wire up support for emitting "special" values from inline asm
format strings with the standard ${:foo} syntax.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66527 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 0e04a16..2a3a8bb 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1185,7 +1185,7 @@
/// or other bits of target-specific knowledge into the asmstrings. The
/// syntax used is ${:comment}. Targets can override this to add support
/// for their own strange codes.
-void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
+void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
if (!strcmp(Code, "private")) {
O << TAI->getPrivateGlobalPrefix();
} else if (!strcmp(Code, "comment")) {
@@ -1307,6 +1307,25 @@
HasCurlyBraces = true;
}
+ // If we have ${:foo}, then this is not a real operand reference, it is a
+ // "magic" string reference, just like in .td files. Arrange to call
+ // PrintSpecial.
+ if (HasCurlyBraces && *LastEmitted == ':') {
+ ++LastEmitted;
+ const char *StrStart = LastEmitted;
+ const char *StrEnd = strchr(StrStart, '}');
+ if (StrEnd == 0) {
+ cerr << "Unterminated ${:foo} operand in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+
+ std::string Val(StrStart, StrEnd);
+ PrintSpecial(MI, Val.c_str());
+ LastEmitted = StrEnd+1;
+ break;
+ }
+
const char *IDStart = LastEmitted;
char *IDEnd;
errno = 0;