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Fix a bug in the set(I,E)/reset(I,E) methods that I recently added. The boundary condition for checking if I and E were in the same word were incorrect, and, beyond that, the mask computation was not using a wide enough constant.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166015 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2012-10-16 06:04:27 +00:00
parent fdc054c3a3
commit e3f7be36c7
2 changed files with 16 additions and 6 deletions
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12
include/llvm/ADT/BitVector.h
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@ -244,9 +244,9 @@ public:
if (I == E) return *this;
if (I / BITWORD_SIZE == (E-1) / BITWORD_SIZE) {
BitWord EMask = 1 << (E % BITWORD_SIZE);
BitWord IMask = 1 << (I % BITWORD_SIZE);
if (I / BITWORD_SIZE == E / BITWORD_SIZE) {
BitWord EMask = 1UL << (E % BITWORD_SIZE);
BitWord IMask = 1UL << (I % BITWORD_SIZE);
BitWord Mask = EMask - IMask;
Bits[I / BITWORD_SIZE] |= Mask;
return *this;
@ -282,9 +282,9 @@ public:
if (I == E) return *this;
if (I / BITWORD_SIZE == (E-1) / BITWORD_SIZE) {
BitWord EMask = 1 << (E % BITWORD_SIZE);
BitWord IMask = 1 << (I % BITWORD_SIZE);
if (I / BITWORD_SIZE == E / BITWORD_SIZE) {
BitWord EMask = 1UL << (E % BITWORD_SIZE);
BitWord IMask = 1UL << (I % BITWORD_SIZE);
BitWord Mask = EMask - IMask;
Bits[I / BITWORD_SIZE] &= ~Mask;
return *this;

10
unittests/ADT/BitVectorTest.cpp
View File

@ -322,6 +322,16 @@ TYPED_TEST(BitVectorTest, RangeOps) {
EXPECT_FALSE(D.test(0));
EXPECT_TRUE( D.test(1));
EXPECT_TRUE( D.test(2));
TypeParam E;
E.resize(128);
E.reset();
E.set(1, 33);
EXPECT_FALSE(E.test(0));
EXPECT_TRUE( E.test(1));
EXPECT_TRUE( E.test(32));
EXPECT_FALSE(E.test(33));
}
}
#endif