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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2014-06-02 19:19:04 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2014-06-02 19:19:04 +0000 |
| commit | 83223f52e72534b3c6cd491cffa72a4642262967 (patch) | |
| tree | 8b97132a3f3b92affbebddf4c492bf7e23f9df19 /test/Transforms | |
| parent | f50e3953084cff910450ada6babf672b65ef082d (diff) | |
| download | llvm-83223f52e72534b3c6cd491cffa72a4642262967.tar.gz llvm-83223f52e72534b3c6cd491cffa72a4642262967.tar.bz2 llvm-83223f52e72534b3c6cd491cffa72a4642262967.tar.xz | |
Added support to optimize comparisons with "lshr exact" of a constant.
Patch by Rahul Jain.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210040 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstCombine/icmp.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll index dcfff99136..8e107edd76 100644 --- a/test/Transforms/InstCombine/icmp.ll +++ b/test/Transforms/InstCombine/icmp.ll @@ -1390,3 +1390,11 @@ define i1 @exact_ashr_eq_false(i32 %a) { %cmp = icmp eq i32 %shr, -15 ret i1 %cmp } + +; CHECK-LABEL: @exact_lhsr +; CHECK-NEXT: icmp eq i32 %a, 3 +define i1 @exact_lhsr(i32 %a) { + %shr = lshr exact i32 80, %a + %cmp = icmp eq i32 %shr, 10 + ret i1 %cmp +} |