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[ADT] Add initializer_list constructor to SmallDenseMap

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Make it easier to initialize small maps inline. Note that DenseMap already has an initializer_list constructor.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D106363
This commit is contained in:
Jakub Kuderski 2021-07-20 17:31:14 -04:00
parent 94824eaca5
commit fe1c7a103a
2 changed files with 12 additions and 0 deletions
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3
include/llvm/ADT/DenseMap.h
View File

@ -924,6 +924,9 @@ public:
this->insert(I, E);
}
SmallDenseMap(std::initializer_list<typename BaseT::value_type> Vals)
: SmallDenseMap(Vals.begin(), Vals.end()) {}
~SmallDenseMap() {
this->destroyAll();
deallocateBuckets();

9
unittests/ADT/DenseMapTest.cpp
View File

@ -547,6 +547,15 @@ TEST(DenseMapCustomTest, FindAsTest) {
EXPECT_TRUE(map.find_as("d") == map.end());
}
TEST(DenseMapCustomTest, SmallDenseMapInitializerList) {
SmallDenseMap<int, int> M = {{0, 0}, {0, 1}, {1, 2}};
EXPECT_EQ(2u, M.size());
EXPECT_EQ(1u, M.count(0));
EXPECT_EQ(0, M[0]);
EXPECT_EQ(1u, M.count(1));
EXPECT_EQ(2, M[1]);
}
struct ContiguousDenseMapInfo {
static inline unsigned getEmptyKey() { return ~0; }
static inline unsigned getTombstoneKey() { return ~0U - 1; }