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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-06-12 22:48:00 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-06-12 22:48:00 +0000 |
| commit | ffd0ae64c497d13956d16526c46245bfbf48e91f (patch) | |
| tree | 49f581b1858c351db0553cab30050bd7a4e213a4 /test/Transforms | |
| parent | 7e7c9cc31a9c0ca337235ae04fc268e58da1d01b (diff) | |
| download | llvm-ffd0ae64c497d13956d16526c46245bfbf48e91f.tar.gz llvm-ffd0ae64c497d13956d16526c46245bfbf48e91f.tar.bz2 llvm-ffd0ae64c497d13956d16526c46245bfbf48e91f.tar.xz | |
InstCombine: Shrink ((zext X) & C1) == C2 to fold away the cast if the "zext" and the "and" have one use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132897 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstCombine/icmp.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll index 1237adee74..ecbba23091 100644 --- a/test/Transforms/InstCombine/icmp.ll +++ b/test/Transforms/InstCombine/icmp.ll @@ -521,3 +521,13 @@ define i1 @test53(i32 %a, i32 %b) nounwind { %z = icmp eq i32 %x, %y ret i1 %z } + +; CHECK: @test54 +; CHECK-NEXT: %and = and i8 %a, -64 +; CHECK-NEXT icmp eq i8 %and, -128 +define i1 @test54(i8 %a) nounwind { + %ext = zext i8 %a to i32 + %and = and i32 %ext, 192 + %ret = icmp eq i32 %and, 128 + ret i1 %ret +} |