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ScopDetection: Allow to limit the scop detection to a single function 

-polly-detect-only=<functionname> allows to limit the scop detection to
a single function.

llvm-svn: 142750
This commit is contained in:
Tobias Grosser 2011-10-23 11:17:06 +00:00
parent f3fbcb8919
commit 2ff8723d5d
3 changed files with 149 additions and 2 deletions
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12
polly/lib/Analysis/ScopDetection.cpp
View File

@ -63,6 +63,13 @@
using namespace llvm;
using namespace polly;
static cl::opt<std::string>
OnlyFunction("polly-detect-only",
cl::desc("Only detect scops in function"), cl::Hidden,
cl::value_desc("The function name to detect scops in"),
cl::ValueRequired, cl::init(""));
//===----------------------------------------------------------------------===//
// Statistics.
@ -553,6 +560,11 @@ bool ScopDetection::runOnFunction(llvm::Function &F) {
RI = &getAnalysis<RegionInfo>();
Region *TopRegion = RI->getTopLevelRegion();
releaseMemory();
if (OnlyFunction != "" && F.getNameStr() != OnlyFunction)
return false;
if(!isValidFunction(F))
return false;

122
polly/test/ScopDetection/single_function_only.ll Normal file
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@ -0,0 +1,122 @@
; RUN: opt %loadPolly %defaultOpts -polly-cloog -analyze -polly-detect-only=bar %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
define i32 @foo() nounwind {
entry:
%A = alloca [1024 x i32], align 4 ; <[1024 x i32]*> [#uses=3]
%arraydecay = getelementptr inbounds [1024 x i32]* %A, i32 0, i32 0 ; <i32*> [#uses=1]
%conv = bitcast i32* %arraydecay to i8* ; <i8*> [#uses=1]
call void @llvm.memset.p0i8.i64(i8* %conv, i8 0, i64 4096, i32 1, i1 false)
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvar1 = phi i64 [ %indvar.next2, %for.inc ], [ 0, %entry ] ; <i64> [#uses=3]
%arrayidx = getelementptr [1024 x i32]* %A, i64 0, i64 %indvar1 ; <i32*> [#uses=1]
%exitcond = icmp ne i64 %indvar1, 1024 ; <i1> [#uses=1]
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
store i32 1, i32* %arrayidx
br label %for.inc
for.inc: ; preds = %for.body
%indvar.next2 = add i64 %indvar1, 1 ; <i64> [#uses=1]
br label %for.cond
for.end: ; preds = %for.cond
br label %for.cond5
for.cond5: ; preds = %for.inc17, %for.end
%indvar = phi i64 [ %indvar.next, %for.inc17 ], [ 0, %for.end ] ; <i64> [#uses=3]
%arrayidx13 = getelementptr [1024 x i32]* %A, i64 0, i64 %indvar ; <i32*> [#uses=1]
%i.1 = trunc i64 %indvar to i32 ; <i32> [#uses=1]
%cmp7 = icmp slt i32 %i.1, 1024 ; <i1> [#uses=1]
br i1 %cmp7, label %for.body9, label %for.end20
for.body9: ; preds = %for.cond5
%tmp14 = load i32* %arrayidx13 ; <i32> [#uses=1]
%cmp15 = icmp ne i32 %tmp14, 1 ; <i1> [#uses=1]
br i1 %cmp15, label %if.then, label %if.end
if.then: ; preds = %for.body9
br label %return
if.end: ; preds = %for.body9
br label %for.inc17
for.inc17: ; preds = %if.end
%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
br label %for.cond5
for.end20: ; preds = %for.cond5
br label %return
return: ; preds = %for.end20, %if.then
%retval.0 = phi i32 [ 1, %if.then ], [ 0, %for.end20 ] ; <i32> [#uses=1]
ret i32 %retval.0
}
define i32 @bar() nounwind {
entry:
%A = alloca [1024 x i32], align 4 ; <[1024 x i32]*> [#uses=3]
%arraydecay = getelementptr inbounds [1024 x i32]* %A, i32 0, i32 0 ; <i32*> [#uses=1]
%conv = bitcast i32* %arraydecay to i8* ; <i8*> [#uses=1]
call void @llvm.memset.p0i8.i64(i8* %conv, i8 0, i64 4096, i32 1, i1 false)
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvar1 = phi i64 [ %indvar.next2, %for.inc ], [ 0, %entry ] ; <i64> [#uses=3]
%arrayidx = getelementptr [1024 x i32]* %A, i64 0, i64 %indvar1 ; <i32*> [#uses=1]
%exitcond = icmp ne i64 %indvar1, 1024 ; <i1> [#uses=1]
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
store i32 1, i32* %arrayidx
br label %for.inc
for.inc: ; preds = %for.body
%indvar.next2 = add i64 %indvar1, 1 ; <i64> [#uses=1]
br label %for.cond
for.end: ; preds = %for.cond
br label %for.cond5
for.cond5: ; preds = %for.inc17, %for.end
%indvar = phi i64 [ %indvar.next, %for.inc17 ], [ 0, %for.end ] ; <i64> [#uses=3]
%arrayidx13 = getelementptr [1024 x i32]* %A, i64 0, i64 %indvar ; <i32*> [#uses=1]
%i.1 = trunc i64 %indvar to i32 ; <i32> [#uses=1]
%cmp7 = icmp slt i32 %i.1, 1024 ; <i1> [#uses=1]
br i1 %cmp7, label %for.body9, label %for.end20
for.body9: ; preds = %for.cond5
%tmp14 = load i32* %arrayidx13 ; <i32> [#uses=1]
%cmp15 = icmp ne i32 %tmp14, 1 ; <i1> [#uses=1]
br i1 %cmp15, label %if.then, label %if.end
if.then: ; preds = %for.body9
br label %return
if.end: ; preds = %for.body9
br label %for.inc17
for.inc17: ; preds = %if.end
%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
br label %for.cond5
for.end20: ; preds = %for.cond5
br label %return
return: ; preds = %for.end20, %if.then
%retval.0 = phi i32 [ 1, %if.then ], [ 0, %for.end20 ] ; <i32> [#uses=1]
ret i32 %retval.0
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
; CHECK-NOT: foo()
; CHECK:bar()
; CHECK:for (c2=0;c2<=1023;c2++) {
; CHECK: Stmt_for_body(c2);
; CHECK:}

17
polly/www/example_load_Polly_into_clang.html
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@ -20,7 +20,7 @@ that Polly is a young research project. It is expected to crash, produce
invalid code or to hang in complex calculations even for simple examples. In
case you see such a problem, please check the <a href="bugs.html">Bug
database</a> and consider reporting the bug.
<h4>Compiling code with Polly</h4>
<h2>Compiling code with Polly</h2>
To compile code with Polly you only need to add '-load
${POLLY_BUILD_DIR}/lib/LLVMPolly.so' to your command line or your CFLAGS and
@ -28,12 +28,25 @@ Polly is automatically executed at -O3.
<pre class="code">clang -load ${POLLY_BUILD_DIR}/lib/LLVMPolly.so -O3 file.c</pre>
<h4>Automatic OpenMP code generation</h4>
<h2>Automatic OpenMP code generation</h2>
To automatically detect parallel loops and generate OpenMP code for them you
also need to add '-mllvm -enable-polly-openmp -lgomp' to your CFLAGS.
<pre class="code">clang -load ${POLLY_BUILD_DIR}/lib/LLVMPolly.so -O3 -mllvm -enable-polly-openmp -lgomp file.c</pre>
<h2>Further options</h2>
Polly supports further options that are mainly useful for the development or
the
analysis of Polly. The relevant options can be
added to clang by appending '-mllvm -option-name' to the CFLAGS or the clang
command line.
<h3>Limit Polly to a single function</h3>
To limit the execution of Polly to a single function, use the option
'-polly-detect-only=functionname'.
</div>
</body>
</html>