[llvm] r277066 - range

[Vitaly Buka via llvm-commits]

By mistake I committed several temporarily git CLs from my local branch. It
is already reverted.


On Thu, Jul 28, 2016 at 5:14 PM David Majnemer <david.majnemer at gmail.com>
wrote:

> This commit message isn't very enlightening.  What's going on?
> Please strive for commit messages which are more descriptive.
>
> On Thu, Jul 28, 2016 at 6:50 PM, Vitaly Buka via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
>
>> Author: vitalybuka
>> Date: Thu Jul 28 17:50:43 2016
>> New Revision: 277066
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=277066&view=rev
>> Log:
>> range
>>
>> Modified:
>>     llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
>>
>> Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp?rev=277066&r1=277065&r2=277066&view=diff
>>
>> ==============================================================================
>> --- llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
>> +++ llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp Thu Jul 28
>> 17:50:43 2016
>> @@ -30,6 +30,8 @@ using namespace PatternMatch;
>>
>>  STATISTIC(NumSimplified, "Number of library calls simplified");
>>
>> +extern cl::opt<bool> ClUseAfterScope;
>> +
>>  /// Return the specified type promoted as it would be to pass though a
>> va_arg
>>  /// area.
>>  static Type *getPromotedType(Type *Ty) {
>> @@ -1209,6 +1211,10 @@ static bool removeTriviallyEmptyRange(In
>>                                        unsigned EndID, InstCombiner &IC) {
>>    assert(I.getIntrinsicID() == StartID &&
>>           "Start intrinsic does not have expected ID");
>> +  // Even if the range is empty asan need to poison memory to detect
>> invalid
>> +  // access latter.
>> +  if (ClUseAfterScope)
>> +    return false;
>>    BasicBlock::iterator BI(I), BE(I.getParent()->end());
>>    for (++BI; BI != BE; ++BI) {
>>      if (auto *E = dyn_cast<IntrinsicInst>(BI)) {
>>
>>
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>
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