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add a new "llvm-dis -show-annotations" option, which causes it to print

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#uses comments, with a testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112906 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-09-02 23:21:44 +00:00
parent 1dbb3879e8
commit 6cd71f0c40
2 changed files with 51 additions and 1 deletions
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20
test/Assembler/comment.ll Normal file
View File

@ -0,0 +1,20 @@
; RUN: llvm-as < %s | llvm-dis -show-annotations | FileCheck -check-prefix=ANNOT %s
; RUN: llvm-as < %s | llvm-dis | FileCheck -check-prefix=BARE %s
; The bare version of this file should not have any #uses lines.
; BARE: @B =
; BARE-NOT: #uses
; BARE: }
@B = external global i32
; ANNOT: @B = external global i32 ; [#uses=0]
define <4 x i1> @foo(<4 x float> %a, <4 x float> %b) nounwind {
entry:
%cmp = fcmp olt <4 x float> %a, %b ; [#uses=1]
ret <4 x i1> %cmp
}
; ANNOT: %cmp = fcmp olt <4 x float> %a, %b ; [#uses=1]

32
tools/llvm-dis/llvm-dis.cpp
View File

@ -18,8 +18,11 @@
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Assembly/AssemblyAnnotationWriter.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
@ -40,6 +43,29 @@ Force("f", cl::desc("Enable binary output on terminals"));
static cl::opt<bool>
DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
static cl::opt<bool>
ShowAnnotations("show-annotations",
cl::desc("Add informational comments to the .ll file"));
namespace {
class CommentWriter : public AssemblyAnnotationWriter {
public:
void emitFunctionAnnot(const Function *F,
formatted_raw_ostream &OS) {
OS << "; [#uses=" << F->getNumUses() << ']'; // Output # uses
OS << '\n';
}
void printInfoComment(const Value &V, formatted_raw_ostream &OS) {
if (V.getType()->isVoidTy()) return;
OS.PadToColumn(50);
OS << "; [#uses=" << V.getNumUses() << ']'; // Output # uses
}
};
} // end anon namespace
int main(int argc, char **argv) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
@ -96,9 +122,13 @@ int main(int argc, char **argv) {
return 1;
}
OwningPtr<AssemblyAnnotationWriter> Annotator;
if (ShowAnnotations)
Annotator.reset(new CommentWriter());
// All that llvm-dis does is write the assembly to a file.
if (!DontPrint)
Out->os() << *M;
M->print(Out->os(), Annotator.get());
// Declare success.
Out->keep();