[BPF] support indirect branch (callx) in AsmParser

Simply mark `callx` as a valid ID, so it can be recognized. Previously this valid asm triggers an error: # clang local/callx.s -target bpf local/callx.s:8:2: error: invalid register/token name callx r1 ^
llvm · Dec 10, 2023 · feb2060 · feb2060
1 parent 95e5008
commit feb2060
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diff --git a/llvm/lib/Target/BPF/AsmParser/BPFAsmParser.cpp b/llvm/lib/Target/BPF/AsmParser/BPFAsmParser.cpp
@@ -229,6 +229,7 @@ struct BPFOperand : public MCParsedAsmOperand {
     return StringSwitch<bool>(Name.lower())
         .Case("if", true)
         .Case("call", true)
+        .Case("callx", true)
         .Case("goto", true)
         .Case("gotol", true)
         .Case("*", true)

diff --git a/llvm/test/MC/BPF/callx.s b/llvm/test/MC/BPF/callx.s
@@ -0,0 +1,4 @@
+# RUN: llvm-mc -triple bpfel -show-encoding < %s | FileCheck %s
+
+# CHECK: callx r1                                # encoding: [0x8d,0x00,0x00,0x00,0x01,0x00,0x00,0x00]
+callx r1