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Reword this comment to reference a more fundamental issue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93154 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1230,8 +1230,8 @@ bool X86FastISel::X86SelectCall(Instruction *I) {
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CC != CallingConv::X86_FastCall)
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CC != CallingConv::X86_FastCall)
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return false;
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return false;
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// On X86, -tailcallopt changes the fastcc ABI. FastISel doesn't
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// fastcc with -tailcallopt is intended to provide a guaranteed
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// handle this for now.
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// tail call optimization. Fastisel doesn't know how to do that.
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if (CC == CallingConv::Fast && PerformTailCallOpt)
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if (CC == CallingConv::Fast && PerformTailCallOpt)
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return false;
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return false;
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