[llvm] r216143 - [ARM] Mark VSETLNi32 with the InsertSubreg property and implement the related
Quentin Colombet
qcolombet at apple.com
Wed Aug 20 17:10:53 PDT 2014
Author: qcolombet
Date: Wed Aug 20 19:10:52 2014
New Revision: 216143
URL: http://llvm.org/viewvc/llvm-project?rev=216143&view=rev
Log:
[ARM] Mark VSETLNi32 with the InsertSubreg property and implement the related
target hook.
This patch teaches the compiler that:
dX = VSETLNi32 dY, rZ, imm
is the same as:
dX = INSERT_SUBREG dY, rZ, translateImmToSubIdx(imm)
<rdar://problem/12702965>
Modified:
llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp
llvm/trunk/lib/Target/ARM/ARMInstrInfo.h
llvm/trunk/lib/Target/ARM/ARMInstrNEON.td
Modified: llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp?rev=216143&r1=216142&r2=216143&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp Wed Aug 20 19:10:52 2014
@@ -144,6 +144,29 @@ bool ARMInstrInfo::getExtractSubregLikeI
llvm_unreachable("Target dependent opcode missing");
}
+bool ARMInstrInfo::getInsertSubregLikeInputs(
+ const MachineInstr &MI, unsigned DefIdx, RegSubRegPair &BaseReg,
+ RegSubRegPairAndIdx &InsertedReg) const {
+ assert(DefIdx < MI.getDesc().getNumDefs() && "Invalid definition index");
+ assert(MI.isInsertSubregLike() && "Invalid kind of instruction");
+
+ switch (MI.getOpcode()) {
+ case ARM::VSETLNi32:
+ // dX = VSETLNi32 dY, rZ, imm
+ const MachineOperand &MOBaseReg = MI.getOperand(1);
+ const MachineOperand &MOInsertedReg = MI.getOperand(2);
+ const MachineOperand &MOIndex = MI.getOperand(3);
+ BaseReg.Reg = MOBaseReg.getReg();
+ BaseReg.SubReg = MOBaseReg.getSubReg();
+
+ InsertedReg.Reg = MOInsertedReg.getReg();
+ InsertedReg.SubReg = MOInsertedReg.getSubReg();
+ InsertedReg.SubIdx = MOIndex.getImm() == 0 ? ARM::ssub_0 : ARM::ssub_1;
+ return true;
+ }
+ llvm_unreachable("Target dependent opcode missing");
+}
+
namespace {
/// ARMCGBR - Create Global Base Reg pass. This initializes the PIC
/// global base register for ARM ELF.
Modified: llvm/trunk/lib/Target/ARM/ARMInstrInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrInfo.h?rev=216143&r1=216142&r2=216143&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.h (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.h Wed Aug 20 19:10:52 2014
@@ -68,6 +68,23 @@ public:
bool getExtractSubregLikeInputs(const MachineInstr &MI, unsigned DefIdx,
RegSubRegPairAndIdx &InputReg) const override;
+ /// Build the equivalent inputs of a INSERT_SUBREG for the given \p MI
+ /// and \p DefIdx.
+ /// \p [out] BaseReg and \p [out] InsertedReg contain
+ /// the equivalent inputs of INSERT_SUBREG.
+ /// E.g., INSERT_SUBREG vreg0:sub0, vreg1:sub1, sub3 would produce:
+ /// - BaseReg: vreg0:sub0
+ /// - InsertedReg: vreg1:sub1, sub3
+ ///
+ /// \returns true if it is possible to build such an input sequence
+ /// with the pair \p MI, \p DefIdx. False otherwise.
+ ///
+ /// \pre MI.isInsertSubregLike().
+ bool
+ getInsertSubregLikeInputs(const MachineInstr &MI, unsigned DefIdx,
+ RegSubRegPair &BaseReg,
+ RegSubRegPairAndIdx &InsertedReg) const override;
+
private:
void expandLoadStackGuard(MachineBasicBlock::iterator MI,
Reloc::Model RM) const override;
Modified: llvm/trunk/lib/Target/ARM/ARMInstrNEON.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrNEON.td?rev=216143&r1=216142&r2=216143&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrNEON.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrNEON.td Wed Aug 20 19:10:52 2014
@@ -5499,6 +5499,9 @@ def VSETLNi32 : NVSetLane<{1,1,1,0,0,0,?
[(set DPR:$V, (insertelt (v2i32 DPR:$src1),
GPR:$R, imm:$lane))]> {
let Inst{21} = lane{0};
+ // This instruction is equivalent as
+ // $V = INSERT_SUBREG $src1, $R, translateImmToSubIdx($imm)
+ let isInsertSubreg = 1;
}
}
def : Pat<(vector_insert (v16i8 QPR:$src1), GPR:$src2, imm:$lane),
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