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author | Tom Stellard <thomas.stellard@amd.com> | 2013-07-27 00:01:07 +0000 |
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committer | Tom Stellard <thomas.stellard@amd.com> | 2013-07-27 00:01:07 +0000 |
commit | 57e6b2d1f3de0bf459e96f7038e692d624f7e580 (patch) | |
tree | 42204d51445bcb178a24fa07fe9da2d1d22818ff /lib/Transforms/IPO/PassManagerBuilder.cpp | |
parent | 018696db4587dc6a0d8081d0627543f5c08b6c97 (diff) | |
download | llvm-57e6b2d1f3de0bf459e96f7038e692d624f7e580.tar.gz llvm-57e6b2d1f3de0bf459e96f7038e692d624f7e580.tar.bz2 llvm-57e6b2d1f3de0bf459e96f7038e692d624f7e580.tar.xz |
SimplifyCFG: Use parallel-and and parallel-or mode to consolidate branch conditions
Merge consecutive if-regions if they contain identical statements.
Both transformations reduce number of branches. The transformation
is guarded by a target-hook, and is currently enabled only for +R600,
but the correctness has been tested on X86 target using a variety of
CPU benchmarks.
Patch by: Mei Ye
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187278 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/IPO/PassManagerBuilder.cpp')
-rw-r--r-- | lib/Transforms/IPO/PassManagerBuilder.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp index 1917cc81dd..6355204a03 100644 --- a/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -235,7 +235,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) { } MPM.add(createAggressiveDCEPass()); // Delete dead instructions - MPM.add(createCFGSimplificationPass()); // Merge & remove BBs + MPM.add(createCFGSimplificationPass(true)); // Merge & remove BBs MPM.add(createInstructionCombiningPass()); // Clean up after everything. // As an experimental mode, run any vectorization passes in a separate @@ -371,7 +371,7 @@ void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM, PM.add(createJumpThreadingPass()); // Delete basic blocks, which optimization passes may have killed. - PM.add(createCFGSimplificationPass()); + PM.add(createCFGSimplificationPass(true)); // Now that we have optimized the program, discard unreachable functions. PM.add(createGlobalDCEPass()); |