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| author | Richard Osborne <richard@xmos.com> | 2011-09-12 14:43:23 +0000 |
|---|---|---|
| committer | Richard Osborne <richard@xmos.com> | 2011-09-12 14:43:23 +0000 |
| commit | a1d16b53e847a97846ad5df293ae1cfc3091a092 (patch) | |
| tree | bdbf06cd38d02e2801e5c9e635049653c953bd28 | |
| parent | 2cb6c1bd20ddcf27da5fb50a8a74a97a9d3010fb (diff) | |
| download | llvm-a1d16b53e847a97846ad5df293ae1cfc3091a092.tar.gz llvm-a1d16b53e847a97846ad5df293ae1cfc3091a092.tar.bz2 llvm-a1d16b53e847a97846ad5df293ae1cfc3091a092.tar.xz | |
Associate a MemOperand with LDWCP nodes introduced during ISel.
This information is required if we want LDWCP to be hoisted out of loops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139495 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/XCore/XCoreISelDAGToDAG.cpp | 11 | ||||
| -rw-r--r-- | test/CodeGen/XCore/licm-ldwcp.ll | 18 |
2 files changed, 26 insertions, 3 deletions
diff --git a/lib/Target/XCore/XCoreISelDAGToDAG.cpp b/lib/Target/XCore/XCoreISelDAGToDAG.cpp index a8dd8479d4..4dac1cee98 100644 --- a/lib/Target/XCore/XCoreISelDAGToDAG.cpp +++ b/lib/Target/XCore/XCoreISelDAGToDAG.cpp @@ -169,9 +169,14 @@ SDNode *XCoreDAGToDAGISel::Select(SDNode *N) { CurDAG->getTargetConstantPool(ConstantInt::get( Type::getInt32Ty(*CurDAG->getContext()), Val), TLI.getPointerTy()); - return CurDAG->getMachineNode(XCore::LDWCP_lru6, dl, MVT::i32, - MVT::Other, CPIdx, - CurDAG->getEntryNode()); + SDNode *node = CurDAG->getMachineNode(XCore::LDWCP_lru6, dl, MVT::i32, + MVT::Other, CPIdx, + CurDAG->getEntryNode()); + MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1); + MemOp[0] = MF->getMachineMemOperand( + MachinePointerInfo::getConstantPool(), MachineMemOperand::MOLoad, 4, 4); + cast<MachineSDNode>(node)->setMemRefs(MemOp, MemOp + 1); + return node; } break; } diff --git a/test/CodeGen/XCore/licm-ldwcp.ll b/test/CodeGen/XCore/licm-ldwcp.ll new file mode 100644 index 0000000000..4884f70e73 --- /dev/null +++ b/test/CodeGen/XCore/licm-ldwcp.ll @@ -0,0 +1,18 @@ +; RUN: llc < %s -march=xcore -asm-verbose=0 | FileCheck %s + +; MachineLICM should hoist the LDWCP out of the loop. + +; CHECK: f: +; CHECK-NEXT: ldw [[REG:r[0-9]+]], cp[.LCPI0_0] +; CHECK-NEXT: .LBB0_1: +; CHECK-NEXT: stw [[REG]], r0[0] +; CHECK-NEXT: bu .LBB0_1 + +define void @f(i32* nocapture %p) noreturn nounwind { +entry: + br label %bb + +bb: ; preds = %bb, %entry + volatile store i32 525509670, i32* %p, align 4 + br label %bb +} |