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author | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-06 11:46:36 -0700 |
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committer | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-18 10:52:30 -0700 |
commit | 2c3e0051c31c3f5b2328b447eadf1cf9c4427442 (patch) | |
tree | c0104029af14e9f47c2ef58ca60e6137691f3c9b /include/llvm/Analysis/TargetTransformInfo.h | |
parent | e1bc145815f4334641be19f1c45ecf85d25b6e5a (diff) | |
download | external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.zip external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.gz external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.bz2 |
Update aosp/master LLVM for rebase to r235153
Change-Id: I9bf53792f9fc30570e81a8d80d296c681d005ea7
(cherry picked from commit 0c7f116bb6950ef819323d855415b2f2b0aad987)
Diffstat (limited to 'include/llvm/Analysis/TargetTransformInfo.h')
-rw-r--r-- | include/llvm/Analysis/TargetTransformInfo.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/llvm/Analysis/TargetTransformInfo.h b/include/llvm/Analysis/TargetTransformInfo.h index fdb2010..f4195fb 100644 --- a/include/llvm/Analysis/TargetTransformInfo.h +++ b/include/llvm/Analysis/TargetTransformInfo.h @@ -190,12 +190,21 @@ public: /// comments for a detailed explanation of the cost values. unsigned getUserCost(const User *U) const; - /// \brief hasBranchDivergence - Return true if branch divergence exists. + /// \brief Return true if branch divergence exists. + /// /// Branch divergence has a significantly negative impact on GPU performance /// when threads in the same wavefront take different paths due to conditional /// branches. bool hasBranchDivergence() const; + /// \brief Returns whether V is a source of divergence. + /// + /// This function provides the target-dependent information for + /// the target-independent DivergenceAnalysis. DivergenceAnalysis first + /// builds the dependency graph, and then runs the reachability algorithm + /// starting with the sources of divergence. + bool isSourceOfDivergence(const Value *V) const; + /// \brief Test whether calls to a function lower to actual program function /// calls. /// @@ -252,6 +261,9 @@ public: /// loop body even when the number of loop iterations is not known at /// compile time). bool Runtime; + /// Allow emitting expensive instructions (such as divisions) when computing + /// the trip count of a loop for runtime unrolling. + bool AllowExpensiveTripCount; }; /// \brief Get target-customized preferences for the generic loop unrolling @@ -520,6 +532,7 @@ public: ArrayRef<const Value *> Arguments) = 0; virtual unsigned getUserCost(const User *U) = 0; virtual bool hasBranchDivergence() = 0; + virtual bool isSourceOfDivergence(const Value *V) = 0; virtual bool isLoweredToCall(const Function *F) = 0; virtual void getUnrollingPreferences(Loop *L, UnrollingPreferences &UP) = 0; virtual bool isLegalAddImmediate(int64_t Imm) = 0; @@ -619,6 +632,9 @@ public: } unsigned getUserCost(const User *U) override { return Impl.getUserCost(U); } bool hasBranchDivergence() override { return Impl.hasBranchDivergence(); } + bool isSourceOfDivergence(const Value *V) override { + return Impl.isSourceOfDivergence(V); + } bool isLoweredToCall(const Function *F) override { return Impl.isLoweredToCall(F); } |