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| author | Nadav Rotem <nadav.rotem@intel.com> | 2012-01-10 14:28:46 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2012-01-10 14:28:46 +0000 |
| commit | 6c0366cb2588ae49ef6e2f892db2099d41d85391 (patch) | |
| tree | 027604412b0571edc47eee668db2041a20b86005 | |
| parent | 66a7fd78ee761fdf9c7f9ec13241949da3f6df24 (diff) | |
| download | llvm-6c0366cb2588ae49ef6e2f892db2099d41d85391.tar.gz llvm-6c0366cb2588ae49ef6e2f892db2099d41d85391.tar.bz2 llvm-6c0366cb2588ae49ef6e2f892db2099d41d85391.tar.xz | |
Fix a bug in the legalization of shuffle vectors. When we emulate shuffles using BUILD_VECTORS we may be using a BV of different type. Make sure to cast it back.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147851 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 4 | ||||
| -rw-r--r-- | test/CodeGen/X86/2012-1-10-buildvector.ll | 13 |
2 files changed, 16 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index e69cfd0bf4..4c5bb9e505 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -2862,8 +2862,10 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node) { Op1, DAG.getIntPtrConstant(Idx - NumElems))); } - + Tmp1 = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], Ops.size()); + // We may have changed the BUILD_VECTOR type. Cast it back to the Node type. + Tmp1 = DAG.getNode(ISD::BITCAST, dl, Node->getValueType(0), Tmp1); Results.push_back(Tmp1); break; } diff --git a/test/CodeGen/X86/2012-1-10-buildvector.ll b/test/CodeGen/X86/2012-1-10-buildvector.ll new file mode 100644 index 0000000000..4e7cbc6c14 --- /dev/null +++ b/test/CodeGen/X86/2012-1-10-buildvector.ll @@ -0,0 +1,13 @@ +; RUN: llc < %s -march=x86 -mcpu=corei7-avx -mattr=+avx -mtriple=i686-pc-win32 + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S32" +target triple = "i686-pc-win32" + +define void @bad_cast() { +entry: + %vext.i = shufflevector <2 x i64> undef, <2 x i64> undef, <3 x i32> <i32 0, i32 1, i32 undef> + %vecinit8.i = shufflevector <3 x i64> zeroinitializer, <3 x i64> %vext.i, <3 x i32> <i32 0, i32 3, i32 4> + store <3 x i64> %vecinit8.i, <3 x i64>* undef, align 32 + unreachable +} + |