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[IR] Fix MSVC warning (NFC)

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As requested by Andrew Kaylor, rewrite this code in a way that does
not warn on old MSVC versions.

Avoid the buggy constexpr warning by just not using constexpr and
removing the static_assert that depends on it.
This commit is contained in:
Nikita Popov 2020-07-17 18:25:56 +02:00
parent 598efdf414
commit 9f13e86ec9
1 changed files with 2 additions and 4 deletions
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6
lib/IR/Attributes.cpp
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@ -969,7 +969,7 @@ std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
/// Map from AttributeList index to the internal array index. Adding one happens
/// to work, because -1 wraps around to 0.
static constexpr unsigned attrIdxToArrayIdx(unsigned Index) {
static unsigned attrIdxToArrayIdx(unsigned Index) {
return Index + 1;
}
@ -982,9 +982,7 @@ AttributeListImpl::AttributeListImpl(ArrayRef<AttributeSet> Sets)
// Initialize AvailableFunctionAttrs and AvailableSomewhereAttrs
// summary bitsets.
static_assert(attrIdxToArrayIdx(AttributeList::FunctionIndex) == 0U,
"function should be stored in slot 0");
for (const auto &I : Sets[0])
for (const auto &I : Sets[attrIdxToArrayIdx(AttributeList::FunctionIndex)])
if (!I.isStringAttribute())
AvailableFunctionAttrs.addAttribute(I.getKindAsEnum());