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| author | Evan Cheng <evan.cheng@apple.com> | 2010-01-08 02:36:12 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-01-08 02:36:12 +0000 |
| commit | 6f279e0bda35a35740cc8c5479d579890bc1d3f7 (patch) | |
| tree | 08d556290ff7debfe8c6104fd50dcb50927cb422 | |
| parent | b093bd0565b1f5c93c2696f6ec712b2e61551c5b (diff) | |
ReplaceAllUsesOfValueWith may delete other nodes that the one being replaced. Do not delete dead nodes again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92988 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 3 | ||||
| -rw-r--r-- | test/CodeGen/X86/2010-01-07-ISelBug.ll | 27 |
2 files changed, 29 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 10dcc09c8e..c87e4bf716 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -459,7 +459,8 @@ void SelectionDAGISel::ShrinkDemandedOps() { SDNode *N = Worklist.pop_back_val(); if (N->use_empty() && N != CurDAG->getRoot().getNode()) { - CurDAG->DeleteNode(N); + if (N->getOpcode() != ISD::DELETED_NODE) + CurDAG->DeleteNode(N); continue; } diff --git a/test/CodeGen/X86/2010-01-07-ISelBug.ll b/test/CodeGen/X86/2010-01-07-ISelBug.ll new file mode 100644 index 0000000000..081fab7fac --- /dev/null +++ b/test/CodeGen/X86/2010-01-07-ISelBug.ll @@ -0,0 +1,27 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin10 +; rdar://r7519827 + +define i32 @t() nounwind ssp { +entry: + br label %if.end.i11 + +if.end.i11: ; preds = %lor.lhs.false.i10, %lor.lhs.false.i10, %lor.lhs.false.i10 + br i1 undef, label %for.body161, label %for.end197 + +for.body161: ; preds = %if.end.i11 + br label %for.end197 + +for.end197: ; preds = %for.body161, %if.end.i11 + %mlucEntry.4 = phi i96 [ undef, %for.body161 ], [ undef, %if.end.i11 ] ; <i96> [#uses=2] + store i96 %mlucEntry.4, i96* undef, align 8 + %tmp172 = lshr i96 %mlucEntry.4, 64 ; <i96> [#uses=1] + %tmp173 = trunc i96 %tmp172 to i32 ; <i32> [#uses=1] + %tmp1.i1.i = call i32 @llvm.bswap.i32(i32 %tmp173) nounwind ; <i32> [#uses=1] + store i32 %tmp1.i1.i, i32* undef, align 8 + unreachable + +if.then283: ; preds = %lor.lhs.false.i10, %do.end105, %for.end + ret i32 undef +} + +declare i32 @llvm.bswap.i32(i32) nounwind readnone |