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| author | Dan Gohman <gohman@apple.com> | 2009-09-26 16:11:57 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-09-26 16:11:57 +0000 |
| commit | c70c37794fbff2c615d4f9dc3b6adf9583b855dc (patch) | |
| tree | 985e38013dcf7bdf938042fdefec440e5c4e6e25 /test/Transforms/IndVarSimplify | |
| parent | 3548ea8e905269e819fdd4c7fab42142b745c6c5 (diff) | |
| download | external_llvm-c70c37794fbff2c615d4f9dc3b6adf9583b855dc.zip external_llvm-c70c37794fbff2c615d4f9dc3b6adf9583b855dc.tar.gz external_llvm-c70c37794fbff2c615d4f9dc3b6adf9583b855dc.tar.bz2 | |
Fix a case where ScalarEvolution was expanding pointer arithmetic
to inttoptr/ptrtoint unnecessarily.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82864 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify')
| -rw-r--r-- | test/Transforms/IndVarSimplify/preserve-gep-loop-variant.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/preserve-gep-loop-variant.ll b/test/Transforms/IndVarSimplify/preserve-gep-loop-variant.ll new file mode 100644 index 0000000..86e90c7 --- /dev/null +++ b/test/Transforms/IndVarSimplify/preserve-gep-loop-variant.ll @@ -0,0 +1,41 @@ +; RUN: opt < %s -indvars -S > %t +; RUN: not grep inttoptr %t +; RUN: not grep ptrtoint %t +; RUN: grep scevgep %t + +; Indvars shouldn't need inttoptr/ptrtoint to expand an address here. + +define void @foo(i8* %p) nounwind { +entry: + br i1 true, label %bb.nph, label %for.end + +for.cond: + %phitmp = icmp slt i64 %inc, 20 + br i1 %phitmp, label %for.body, label %for.cond.for.end_crit_edge + +for.cond.for.end_crit_edge: + br label %for.end + +bb.nph: + br label %for.body + +for.body: + %storemerge1 = phi i64 [ %inc, %for.cond ], [ 0, %bb.nph ] + %call = tail call i64 @bar() nounwind + %call2 = tail call i64 @car() nounwind + %conv = trunc i64 %call2 to i8 + %conv3 = sext i8 %conv to i64 + %add = add nsw i64 %call, %storemerge1 + %add4 = add nsw i64 %add, %conv3 + %arrayidx = getelementptr inbounds i8* %p, i64 %add4 + store i8 0, i8* %arrayidx + %inc = add nsw i64 %storemerge1, 1 + br label %for.cond + +for.end: + ret void +} + +declare i64 @bar() + +declare i64 @car() |