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[FunctionAttrs] Add comment and clarify assertion message; NFC

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llvm-svn: 252389
This commit is contained in:
Sanjoy Das 2015-11-07 01:56:07 +00:00
parent a80c5fc02d
commit c550b2c217
1 changed files with 6 additions and 1 deletions
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7
lib/Transforms/IPO/FunctionAttrs.cpp
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@ -457,7 +457,12 @@ determinePointerReadAttrs(Argument *A,
unsigned UseIndex = std::distance(CS.arg_begin(), U);
assert(UseIndex < CS.data_operands_size() && "Non-argument use?");
// U cannot be the callee operand use: since we're exploring the
// transitive uses of an Argument, having such a use be a callee would
// imply the CallSite is an indirect call or invoke; and we'd take the
// early exit above.
assert(UseIndex < CS.data_operands_size() &&
"Data operand use expected!");
bool IsOperandBundleUse = UseIndex >= CS.getNumArgOperands();