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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-09-19 12:58:43 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-09-19 12:58:43 +0000 |
| commit | c65dd89804d35fbd6170b61a0d1494df0576d352 (patch) | |
| tree | 23afb2cb0e22463061583308301287e5dbd22bbf /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 13bdae8541c3fc5acf6ee7de78ec5ab8446848e4 (diff) | |
| download | bcm5719-llvm-c65dd89804d35fbd6170b61a0d1494df0576d352.tar.gz bcm5719-llvm-c65dd89804d35fbd6170b61a0d1494df0576d352.zip | |
[DAG] Add SelectionDAG::MaxRecursionDepth constant
As commented on D67557 we have a lot of uses of depth checks all using magic numbers.
This patch adds the SelectionDAG::MaxRecursionDepth constant and moves over some general cases to use this explicitly.
Differential Revision: https://reviews.llvm.org/D67711
llvm-svn: 372315
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 96884bad54a..95b7fe2e1c6 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2422,7 +2422,7 @@ KnownBits SelectionDAG::computeKnownBits(SDValue Op, const APInt &DemandedElts, return Known; } - if (Depth >= 6) + if (Depth >= MaxRecursionDepth) return Known; // Limit search depth. KnownBits Known2; @@ -3412,7 +3412,7 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, const APInt &DemandedElts, return Val.getNumSignBits(); } - if (Depth >= 6) + if (Depth >= MaxRecursionDepth) return 1; // Limit search depth. if (!DemandedElts) @@ -3973,7 +3973,7 @@ bool SelectionDAG::isKnownNeverNaN(SDValue Op, bool SNaN, unsigned Depth) const if (getTarget().Options.NoNaNsFPMath || Op->getFlags().hasNoNaNs()) return true; - if (Depth >= 6) + if (Depth >= MaxRecursionDepth) return false; // Limit search depth. // TODO: Handle vectors. |
