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| author | Akira Hatanaka <ahatanaka@mips.com> | 2011-12-19 19:28:37 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2011-12-19 19:28:37 +0000 |
| commit | 89dc8d790d1ab3c903dfdf211f651350438a72fe (patch) | |
| tree | 77edabfbaf6662bda4fffbf887e7a5e8111b424c /lib/Target/Mips/MipsISelDAGToDAG.cpp | |
| parent | 9c39789c361d4fe2632f28fca74c9ea5fff3dafc (diff) | |
| download | external_llvm-89dc8d790d1ab3c903dfdf211f651350438a72fe.zip external_llvm-89dc8d790d1ab3c903dfdf211f651350438a72fe.tar.gz external_llvm-89dc8d790d1ab3c903dfdf211f651350438a72fe.tar.bz2 | |
Remove the restriction on the first operand of the add node in SelectAddr.
This change reduces the number of instructions generated.
For example,
(load (add (sub $n0, $n1), (MipsLo got(s))))
results in the following sequence of instructions:
1. sub $n2, $n0, $n1
2. lw got(s)($n2)
Previously, three instructions were needed.
1. sub $n2, $n0, $n1
2. addiu $n3, $n2, got(s)
3. lw 0($n3)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146888 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips/MipsISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsISelDAGToDAG.cpp | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/Target/Mips/MipsISelDAGToDAG.cpp b/lib/Target/Mips/MipsISelDAGToDAG.cpp index b17239d..4ac51e8 100644 --- a/lib/Target/Mips/MipsISelDAGToDAG.cpp +++ b/lib/Target/Mips/MipsISelDAGToDAG.cpp @@ -160,9 +160,7 @@ SelectAddr(SDValue Addr, SDValue &Base, SDValue &Offset) { // Generate: // lui $2, %hi($CPI1_0) // lwc1 $f0, %lo($CPI1_0)($2) - if ((Addr.getOperand(0).getOpcode() == MipsISD::Hi || - Addr.getOperand(0).getOpcode() == ISD::LOAD) && - Addr.getOperand(1).getOpcode() == MipsISD::Lo) { + if (Addr.getOperand(1).getOpcode() == MipsISD::Lo) { SDValue LoVal = Addr.getOperand(1); if (isa<ConstantPoolSDNode>(LoVal.getOperand(0)) || isa<GlobalAddressSDNode>(LoVal.getOperand(0))) { |