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uselistorder: Thread bit through ValueEnumerator

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Canonicalize access to whether to preserve use-list order in bitcode on
a `bool` stored in `ValueEnumerator`.  Next step, expose this as a
`bool` through `WriteBitcodeToFile()`.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234956 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-04-14 23:45:11 +00:00
parent 83ed6b7814
commit d01ee74ffa
3 changed files with 16 additions and 8 deletions
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10
lib/Bitcode/Writer/ValueEnumerator.cpp
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@ -283,9 +283,11 @@ static bool isIntOrIntVectorValue(const std::pair<const Value*, unsigned> &V) {
return V.first->getType()->isIntOrIntVectorTy();
}
ValueEnumerator::ValueEnumerator(const Module &M)
: HasMDString(false), HasMDLocation(false), HasGenericDebugNode(false) {
if (shouldPreserveBitcodeUseListOrder())
ValueEnumerator::ValueEnumerator(const Module &M,
bool ShouldPreserveUseListOrder)
: HasMDString(false), HasMDLocation(false), HasGenericDebugNode(false),
ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {
if (ShouldPreserveUseListOrder)
UseListOrders = predictUseListOrder(M);
// Enumerate the global variables.
@ -461,7 +463,7 @@ void ValueEnumerator::print(raw_ostream &OS, const MetadataMapType &Map,
void ValueEnumerator::OptimizeConstants(unsigned CstStart, unsigned CstEnd) {
if (CstStart == CstEnd || CstStart+1 == CstEnd) return;
if (shouldPreserveBitcodeUseListOrder())
if (ShouldPreserveUseListOrder)
// Optimizing constants makes the use-list order difficult to predict.
// Disable it for now when trying to preserve the order.
return;