diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp | 4 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/2012-10-12-bitcast.ll | 20 |
2 files changed, 24 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp index bb54fd24e2..6bcb3b25e9 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp @@ -124,6 +124,10 @@ void DAGTypeLegalizer::ExpandRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi) { // there are only two nodes left, i.e. Lo and Hi. SDValue LHS = Vals[Slot]; SDValue RHS = Vals[Slot + 1]; + + if (TLI.isBigEndian()) + std::swap(LHS, RHS); + Vals.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, EVT::getIntegerVT( *DAG.getContext(), diff --git a/test/CodeGen/PowerPC/2012-10-12-bitcast.ll b/test/CodeGen/PowerPC/2012-10-12-bitcast.ll new file mode 100644 index 0000000000..e7dc706a88 --- /dev/null +++ b/test/CodeGen/PowerPC/2012-10-12-bitcast.ll @@ -0,0 +1,20 @@ +; RUN: llc < %s | FileCheck %s +target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +define i32 @test(<16 x i8> %v) nounwind { +entry: + %0 = bitcast <16 x i8> %v to i128 + %1 = lshr i128 %0, 96 + %2 = trunc i128 %1 to i32 + ret i32 %2 +} + +; Verify that bitcast handles big-endian platforms correctly +; by checking we load the result from the correct offset + +; CHECK: addi [[REGISTER:[0-9]+]], 1, -16 +; CHECK: stvx 2, 0, [[REGISTER]] +; CHECK: lwz 3, -16(1) +; CHECK: blr + |