diff options
Diffstat (limited to 'compiler/dex/mir_graph.h')
| -rw-r--r-- | compiler/dex/mir_graph.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/compiler/dex/mir_graph.h b/compiler/dex/mir_graph.h index dbe9062..23b7c42 100644 --- a/compiler/dex/mir_graph.h +++ b/compiler/dex/mir_graph.h @@ -173,7 +173,17 @@ enum OatMethodAttributes { typedef uint16_t BasicBlockId; static const BasicBlockId NullBasicBlockId = 0; -static constexpr bool kLeafOptimization = false; + +// Leaf optimization is basically the removal of suspend checks from leaf methods. +// This is incompatible with SuspendCheckElimination (SCE) which eliminates suspend +// checks from loops that call any non-intrinsic method, since a loop that calls +// only a leaf method would end up without any suspend checks at all. So turning +// this on automatically disables the SCE in MIRGraph::EliminateSuspendChecksGate(). +// +// Since the Optimizing compiler is actually applying the same optimization, Quick +// must not run SCE anyway, so we enable this optimization as a way to disable SCE +// while keeping a consistent behavior across the backends, b/22657404. +static constexpr bool kLeafOptimization = true; /* * In general, vreg/sreg describe Dalvik registers that originated with dx. However, |