diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 9 | ||||
| -rw-r--r-- | llvm/test/CodeGen/MSP430/umulo-16.ll | 32 |
2 files changed, 41 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index d970ff49bba..7a04e0d033a 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -3515,6 +3515,15 @@ bool SelectionDAGLegalize::ExpandNode(SDNode *Node) { TopHalf = DAG.getSetCC(dl, getSetCCResultType(VT), TopHalf, DAG.getConstant(0, dl, VT), ISD::SETNE); } + + // Truncate the result if SetCC returns a larger type than needed. + EVT RType = Node->getValueType(1); + if (RType.getSizeInBits() < TopHalf.getValueSizeInBits()) + TopHalf = DAG.getNode(ISD::TRUNCATE, dl, RType, TopHalf); + + assert(RType.getSizeInBits() == TopHalf.getValueSizeInBits() && + "Unexpected result type for S/UMULO legalization"); + Results.push_back(BottomHalf); Results.push_back(TopHalf); break; diff --git a/llvm/test/CodeGen/MSP430/umulo-16.ll b/llvm/test/CodeGen/MSP430/umulo-16.ll new file mode 100644 index 00000000000..bd421379147 --- /dev/null +++ b/llvm/test/CodeGen/MSP430/umulo-16.ll @@ -0,0 +1,32 @@ +; RUN: llc < %s -march=msp430 | FileCheck %s +target datalayout = "e-m:e-p:16:16-i32:16:32-a:16-n8:16" +target triple = "msp430" + +define void @foo(i16 %arg) unnamed_addr { +entry-block: + br i1 undef, label %bb2, label %bb3 + +bb2: ; preds = %entry-block + unreachable + +bb3: ; preds = %entry-block + %0 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 undef, i16 %arg) +; CHECK: call + %1 = extractvalue { i16, i1 } %0, 1 + %2 = call i1 @llvm.expect.i1(i1 %1, i1 false) + br i1 %2, label %panic, label %bb5 + +bb5: ; preds = %bb3 + unreachable + +panic: ; preds = %bb3 + unreachable +} + +; Function Attrs: nounwind readnone +declare i1 @llvm.expect.i1(i1, i1) #0 + +; Function Attrs: nounwind readnone +declare { i16, i1 } @llvm.umul.with.overflow.i16(i16, i16) #0 + +attributes #0 = { nounwind readnone } |
