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| author | Chris Lattner <sabre@nondot.org> | 2005-08-05 00:59:55 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-08-05 00:59:55 +0000 |
| commit | 2733b30195f1681141576b5463778ffa625516d4 (patch) | |
| tree | bae21c109e9886539cc14886a56954481424728f | |
| parent | 5e1b23192184aadbfbd79a31641eb3c0c0ecdc05 (diff) | |
new testcase that condprop should handle. The PHI node becomes useless
after threading the branch, because both operands are the same value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22668 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | test/Transforms/CondProp/phisimplify2.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/CondProp/phisimplify2.ll b/test/Transforms/CondProp/phisimplify2.ll new file mode 100644 index 0000000000..177dac540b --- /dev/null +++ b/test/Transforms/CondProp/phisimplify2.ll @@ -0,0 +1,36 @@ +; RUN: llvm-as < %s | opt -condprop | llvm-dis | not grep phi + +declare bool %foo() + +int %test(uint %C) { + %Val = call bool %foo() + switch uint %C, label %T1 [ + uint 4, label %T2 + uint 17, label %T3 + ] +T1: + call void %a() + br label %Cont +T2: + call void %b() + br label %Cont +T3: + call void %c() + br label %Cont + +Cont: + ;; PHI becomes dead after threading T2 + %C2 = phi bool [%Val, %T1], [true, %T2], [%Val, %T3] + br bool %C2, label %L2, label %F2 +L2: + call void %d() + ret int 17 +F2: + call void %e() + ret int 1 +} +declare void %a() +declare void %b() +declare void %c() +declare void %d() +declare void %e() |