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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2012-04-10 00:16:22 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2012-04-10 00:16:22 +0000 |
| commit | fdb230a154ead49cf0ded5b4587be994ec2f43e0 (patch) | |
| tree | 5f06fe3d706c779f383e7b64a0e7500449c6c714 | |
| parent | 2d620c571cb53993b788893b6ef73a6e2805411f (diff) | |
| download | llvm-fdb230a154ead49cf0ded5b4587be994ec2f43e0.tar.gz llvm-fdb230a154ead49cf0ded5b4587be994ec2f43e0.tar.bz2 llvm-fdb230a154ead49cf0ded5b4587be994ec2f43e0.tar.xz | |
Don't try to zExt just to check if an integer constant is zero, it might
not fit in a i64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154364 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 | ||||
| -rw-r--r-- | test/CodeGen/Generic/pr12507.ll | 18 |
2 files changed, 20 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index dbc1ca909a..cf7ce587f3 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4431,9 +4431,9 @@ static bool isTruncateOf(SelectionDAG &DAG, SDValue N, SDValue &Op, ConstantSDNode *COp0 = dyn_cast<ConstantSDNode>(Op0); ConstantSDNode *COp1 = dyn_cast<ConstantSDNode>(Op1); - if (COp0 && COp0->getZExtValue() == 0) + if (COp0 && COp0->isNullValue()) Op = Op1; - else if (COp1 && COp1->getZExtValue() == 0) + else if (COp1 && COp1->isNullValue()) Op = Op0; else return false; diff --git a/test/CodeGen/Generic/pr12507.ll b/test/CodeGen/Generic/pr12507.ll new file mode 100644 index 0000000000..c793358506 --- /dev/null +++ b/test/CodeGen/Generic/pr12507.ll @@ -0,0 +1,18 @@ +; RUN: llc < %s + +@c = external global i32, align 4 + +define void @foo(i160 %x) { +entry: + %cmp.i = icmp ne i160 %x, 340282366920938463463374607431768211456 + %conv.i = zext i1 %cmp.i to i32 + %tobool.i = icmp eq i32 %conv.i, 0 + br i1 %tobool.i, label %if.then.i, label %fn1.exit + +if.then.i: + store i32 0, i32* @c, align 4 + br label %fn1.exit + +fn1.exit: + ret void +} |