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| author | Craig Topper <craig.topper@sifive.com> | 2023-01-14 11:18:47 -0800 |
|---|---|---|
| committer | Craig Topper <craig.topper@sifive.com> | 2023-01-14 11:18:47 -0800 |
| commit | ff39b7ea89476c78177aff5cb0ddb441e74c8838 (patch) | |
| tree | 186ec8a27b4d0fe8542b7db9811599e61747fb02 /clang/lib/Sema/SemaModule.cpp | |
| parent | a1580d7b59b65b17f2ce7fdb95f46379e7df4089 (diff) | |
| download | llvm-ff39b7ea89476c78177aff5cb0ddb441e74c8838.zip llvm-ff39b7ea89476c78177aff5cb0ddb441e74c8838.tar.gz llvm-ff39b7ea89476c78177aff5cb0ddb441e74c8838.tar.bz2 | |
[InstCombine] Optimize (icmp slt (1 << Y), 1) -> (icmp eq Y, BitWidth-1).
The code tried to do this for (icmp sle (1 << Y), 0), but that is
canonicalized to sgt before we get there.
Simplify the code by removing the unreachable SGE and SLE handling.
Also remove the (1 << Y) >=u 2147483648 and (1 << Y) <u 2147483648
handling since those are canonicalized to (1 << Y) <s 0 and
(1 << Y) >=s 0 before we get there.
Reviewed By: spatel
Differential Revision: https://reviews.llvm.org/D141753
Diffstat (limited to 'clang/lib/Sema/SemaModule.cpp')
0 files changed, 0 insertions, 0 deletions