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| author | Amaury Sechet <deadalnix@gmail.com> | 2017-06-01 11:14:17 +0000 |
|---|---|---|
| committer | Amaury Sechet <deadalnix@gmail.com> | 2017-06-01 11:14:17 +0000 |
| commit | 251ea8a4f8b775d9fc39e25e208ff55ef86090c8 (patch) | |
| tree | 9f8679f45701f0c20a5539217a6f29fd726c7c21 /llvm/lib/Target/X86/X86ISelLowering.h | |
| parent | 6506a90a703ba1c034602b07cce81f633aebf9e4 (diff) | |
| download | bcm5719-llvm-251ea8a4f8b775d9fc39e25e208ff55ef86090c8.tar.gz bcm5719-llvm-251ea8a4f8b775d9fc39e25e208ff55ef86090c8.zip | |
Do not legalize large setcc with setcce, introduce setcccarry and do it with usubo/setcccarry.
Summary:
This is a continuation of the work started in D29872 . Passing the carry down as a value rather than as a glue allows for further optimizations. Introducing setcccarry makes the use of addc/subc unecessary and we can start the removal process.
This patch only introduce the optimization strictly required to get the same level of optimization as was available before nothing more.
Reviewers: jyknight, nemanjai, mkuper, spatel, RKSimon, zvi, bkramer
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D33374
llvm-svn: 304404
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.h')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.h b/llvm/lib/Target/X86/X86ISelLowering.h index 18106c2eb39..a3d93d90a92 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.h +++ b/llvm/lib/Target/X86/X86ISelLowering.h @@ -1164,6 +1164,7 @@ namespace llvm { SelectionDAG &DAG) const; SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSETCCE(SDValue Op, SelectionDAG &DAG) const; + SDValue LowerSETCCCARRY(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const; SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const; SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const; |
