RISC-V and LoongArch64 IR JITs: Name the fixed code routines, and profile on Linux

Both now list their routines (GetFixedCodeLabels), so the disassembly
names jump targets and --jit-profile charges routine samples to the
calling block. The profiler samples them on Linux, and its report
disassembles their host code per instruction (RISC-V's in 2- and 4-byte
steps).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Core/MIPS/IR/IRNativeCommon.cpp

@@ -656,6 +656,23 @@ static std::vector<std::string> DisassembleHost(const u8 *p, int size, std::vect
 	}
 #elif PPSSPP_ARCH(X86) || PPSSPP_ARCH(AMD64)
 	lines = DisassembleX86(p, size, &offsets);
+#elif PPSSPP_ARCH(RISCV64)
+	for (int i = 0; i + 2 <= size; ) {
+		// Compressed instructions are 2 bytes.
+		const int len = (p[i] & 3) == 3 ? 4 : 2;
+		if (i + len > size)
+			break;
+		std::vector<std::string> one = DisassembleRV64(p + i, len);
+		lines.push_back(one.empty() ? "?" : one[0]);
+		offsets.push_back(i);
+		i += len;
+	}
+#elif PPSSPP_ARCH(LOONGARCH64)
+	for (int i = 0; i + 4 <= size; i += 4) {
+		std::vector<std::string> one = DisassembleLA64(p + i, 4);
+		lines.push_back(one.empty() ? "?" : one[0]);
+		offsets.push_back(i);
+	}
 #else
 	lines.push_back("(no per-instruction disassembly for this host)");
 	offsets.push_back(0);