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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-07-14 01:38:42 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-07-14 01:38:42 +0000 |
| commit | 3ff25514ce24a521fc9524eefb257a1f5f262d84 (patch) | |
| tree | bbf4d09b831d59ae312e5b8a3f42dda05b6414c1 /test/CodeGen/X86/switch-bt.ll | |
| parent | d77ec6208cef2a8e615181c2bf0fc5a50a37a20b (diff) | |
| download | llvm-3ff25514ce24a521fc9524eefb257a1f5f262d84.tar.gz llvm-3ff25514ce24a521fc9524eefb257a1f5f262d84.tar.bz2 llvm-3ff25514ce24a521fc9524eefb257a1f5f262d84.tar.xz | |
Don't emit a bit test if there is only one case the test can yield false. A simple SETNE is sufficient.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135126 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/switch-bt.ll')
| -rw-r--r-- | test/CodeGen/X86/switch-bt.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/CodeGen/X86/switch-bt.ll b/test/CodeGen/X86/switch-bt.ll index 9f491d452f..8e39342214 100644 --- a/test/CodeGen/X86/switch-bt.ll +++ b/test/CodeGen/X86/switch-bt.ll @@ -79,3 +79,23 @@ if.end: ; preds = %entry } declare void @bar() + +define void @test3(i32 %x) nounwind { +; CHECK: test3: +; CHECK: cmpl $5 +; CHECK: ja +; CHECK: cmpl $4 +; CHECK: jne + switch i32 %x, label %if.end [ + i32 0, label %if.then + i32 1, label %if.then + i32 2, label %if.then + i32 3, label %if.then + i32 5, label %if.then + ] +if.then: + tail call void @bar() nounwind + ret void +if.end: + ret void +} |