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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2014-05-30 15:54:32 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2014-05-30 15:54:32 +0000 |
| commit | fcb9926813ef9bd18bf2b3aab4ab58c6522c2c5e (patch) | |
| tree | 6ad8e9a57ca6f0b0eefabe1b5e2a80d39a63e4c5 /test | |
| parent | 6319c0c5203450e9d9a79cc6d57764b97d814da2 (diff) | |
| download | llvm-fcb9926813ef9bd18bf2b3aab4ab58c6522c2c5e.tar.gz llvm-fcb9926813ef9bd18bf2b3aab4ab58c6522c2c5e.tar.bz2 llvm-fcb9926813ef9bd18bf2b3aab4ab58c6522c2c5e.tar.xz | |
PR19753: Optimize comparisons with "ashr exact" of a constanst.
Patch by suyog sarda.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209903 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -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 f45897cd3e..fd7514d9e1 100644 --- a/test/Transforms/InstCombine/icmp.ll +++ b/test/Transforms/InstCombine/icmp.ll @@ -1365,3 +1365,11 @@ define i1 @icmp_neg_cst_slt(i32 %a) { %2 = icmp slt i32 %1, -10 ret i1 %2 } + +; CHECK-LABEL: @exact_ashr_eq_false +; CHECK-NEXT: icmp eq i32 %a, 1 +define i1 @exact_ashr_eq_false(i32 %a) { + %shr = ashr exact i32 -30, %a + %cmp = icmp eq i32 %shr, -15 + ret i1 %cmp +} |