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| author | Dan Gohman <gohman@apple.com> | 2009-06-16 19:52:01 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-06-16 19:52:01 +0000 |
| commit | 61ffa8e37394faca53167b4bbeb3866404745f3a (patch) | |
| tree | 5a24d2c0527d2a08d4452a32893df0dc77412b2d /test/Transforms/IndVarSimplify | |
| parent | 876eac9da5f53d34f8d89065eb2837a0759f198a (diff) | |
| download | llvm-61ffa8e37394faca53167b4bbeb3866404745f3a.tar.gz llvm-61ffa8e37394faca53167b4bbeb3866404745f3a.tar.bz2 llvm-61ffa8e37394faca53167b4bbeb3866404745f3a.tar.xz | |
Instcombine's ShrinkDemandedConstant may strip bits out of constants,
obscuring what would otherwise be a low-bits mask. Use ComputeMaskedBits
to compute what ShrinkDemandedConstant knew about to reconstruct a
low-bits mask value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73540 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify')
| -rw-r--r-- | test/Transforms/IndVarSimplify/shrunk-constant.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/shrunk-constant.ll b/test/Transforms/IndVarSimplify/shrunk-constant.ll new file mode 100644 index 0000000000..f783b8305e --- /dev/null +++ b/test/Transforms/IndVarSimplify/shrunk-constant.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | opt -iv-users -analyze | grep store + +define fastcc void @foo() nounwind { +entry: + br label %loop + +loop: + %i = phi i32 [ 0, %entry ], [ %t2, %loop ] + %t0 = add i32 %i, 9 + %t1 = and i32 %t0, 9 + store i32 %t1, i32* null + %t2 = add i32 %i, 8 + br label %loop +} |