Export of internal Abseil changes.

--
1a5fb4eb5bc6c0332962f659470a07908168aa5c by CJ Johnson <johnsoncj@google.com>:

Move InlinedVector's AbslHashValue(...) definition to out of line

PiperOrigin-RevId: 224389234

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b7c5ccdfe17b9cb5f7124c8d591ce0989a15b9fb by Jon Cohen <cohenjon@google.com>:

Add a shebang line and chmod +x generate_copts.py.  Note that we use the "python" command as suggested in PEP 934 (https://www.python.org/dev/peps/pep-0394/) as this script should work in both Python 2 and Python 3.

Also adds a gitignore for __pycache__ for when using python3

PiperOrigin-RevId: 224375405

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c57a148a1106b21dbcd750541f10b058bf55a2bf by CJ Johnson <johnsoncj@google.com>:

Adds comment to InlinedVector intended to help the g4 diffing algo to better identify the substantive change

PiperOrigin-RevId: 224362807

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b635ab981a07dc2434be7b0d164030a42cc67923 by Greg Falcon <gfalcon@google.com>:

internal change

PiperOrigin-RevId: 224362442

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217021f7dcec31141a89b91930c241af062c2133 by CJ Johnson <johnsoncj@google.com>:

Distinguishes the source of InlinedVector::at(...)'s bounds checking exception

PiperOrigin-RevId: 224341645

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01a5943560ce9216a9d8ccb1279b5c5c2f6e1019 by CJ Johnson <johnsoncj@google.com>:

Relocates out of line member function definitions to their respective declarations in InlinedVector

PiperOrigin-RevId: 224320130

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b3d57fcddcd737e91aab812d69b82fef2ca43d7e by Abseil Team <absl-team@google.com>:

On 32-bit systems, the alignment of int64 can be 4 bytes. Created a custom Int64 type (to go with the custom Int128 type) just for the purpose of testing layouts and alignments; it doesn't need to support actual arithmetic.

PiperOrigin-RevId: 224209785
GitOrigin-RevId: 1a5fb4eb5bc6c0332962f659470a07908168aa5c
Change-Id: I9d6b1c441cd712709ebd6c0a8911d0755cab506f

1 files changed, 19 insertions, 9 deletions

diff --git a/absl/container/internal/layout_test.cc b/absl/container/internal/layout_test.cc
index 224f741a..301e9f78 100644
--- a/absl/container/internal/layout_test.cc
+++ b/absl/container/internal/layout_test.cc
@@ -45,7 +45,7 @@ Expected Type(Actual val) {
   return val;
 }
 
-// Helper class to test different size and alignments.
+// Helper classes to test different size and alignments.
 struct alignas(8) Int128 {
   uint64_t a, b;
   friend bool operator==(Int128 lhs, Int128 rhs) {
@@ -57,6 +57,14 @@ struct alignas(8) Int128 {
   }
 };
 
+// int64_t is *not* 8-byte aligned on all platforms!
+struct alignas(8) Int64 {
+  int64_t a;
+  friend bool operator==(Int64 lhs, Int64 rhs) {
+    return lhs.a == rhs.a;
+  }
+};
+
 // Properties of types that this test relies on.
 static_assert(sizeof(int8_t) == 1, "");
 static_assert(alignof(int8_t) == 1, "");
@@ -64,6 +72,8 @@ static_assert(sizeof(int16_t) == 2, "");
 static_assert(alignof(int16_t) == 2, "");
 static_assert(sizeof(int32_t) == 4, "");
 static_assert(alignof(int32_t) == 4, "");
+static_assert(sizeof(Int64) == 8, "");
+static_assert(alignof(Int64) == 8, "");
 static_assert(sizeof(Int128) == 16, "");
 static_assert(alignof(Int128) == 8, "");
 
@@ -1281,14 +1291,14 @@ TEST(Layout, OverAligned) {
 TEST(Layout, Alignment) {
   static_assert(Layout<int8_t>::Alignment() == 1, "");
   static_assert(Layout<int32_t>::Alignment() == 4, "");
-  static_assert(Layout<int64_t>::Alignment() == 8, "");
+  static_assert(Layout<Int64>::Alignment() == 8, "");
   static_assert(Layout<Aligned<int8_t, 64>>::Alignment() == 64, "");
-  static_assert(Layout<int8_t, int32_t, int64_t>::Alignment() == 8, "");
-  static_assert(Layout<int8_t, int64_t, int32_t>::Alignment() == 8, "");
-  static_assert(Layout<int32_t, int8_t, int64_t>::Alignment() == 8, "");
-  static_assert(Layout<int32_t, int64_t, int8_t>::Alignment() == 8, "");
-  static_assert(Layout<int64_t, int8_t, int32_t>::Alignment() == 8, "");
-  static_assert(Layout<int64_t, int32_t, int8_t>::Alignment() == 8, "");
+  static_assert(Layout<int8_t, int32_t, Int64>::Alignment() == 8, "");
+  static_assert(Layout<int8_t, Int64, int32_t>::Alignment() == 8, "");
+  static_assert(Layout<int32_t, int8_t, Int64>::Alignment() == 8, "");
+  static_assert(Layout<int32_t, Int64, int8_t>::Alignment() == 8, "");
+  static_assert(Layout<Int64, int8_t, int32_t>::Alignment() == 8, "");
+  static_assert(Layout<Int64, int32_t, int8_t>::Alignment() == 8, "");
 }
 
 TEST(Layout, ConstexprPartial) {
@@ -1323,7 +1333,7 @@ void ExpectPoisoned(const unsigned char (&buf)[N],
 }
 
 TEST(Layout, PoisonPadding) {
-  using L = Layout<int8_t, int64_t, int32_t, Int128>;
+  using L = Layout<int8_t, Int64, int32_t, Int128>;
 
   constexpr size_t n = L::Partial(1, 2, 3, 4).AllocSize();
   {