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| author | Vladimir Marko <vmarko@google.com> | 2015-03-18 11:33:58 +0000 |
|---|---|---|
| committer | Vladimir Marko <vmarko@google.com> | 2015-03-18 14:50:07 +0000 |
| commit | 22fe45de11ed7afdf21400d2de3abd23f3a62800 (patch) | |
| tree | 47eb3fa0dba432667774eb1d0eb9f66b897a66d3 /compiler/dex/mir_graph.h | |
| parent | d6f00810e2419489f526e4f0c94cb13318a365fd (diff) | |
| download | android_art-22fe45de11ed7afdf21400d2de3abd23f3a62800.tar.gz android_art-22fe45de11ed7afdf21400d2de3abd23f3a62800.tar.bz2 android_art-22fe45de11ed7afdf21400d2de3abd23f3a62800.zip | |
Quick: Eliminate check-cast guaranteed by instance-of.
Eliminate check-cast if the result of an instance-of with
the very same type on the same value is used to branch to
the check-cast's block or a dominator of it.
Note that there already exists a verifier-based elimination
of check-cast but it excludes check-cast on interfaces. This
new optimization works for interface types and, since it's
GVN-based, it can better recognize when the same reference
is used for instance-of and check-cast.
Change-Id: Ib315199805099d1cb0534bb4a90dc51baa409685
Diffstat (limited to 'compiler/dex/mir_graph.h')
| -rw-r--r-- | compiler/dex/mir_graph.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/dex/mir_graph.h b/compiler/dex/mir_graph.h index 9da39d151c..3298af1162 100644 --- a/compiler/dex/mir_graph.h +++ b/compiler/dex/mir_graph.h @@ -150,6 +150,7 @@ enum OatMethodAttributes { #define MIR_IGNORE_NULL_CHECK (1 << kMIRIgnoreNullCheck) #define MIR_IGNORE_RANGE_CHECK (1 << kMIRIgnoreRangeCheck) +#define MIR_IGNORE_CHECK_CAST (1 << kMIRIgnoreCheckCast) #define MIR_STORE_NON_NULL_VALUE (1 << kMIRStoreNonNullValue) #define MIR_CLASS_IS_INITIALIZED (1 << kMIRClassIsInitialized) #define MIR_CLASS_IS_IN_DEX_CACHE (1 << kMIRClassIsInDexCache) |