[PATCH] D94858: [STLExtras] Add a default value to drop_begin
Kazu Hirata via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Jan 18 10:17:19 PST 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGdc300beba7a8: [STLExtras] Add a default value to drop_begin (authored by kazu).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D94858/new/
https://reviews.llvm.org/D94858
Files:
llvm/include/llvm/ADT/STLExtras.h
llvm/lib/Transforms/Utils/LoopUtils.cpp
llvm/unittests/ADT/STLExtrasTest.cpp
Index: llvm/unittests/ADT/STLExtrasTest.cpp
===================================================================
--- llvm/unittests/ADT/STLExtrasTest.cpp
+++ llvm/unittests/ADT/STLExtrasTest.cpp
@@ -400,6 +400,17 @@
}
}
+TEST(STLExtrasTest, DropBeginDefaultTest) {
+ SmallVector<int, 5> vec{0, 1, 2, 3, 4};
+
+ int i = 1;
+ for (auto &v : drop_begin(vec)) {
+ EXPECT_EQ(v, i);
+ i += 1;
+ }
+ EXPECT_EQ(i, 5);
+}
+
TEST(STLExtrasTest, EarlyIncrementTest) {
std::list<int> L = {1, 2, 3, 4};
Index: llvm/lib/Transforms/Utils/LoopUtils.cpp
===================================================================
--- llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -349,7 +349,7 @@
bool Changed = false;
if (InheritAllAttrs || InheritSomeAttrs) {
- for (const MDOperand &Existing : drop_begin(OrigLoopID->operands(), 1)) {
+ for (const MDOperand &Existing : drop_begin(OrigLoopID->operands())) {
MDNode *Op = cast<MDNode>(Existing.get());
auto InheritThisAttribute = [InheritSomeAttrs,
@@ -386,7 +386,7 @@
continue;
HasAnyFollowup = true;
- for (const MDOperand &Option : drop_begin(FollowupNode->operands(), 1)) {
+ for (const MDOperand &Option : drop_begin(FollowupNode->operands())) {
MDs.push_back(Option.get());
Changed = true;
}
Index: llvm/include/llvm/ADT/STLExtras.h
===================================================================
--- llvm/include/llvm/ADT/STLExtras.h
+++ llvm/include/llvm/ADT/STLExtras.h
@@ -272,7 +272,7 @@
/// Return a range covering \p RangeOrContainer with the first N elements
/// excluded.
-template <typename T> auto drop_begin(T &&RangeOrContainer, size_t N) {
+template <typename T> auto drop_begin(T &&RangeOrContainer, size_t N = 1) {
return make_range(std::next(adl_begin(RangeOrContainer), N),
adl_end(RangeOrContainer));
}
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