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authorDan Gohman <gohman@apple.com>2010-08-24 14:35:45 +0000
committerDan Gohman <gohman@apple.com>2010-08-24 14:35:45 +0000
commit6826114d6e10725d122dca9352dc2d99a0f693e9 (patch)
tree1013b179e53108ba42d06c3df28b8daa434ab769 /lib/AsmParser
parent41d6ab4b884120123e4f03bf284166f3af73deaa (diff)
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Add a comment explaining why this code doesn't just call
ParseMetadataValue. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111914 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/AsmParser')
-rw-r--r--lib/AsmParser/LLParser.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 0eb1b70c3f..7766ad61da 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -1134,6 +1134,10 @@ bool LLParser::ParseInstructionMetadata(Instruction *Inst,
if (ParseToken(lltok::exclaim, "expected '!' here"))
return true;
+ // This code is similar to that of ParseMetadataValue, however it needs to
+ // have special-case code for a forward reference; see the comments on
+ // ForwardRefInstMetadata for details. Also, MDStrings are not supported
+ // at the top level here.
if (Lex.getKind() == lltok::lbrace) {
ValID ID;
if (ParseMetadataListValue(ID, PFS))