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Change the PassManagerBuilder (used by -O3) loop vectorizer flag from -vectorize to -vectorize-loops because we dont want to share the same flag as the bb-vectorizer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2012-10-29 16:36:25 +00:00
parent b9051db24a
commit d233b78760
3 changed files with 12 additions and 6 deletions
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3
docs/ReleaseNotes.html
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@ -468,9 +468,10 @@ Release Notes</a>.</h1>
<p> Loop Vectorizer - We've added a loop vectorizer and we are now able to
vectorize small loops. The loop vectorizer is disabled by default and
can be enabled using the <b>-mllvm -vectorize</b> flag.
can be enabled using the <b>-mllvm -vectorize-loops</b> flag.
The SIMD vector width can be specified using the flag
<b>-mllvm -force-vector-width=4</b>.
The defaule value is <b>0</b> which means auto-select.
<br/>
We can now vectorize this code:

3
include/llvm/Transforms/IPO/PassManagerBuilder.h
View File

@ -103,7 +103,8 @@ public:
bool DisableSimplifyLibCalls;
bool DisableUnitAtATime;
bool DisableUnrollLoops;
bool Vectorize;
bool BBVectorize;
bool LoopVectorize;
private:
/// ExtensionList - This is list of all of the extensions that are registered.

12
lib/Transforms/IPO/PassManagerBuilder.cpp
View File

@ -33,7 +33,10 @@
using namespace llvm;
static cl::opt<bool>
RunVectorization("vectorize", cl::desc("Run vectorization passes"));
RunLoopVectorization("vectorize-loops", cl::desc("Run the Loop vectorization passes"));
static cl::opt<bool>
RunBBVectorization("vectorize", cl::desc("Run the BB vectorization passes"));
static cl::opt<bool>
UseGVNAfterVectorization("use-gvn-after-vectorization",
@ -52,7 +55,8 @@ PassManagerBuilder::PassManagerBuilder() {
DisableSimplifyLibCalls = false;
DisableUnitAtATime = false;
DisableUnrollLoops = false;
Vectorize = RunVectorization;
BBVectorize = RunBBVectorization;
LoopVectorize = RunLoopVectorization;
}
PassManagerBuilder::~PassManagerBuilder() {
@ -185,7 +189,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
MPM.add(createLoopIdiomPass()); // Recognize idioms like memset.
MPM.add(createLoopDeletionPass()); // Delete dead loops
if (Vectorize) {
if (LoopVectorize) {
MPM.add(createLoopVectorizePass());
MPM.add(createLICMPass());
}
@ -208,7 +212,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
addExtensionsToPM(EP_ScalarOptimizerLate, MPM);
if (Vectorize) {
if (BBVectorize) {
MPM.add(createBBVectorizePass());
MPM.add(createInstructionCombiningPass());
if (OptLevel > 1 && UseGVNAfterVectorization)