[PATCH] D20234: Do not assume InstAlias operands appear after a blank

[Roger Ferrer Ibanez via llvm-commits]

rogfer01 created this revision.
rogfer01 added a reviewer: stoklund.
rogfer01 added a subscriber: llvm-commits.
Herald added a subscriber: aemerson.

AsmWriterEmitter.cpp assumes that all operands of a printed alias
will appear after a blank. This assumption does not hold in the ARM
target.

http://reviews.llvm.org/D20234

Files:
  utils/TableGen/AsmWriterEmitter.cpp

Index: utils/TableGen/AsmWriterEmitter.cpp
===================================================================
--- utils/TableGen/AsmWriterEmitter.cpp
+++ utils/TableGen/AsmWriterEmitter.cpp
@@ -1005,13 +1005,14 @@
   // Code that prints the alias, replacing the operands with the ones from the
   // MCInst.
   O << "  unsigned I = 0;\n";
-  O << "  while (AsmString[I] != ' ' && AsmString[I] != '\t' &&\n";
-  O << "         AsmString[I] != '\\0')\n";
+  O << "  while (AsmString[I] != ' ' && AsmString[I] != '\\t' &&\n";
+  O << "         AsmString[I] != '$' && AsmString[I] != '\\0')\n";
   O << "    ++I;\n";
   O << "  OS << '\\t' << StringRef(AsmString, I);\n";
 
   O << "  if (AsmString[I] != '\\0') {\n";
-  O << "    OS << '\\t';\n";
+  O << "    if (AsmString[I] == ' ' || AsmString[I] == '\\t')";
+  O << "      OS << '\\t';\n";
   O << "    do {\n";
   O << "      if (AsmString[I] == '$') {\n";
   O << "        ++I;\n";


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