| commit | d3028ae838e70097df9b8b2a790d844d0668a498 | [log] [tgz] |
|---|---|---|
| author | Vedant Kumar <vsk@apple.com> | Tue Dec 18 21:05:03 2018 +0000 |
| committer | Vedant Kumar <vsk@apple.com> | Tue Dec 18 21:05:03 2018 +0000 |
| tree | 9ac561f1bf4d32b24cc710d5321bb31715ee981c | |
| parent | 2801c2a2b5db82d5dd1833bb3344f8411b42f5d2 [diff] |
[CodeGen] Handle mixed-width ops in mixed-sign mul-with-overflow lowering The special lowering for __builtin_mul_overflow introduced in r320902 fixed an ICE seen when passing mixed-sign operands to the builtin. This patch extends the special lowering to cover mixed-width, mixed-sign operands. In a few common scenarios, calls to muloti4 will no longer be emitted. This should address the latest comments in PR34920 and work around the link failure seen in: https://bugzilla.redhat.com/show_bug.cgi?id=1657544 Testing: - check-clang - A/B output comparison with: https://gist.github.com/vedantk/3eb9c88f82e5c32f2e590555b4af5081 Differential Revision: https://reviews.llvm.org/D55843 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@349542 91177308-0d34-0410-b5e6-96231b3b80d8