From: Marshall Clow <mclow.lists@gmail.com>
Date: Mon, 27 Nov 2017 22:27:22 +0000 (+0000)
Subject: Fix problems with r'890 when building on machines where sizeof(size_t) != sizeof... 
X-Git-Tag: llvmorg-6.0.0-rc1~2576
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ea44ee202f6a73bfd832d89bd882b34cda9ca65e;p=platform%2Fupstream%2Fllvm.git

Fix problems with r'890 when building on machines where sizeof(size_t) != sizeof(unsigned long long) and C++03

llvm-svn: 319106
---

diff --git a/libcxx/include/bitset b/libcxx/include/bitset
index e26e674..cd6c289 100644
--- a/libcxx/include/bitset
+++ b/libcxx/include/bitset
@@ -235,8 +235,13 @@ void
 __bitset<_N_words, _Size>::__init(unsigned long long __v, false_type) _NOEXCEPT
 {
     __storage_type __t[sizeof(unsigned long long) / sizeof(__storage_type)];
-    for (size_t __i = 0; __i < sizeof(__t)/sizeof(__t[0]); ++__i, __v >>= __bits_per_word)
-        __t[__i] = static_cast<__storage_type>(__v);
+    size_t __sz = _Size;
+    for (size_t __i = 0; __i < sizeof(__t)/sizeof(__t[0]); ++__i, __v >>= __bits_per_word, __sz -= __bits_per_word )
+        if ( __sz < __bits_per_word)
+        	__t[__i] = static_cast<__storage_type>(__v) & ( 1ULL << __sz ) - 1;
+        else
+        	__t[__i] = static_cast<__storage_type>(__v);
+
     _VSTD::copy(__t, __t + sizeof(__t)/sizeof(__t[0]), __first_);
     _VSTD::fill(__first_ + sizeof(__t)/sizeof(__t[0]), __first_ + sizeof(__first_)/sizeof(__first_[0]),
                __storage_type(0));
@@ -248,6 +253,9 @@ void
 __bitset<_N_words, _Size>::__init(unsigned long long __v, true_type) _NOEXCEPT
 {
     __first_[0] = __v;
+    if (_Size < __bits_per_word)
+    	__first_[0] &= ( 1ULL << _Size ) - 1;
+
     _VSTD::fill(__first_ + 1, __first_ + sizeof(__first_)/sizeof(__first_[0]), __storage_type(0));
 }
 
@@ -261,7 +269,9 @@ __bitset<_N_words, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
 #if __SIZEOF_SIZE_T__ == 8
     : __first_{__v}
 #elif __SIZEOF_SIZE_T__ == 4
-    : __first_{static_cast<__storage_type>(__v), static_cast<__storage_type>(__v >> __bits_per_word)}
+    : __first_{static_cast<__storage_type>(__v), 
+    			_Size >= 2 * __bits_per_word ? static_cast<__storage_type>(__v >> __bits_per_word)
+    			: static_cast<__storage_type>((__v >> __bits_per_word) & (__storage_type(1) << (_Size - __bits_per_word)) - 1)}
 #else
 #error This constructor has not been ported to this platform
 #endif
diff --git a/libcxx/test/std/utilities/template.bitset/bitset.members/to_ullong.pass.cpp b/libcxx/test/std/utilities/template.bitset/bitset.members/to_ullong.pass.cpp
index fb35029..c4a818f 100644
--- a/libcxx/test/std/utilities/template.bitset/bitset.members/to_ullong.pass.cpp
+++ b/libcxx/test/std/utilities/template.bitset/bitset.members/to_ullong.pass.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 // test unsigned long long to_ullong() const;
+extern "C" int printf(const char *, ...);
 
 #include <bitset>
 #include <algorithm>
@@ -37,7 +38,7 @@ void test_to_ullong()
         assert(j == v.to_ullong());
     }
     { // test values bigger than can fit into the bitset
-    const unsigned long long val = 0xAAAAAAAAAAAAAAAAULL;
+    const unsigned long long val = 0x55AAAAFFFFAAAA55ULL;
     const bool canFit = N < sizeof(unsigned long long) * CHAR_BIT;
     const unsigned long long mask = canFit ? (1ULL << N) - 1 : (unsigned long long)(-1);
     std::bitset<N> v(val);
diff --git a/libcxx/test/std/utilities/template.bitset/bitset.members/to_ulong.pass.cpp b/libcxx/test/std/utilities/template.bitset/bitset.members/to_ulong.pass.cpp
index 86b4815..536c272 100644
--- a/libcxx/test/std/utilities/template.bitset/bitset.members/to_ulong.pass.cpp
+++ b/libcxx/test/std/utilities/template.bitset/bitset.members/to_ulong.pass.cpp
@@ -16,12 +16,9 @@
 #include <climits>
 #include <cassert>
 
-#include <iostream>
-
 template <std::size_t N>
 void test_to_ulong()
 {
-    std::cout << "Testing size = " << N << std::endl;
     const std::size_t M = sizeof(unsigned long) * CHAR_BIT < N ? sizeof(unsigned long) * CHAR_BIT : N;
     const bool is_M_zero = std::integral_constant<bool, M == 0>::value; // avoid compiler warnings
     const std::size_t X = is_M_zero ? sizeof(unsigned long) * CHAR_BIT - 1 : sizeof(unsigned long) * CHAR_BIT - M;
@@ -37,13 +34,12 @@ void test_to_ulong()
     for (std::size_t i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i)
     {
         std::size_t j = tests[i];
-    std::cout << "  Testing value = " << j << std::endl;
         std::bitset<N> v(j);
         assert(j == v.to_ulong());
     }
 
     { // test values bigger than can fit into the bitset
-    const unsigned long val = 0xAAAAAAAAULL;
+    const unsigned long val = 0x5AFFFFA5ULL;
     const bool canFit = N < sizeof(unsigned long) * CHAR_BIT;
     const unsigned long mask = canFit ? (1ULL << N) - 1 : (unsigned long)(-1);
     std::bitset<N> v(val);