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Add tests to Support/MathExtras 

In r271380, I added several functions to get the minimum/maximum values
of n-width integers.

This just adds tests for them.

llvm-svn: 271505
This commit is contained in:
Dylan McKay 2016-06-02 09:00:53 +00:00
parent 7ae684a8b4
commit a9ba12d8b0
1 changed files with 29 additions and 0 deletions
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29
llvm/unittests/Support/MathExtrasTest.cpp
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@ -106,6 +106,35 @@ TEST(MathExtras, findLastSet) {
EXPECT_EQ(5u, findLastSet(NZ64));
}
TEST(MathExtras, isIntN) {
EXPECT_TRUE(isIntN(16, 32767));
EXPECT_FALSE(isIntN(16, 32768));
}
TEST(MathExtras, isUIntN) {
EXPECT_TRUE(isUIntN(16, 65535));
EXPECT_FALSE(isUIntN(16, 65536));
EXPECT_TRUE(isUIntN(1, 0));
EXPECT_TRUE(isUIntN(6, 63));
}
TEST(MathExtras, maxIntN) {
EXPECT_EQ(32767, maxIntN(16));
EXPECT_EQ(2147483647, maxIntN(32));
}
TEST(MathExtras, minIntN) {
EXPECT_EQ(-32768LL, minIntN(16));
EXPECT_EQ(-64LL, minIntN(7));
}
TEST(MathExtras, maxUIntN) {
EXPECT_EQ(0xffffULL, maxUIntN(16));
EXPECT_EQ(0xffffffffULL, maxUIntN(32));
EXPECT_EQ(1ULL, maxUIntN(1));
EXPECT_EQ(0x0fULL, maxUIntN(4));
}
TEST(MathExtras, reverseBits) {
uint8_t NZ8 = 42;
uint16_t NZ16 = 42;