diff options
| author | Dan Gohman <gohman@apple.com> | 2008-02-25 21:57:04 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-02-25 21:57:04 +0000 |
| commit | fcf81db600385be24baae2dd1c1994150e409a7b (patch) | |
| tree | 38337d98b9e907f0976ac099888117954814ee41 /lib/Target/X86/X86ISelDAGToDAG.cpp | |
| parent | f6283fd27be06021fbe262341be56331bc67786c (diff) | |
| download | llvm-fcf81db600385be24baae2dd1c1994150e409a7b.tar.gz llvm-fcf81db600385be24baae2dd1c1994150e409a7b.tar.bz2 llvm-fcf81db600385be24baae2dd1c1994150e409a7b.tar.xz | |
Remove the hack that turned an {S,U}MUL_LOHI with an unused high
result into a MUL late in the X86 codegen process. ISD::MUL is
once again Legal on X86, so this is no longer needed. And, the
hack was suboptimal; see PR1874 for details.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47567 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelDAGToDAG.cpp | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp index c8b341406c..75e9faecb2 100644 --- a/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -1224,15 +1224,6 @@ SDNode *X86DAGToDAGISel::Select(SDOperand N) { SDOperand N0 = Node->getOperand(0); SDOperand N1 = Node->getOperand(1); - // There are several forms of IMUL that just return the low part and - // don't have fixed-register operands. If we don't need the high part, - // use these instead. They can be selected with the generated ISel code. - if (NVT != MVT::i8 && - N.getValue(1).use_empty()) { - N = CurDAG->getNode(ISD::MUL, NVT, N0, N1); - break; - } - bool isSigned = Opcode == ISD::SMUL_LOHI; if (!isSigned) switch (NVT) { |