annoying. It seems that it is better to avoid multiple textual representations for the same instruction encoding.

https://github.com/llvm/llvm-project/pull/102166