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author | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-09-24 13:33:07 +0000 |
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committer | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-09-24 13:33:07 +0000 |
commit | acfa5a203c01d99aac1bdc1e045c08153bcdbbf6 (patch) | |
tree | cf4cd051e24f258f85e61dc004a1b1ea017550b2 /lib/Target/Mips/MipsSEISelDAGToDAG.h | |
parent | ad16ddeb8e07a259d17ef203c9f443f816f6ae7b (diff) | |
download | llvm-acfa5a203c01d99aac1bdc1e045c08153bcdbbf6.tar.gz llvm-acfa5a203c01d99aac1bdc1e045c08153bcdbbf6.tar.bz2 llvm-acfa5a203c01d99aac1bdc1e045c08153bcdbbf6.tar.xz |
[mips][msa] Remove the VSPLAT and VSPLATD nodes in favour of matching BUILD_VECTOR.
Most constant BUILD_VECTOR's are matched using ComplexPatterns which cover
bitcasted as well as normal vectors. However, it doesn't seem to be possible to
match ldi.[bhwd] in a type-agnostic manner (e.g. to support the widest range of
immediates, it should be possible to use ldi.b to load v2i64) using TableGen so
ldi.[bhwd] is matched using custom code in MipsSEISelDAGToDAG.cpp
This made the majority of the constant splat BUILD_VECTOR lowering redundant.
The only transformation remaining for constant splats is when an (up-to) 32-bit
constant splat is possible but the value does not fit into a 10-bit signed
integer. In this case, the BUILD_VECTOR is transformed into a bitcasted
BUILD_VECTOR so that fill.[bhw] can be used to splat the vector from a GPR32
register (which is initialized using the usual lui/addui sequence).
There are no additional tests since this is a re-implementation of previous
functionality. The change is intended to make it easier to implement some of
the upcoming instruction selection patches since they can rely on existing
support for BUILD_VECTOR's in the DAGCombiner.
compare_float.ll changed slightly because a BITCAST is no longer
introduced during legalization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191299 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips/MipsSEISelDAGToDAG.h')
-rw-r--r-- | lib/Target/Mips/MipsSEISelDAGToDAG.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsSEISelDAGToDAG.h b/lib/Target/Mips/MipsSEISelDAGToDAG.h index 22e597ebf8..fe0da12aa3 100644 --- a/lib/Target/Mips/MipsSEISelDAGToDAG.h +++ b/lib/Target/Mips/MipsSEISelDAGToDAG.h @@ -58,6 +58,26 @@ private: virtual bool selectIntAddrMM(SDValue Addr, SDValue &Base, SDValue &Offset) const; + /// \brief Select constant vector splats. + virtual bool selectVSplat(SDNode *N, APInt &Imm) const; + /// \brief Select constant vector splats whose value fits in a given integer. + virtual bool selectVSplatCommon(SDValue N, SDValue &Imm, bool Signed, + unsigned ImmBitSize) const; + /// \brief Select constant vector splats whose value fits in a uimm3. + virtual bool selectVSplatUimm3(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value fits in a uimm4. + virtual bool selectVSplatUimm4(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value fits in a uimm5. + virtual bool selectVSplatUimm5(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value fits in a uimm6. + virtual bool selectVSplatUimm6(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value fits in a uimm8. + virtual bool selectVSplatUimm8(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value fits in a simm5. + virtual bool selectVSplatSimm5(SDValue N, SDValue &Imm) const; + /// \brief Select constant vector splats whose value is a power of 2. + virtual bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const; + virtual std::pair<bool, SDNode*> selectNode(SDNode *Node); virtual void processFunctionAfterISel(MachineFunction &MF); |