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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-02-24 22:46:11 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-02-24 22:46:11 +0000 |
| commit | 9b61c550c2f1fa889163a338f5d6c02b50fe961c (patch) | |
| tree | db2081af02933bd7b35a87d9340756fab4b111e7 /test/Transforms/SimplifyCFG/select-gep.ll | |
| parent | 93c65e6e661eda75711363bdd5ca15909920e1f0 (diff) | |
| download | external_llvm-9b61c550c2f1fa889163a338f5d6c02b50fe961c.zip external_llvm-9b61c550c2f1fa889163a338f5d6c02b50fe961c.tar.gz external_llvm-9b61c550c2f1fa889163a338f5d6c02b50fe961c.tar.bz2 | |
SimplifyCFG: GEPs with constant indices are cheap enough to be executed unconditionally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126445 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyCFG/select-gep.ll')
| -rw-r--r-- | test/Transforms/SimplifyCFG/select-gep.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/select-gep.ll b/test/Transforms/SimplifyCFG/select-gep.ll new file mode 100644 index 0000000..6330ccd --- /dev/null +++ b/test/Transforms/SimplifyCFG/select-gep.ll @@ -0,0 +1,20 @@ +; RUN: opt -S -simplifycfg %s | FileCheck %s + +define i8* @test1(i8* %x) nounwind { +entry: + %tmp1 = load i8* %x, align 1 + %cmp = icmp eq i8 %tmp1, 47 + br i1 %cmp, label %if.then, label %if.end + +if.then: + %incdec.ptr = getelementptr inbounds i8* %x, i64 1 + br label %if.end + +if.end: + %x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %x, %entry ] + ret i8* %x.addr + +; CHECK: @test1 +; CHECK: %x.addr = select i1 %cmp, i8* %incdec.ptr, i8* %x +; CHECK: ret i8* %x.addr +} |