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Parse the %*# constraint modifiers
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26341 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -51,6 +51,7 @@ bool InlineAsm::ConstraintInfo::Parse(const std::string &Str,
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isEarlyClobber = false;
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isIndirectOutput = false;
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hasMatchingInput = false;
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isCommutative = false;
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// Parse the prefix.
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if (*I == '~') {
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@ -74,12 +75,21 @@ bool InlineAsm::ConstraintInfo::Parse(const std::string &Str,
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default:
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DoneWithModifiers = true;
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break;
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case '&':
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case '&': // Early clobber.
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if (Type != isOutput || // Cannot early clobber anything but output.
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isEarlyClobber) // Reject &&&&&&
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return true;
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isEarlyClobber = true;
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break;
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case '%': // Commutative.
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if (Type == isClobber || // Cannot commute clobbers.
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isCommutative) // Reject %%%%%
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return true;
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isCommutative = true;
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break;
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case '#': // Comment.
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case '*': // Register preferencing.
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return true; // Not supported.
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}
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if (!DoneWithModifiers) {
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