6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-19 18:24:00 +00:00
Code Issues Projects Releases Wiki Activity

ADT: Correct APInt::getActiveWords for zero values

Browse Source 
PR15138 was opened because of a segfault in the Bitcode writer.
The actual issue ended up being a bug in APInt where calls to
APInt::getActiveWords returns a bogus value when the APInt value
is 0.  This patch fixes the problem by ensuring that getActiveWords
returns 1 for 0 valued APInts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Meador Inge
2013-02-07 18:36:50 +00:00
parent def0c1f756
commit 35b1423ee6
2 changed files with 10 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
unittests/ADT/APIntTest.cpp
View File

@ -56,6 +56,14 @@ TEST(APIntTest, i33_Count) {
#endif
TEST(APIntTest, i65_Count) {
APInt i65(65, 0, true);
EXPECT_EQ(65u, i65.countLeadingZeros());
EXPECT_EQ(0u, i65.countLeadingOnes());
EXPECT_EQ(0u, i65.getActiveBits());
EXPECT_EQ(1u, i65.getActiveWords());
EXPECT_EQ(65u, i65.countTrailingZeros());
EXPECT_EQ(0u, i65.countPopulation());
APInt i65minus(65, 0, true);
i65minus.setBit(64);
EXPECT_EQ(0u, i65minus.countLeadingZeros());