diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 13 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/2007-10-23-UnalignedMemcpy.ll | 13 |
2 files changed, 26 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 610c898..71999b4 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -4329,6 +4329,19 @@ void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { } } + // Check to see if there is an unaligned memcpy from/onto the stack. If + // so, then ignore it for the present. + if (Op1.getOpcode() == ISD::FrameIndex || + Op2.getOpcode() == ISD::FrameIndex) { + unsigned TotalSize = 0; + + for (unsigned i = 0; i < NumMemOps; i++) + TotalSize += MVT::getSizeInBits(MemOps[i]) / 8; + + if (TotalSize % Align != 0) + break; + } + for (unsigned i = 0; i < NumMemOps; i++) { MVT::ValueType VT = MemOps[i]; unsigned VTSize = MVT::getSizeInBits(VT) / 8; diff --git a/test/CodeGen/PowerPC/2007-10-23-UnalignedMemcpy.ll b/test/CodeGen/PowerPC/2007-10-23-UnalignedMemcpy.ll new file mode 100644 index 0000000..c0cf201 --- /dev/null +++ b/test/CodeGen/PowerPC/2007-10-23-UnalignedMemcpy.ll @@ -0,0 +1,13 @@ +; RUN: llvm-as < %s | llc -mtriple=powerpc64-apple-darwin9 -o - | grep memcpy + +@C.0.1173 = external constant [33 x i8] ; <[33 x i8]*> [#uses=1] + +define void @Bork() { +entry: + %Qux = alloca [33 x i8] ; <[33 x i8]*> [#uses=1] + %Qux1 = bitcast [33 x i8]* %Qux to i8* ; <i8*> [#uses=1] + call void @llvm.memcpy.i64( i8* %Qux1, i8* getelementptr ([33 x i8]* @C.0.1173, i32 0, i32 0), i64 33, i32 8 ) + ret void +} + +declare void @llvm.memcpy.i64(i8*, i8*, i64, i32) |