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| author | Chris Lattner <clattner@nondot.org> | 2021-10-04 21:33:51 -0700 |
|---|---|---|
| committer | Chris Lattner <clattner@nondot.org> | 2021-10-05 08:41:53 -0700 |
| commit | cc697fc292b0a405eaa42c6c8e5f117ba4f7d73b (patch) | |
| tree | abca09d0395133e0acf64071f76719d242af32d2 /llvm/unittests/ADT/APIntTest.cpp | |
| parent | 6831c1d8689bebe745aac1fdd7354c2e2f692c1a (diff) | |
| download | llvm-cc697fc292b0a405eaa42c6c8e5f117ba4f7d73b.zip llvm-cc697fc292b0a405eaa42c6c8e5f117ba4f7d73b.tar.gz llvm-cc697fc292b0a405eaa42c6c8e5f117ba4f7d73b.tar.bz2 | |
[APInt] Make insertBits and concat work with zero width APInts.
These should both clearly work with our current model for zero width
integers, but don't until now!
Differential Revision: https://reviews.llvm.org/D111113
Diffstat (limited to 'llvm/unittests/ADT/APIntTest.cpp')
| -rw-r--r-- | llvm/unittests/ADT/APIntTest.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/llvm/unittests/ADT/APIntTest.cpp b/llvm/unittests/ADT/APIntTest.cpp index fe7a231..59a8f4c 100644 --- a/llvm/unittests/ADT/APIntTest.cpp +++ b/llvm/unittests/ADT/APIntTest.cpp @@ -1874,6 +1874,10 @@ TEST(APIntTest, insertBits) { i63.insertBits(iSrc, 4); EXPECT_EQ(static_cast<int64_t>(0x012345600123456Full), i63.getSExtValue()); + // Zero width insert is a noop. + i31.insertBits(APInt::getZeroWidth(), 1); + EXPECT_EQ(static_cast<int64_t>(0x00123456ull), i31.getSExtValue()); + // Insert single word src into one word of dst. APInt i120(120, UINT64_MAX, true); i120.insertBits(iSrc, 8); @@ -2587,7 +2591,7 @@ TEST(APIntTest, truncOrSelf) { EXPECT_EQ(0xFFFFFFFF, val.truncOrSelf(64)); } -TEST(APIntTest, concatMSB) { +TEST(APIntTest, concat) { APInt Int1(4, 0x1ULL); APInt Int3(4, 0x3ULL); @@ -2597,6 +2601,11 @@ TEST(APIntTest, concatMSB) { APInt I64(64, 0x3ULL); EXPECT_EQ(I64, I64.concat(I64).lshr(64).trunc(64)); + + APInt I65(65, 0x3ULL); + APInt I0 = APInt::getZeroWidth(); + EXPECT_EQ(I65, I65.concat(I0)); + EXPECT_EQ(I65, I0.concat(I65)); } TEST(APIntTest, multiply) { |