Assert with missing operand

[jbush001]

The following (which is missing an argument in the macro instantiation):

.macro test_vvm operation, result, mask, operand1
                lea s0, \operand1
                load_v v0, (s0)
                move v2, 0  
                li s1, \mask
                \operation v2, s1, v0
                lea s0, \result
                load_v v3, (s0)
                cmpne_i s1, v2, v3
                bz s1, 1f
                call fail_test
1:
.endmacro

test_vvm reciprocal, result23, vec_op3

result23: .float 0.0, 0.5, 0.0, 0.125, 0.0, 0.03125, 0.0, 0.0078125, 0.0, 0.001953125, 0.0, 0.00048828125, 0.0, 0.0001220703125, 0.0, 0.000030517578125

Will assert after printing an error:

<instantiation>:1:9: error: unknown token in expression
lea s0, 
        ^
bad.S:16:1: note: while in macro instantiation
test_vvm reciprocal, result23, vec_op3
^
Assertion failed: (isImm() && "This is not an immediate"), function getImm, file /Users/jeffbush/src/NyuziToolchain/include/llvm/MC/MCInst.h, line 77.
0  clang-6.0                0x000000010190537c llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 60
1  clang-6.0                0x00000001019058f9 PrintStackTraceSignalHandler(void*) + 25
2  clang-6.0                0x0000000101901709 llvm::sys::RunSignalHandlers() + 425
3  clang-6.0                0x0000000101905d72 SignalHandler(int) + 354
4  libsystem_platform.dylib 0x00007fffacf54b3a _sigtramp + 26
5  libsystem_platform.dylib 0x00007f9f03c12530 _sigtramp + 1456200208
6  libsystem_c.dylib        0x00007fffacdd9420 abort + 129
7  libsystem_c.dylib        0x00007fffacda0893 basename_r + 0
8  clang-6.0                0x00000001001ee948 llvm::MCOperand::getImm() const + 104
9  clang-6.0                0x00000001001eb52d (anonymous namespace)::NyuziAsmParser::ProcessInstruction(llvm::MCInst&, llvm::SMLoc const&, llvm::MCStreamer&) + 189
10 clang-6.0                0x00000001001e0bb6 (anonymous namespace)::NyuziAsmParser::MatchAndEmitInstruction(llvm::SMLoc, unsigned int&, llvm::SmallVectorImpl<std::__1::unique_ptr<llvm::MCParsedAsmOperand, std::__1::default_delete<llvm::MCParsedAsmOperand> > >&, llvm::MCStreamer&, unsigned long long&, bool) + 278
11 clang-6.0                0x0000000101365d71 (anonymous namespace)::AsmParser::parseStatement((anonymous namespace)::ParseStatementInfo&, llvm::MCAsmParserSemaCallback*) + 20817
12 clang-6.0                0x000000010135699c (anonymous namespace)::AsmParser::Run(bool, bool) + 1484
13 clang-6.0                0x00000001001b4d12 ExecuteAssembler((anonymous namespace)::AssemblerInvocation&, clang::DiagnosticsEngine&) + 23922
14 clang-6.0                0x00000001001aa5ac cc1as_main(llvm::ArrayRef<char const*>, char const*, void*) + 2524
15 clang-6.0                0x0000000100191ed6 ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) + 1094
16 clang-6.0                0x000000010018ef09 main + 4457
17 libdyld.dylib            0x00007fffacd45235 start + 1
18 libdyld.dylib            0x0000000000000014 start + 1395371488