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| author | Michael Kruse <llvm-project@meinersbur.de> | 2022-05-06 02:43:49 -0500 |
|---|---|---|
| committer | Michael Kruse <llvm-project@meinersbur.de> | 2022-05-06 02:43:49 -0500 |
| commit | d3460d2a890ccb4ee84ffd05d4a722ff82b5170d (patch) | |
| tree | 19c511c63d14da385bc907b4aa99276b8636dc1a /llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | |
| parent | fdb6ddcfeb62be7dbc502a4a4ed7c5be11c1c9b6 (diff) | |
| parent | 9c1085c7e20bdd7c4a487f50313ebeeb2b6683b8 (diff) | |
| download | llvm-users/meinersbur/irbuilder-ompregion.zip llvm-users/meinersbur/irbuilder-ompregion.tar.gz llvm-users/meinersbur/irbuilder-ompregion.tar.bz2 | |
Merge branch 'main' into irbuilder-ompregionusers/meinersbur/irbuilder-ompregion
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 9732a17..b209aecf 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -9044,7 +9044,9 @@ void TargetLowering::expandUADDSUBO( if (IsAdd && isOneConstant(RHS)) { // Special case: uaddo X, 1 overflowed if X+1 is 0. This potential reduces // the live range of X. We assume comparing with 0 is cheap. - // TODO: This generalizes to (X + C) < C. + // The general case (X + C) < C is not necessarily beneficial. Although we + // reduce the live range of X, we may introduce the materialization of + // constant C. SetCC = DAG.getSetCC(dl, SetCCType, Result, DAG.getConstant(0, dl, Node->getValueType(0)), ISD::SETEQ); |