[llvm-commits] [llvm] r125965 - in /llvm/trunk: include/llvm/InitializePasses.h include/llvm/Target/TargetLibraryInfo.h lib/Target/CMakeLists.txt lib/Target/Target.cpp lib/Target/TargetLibraryInfo.cpp
Chris Lattner
sabre at nondot.org
Fri Feb 18 13:50:34 PST 2011
Author: lattner
Date: Fri Feb 18 15:50:34 2011
New Revision: 125965
URL: http://llvm.org/viewvc/llvm-project?rev=125965&view=rev
Log:
introduce a new TargetLibraryInfo pass, which transformations can use to
query about available library functions. For now this just has
memset_pattern16, which exists on darwin, but it can be extended for a
bunch of other things in the future.
Added:
llvm/trunk/include/llvm/Target/TargetLibraryInfo.h
llvm/trunk/lib/Target/TargetLibraryInfo.cpp
Modified:
llvm/trunk/include/llvm/InitializePasses.h
llvm/trunk/lib/Target/CMakeLists.txt
llvm/trunk/lib/Target/Target.cpp
Modified: llvm/trunk/include/llvm/InitializePasses.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/InitializePasses.h?rev=125965&r1=125964&r2=125965&view=diff
==============================================================================
--- llvm/trunk/include/llvm/InitializePasses.h (original)
+++ llvm/trunk/include/llvm/InitializePasses.h Fri Feb 18 15:50:34 2011
@@ -220,6 +220,7 @@
void initializeTailCallElimPass(PassRegistry&);
void initializeTailDupPass(PassRegistry&);
void initializeTargetDataPass(PassRegistry&);
+void initializeTargetLibraryInfoPass(PassRegistry&);
void initializeTwoAddressInstructionPassPass(PassRegistry&);
void initializeTypeBasedAliasAnalysisPass(PassRegistry&);
void initializeUnifyFunctionExitNodesPass(PassRegistry&);
Added: llvm/trunk/include/llvm/Target/TargetLibraryInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetLibraryInfo.h?rev=125965&view=auto
==============================================================================
--- llvm/trunk/include/llvm/Target/TargetLibraryInfo.h (added)
+++ llvm/trunk/include/llvm/Target/TargetLibraryInfo.h Fri Feb 18 15:50:34 2011
@@ -0,0 +1,56 @@
+//===-- llvm/Target/TargetLibraryInfo.h - Library information ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_TARGETLIBRARYINFO_H
+#define LLVM_TARGET_TARGETLIBRARYINFO_H
+
+#include "llvm/Pass.h"
+
+namespace llvm {
+ class Triple;
+
+ namespace LibFunc {
+ enum Func {
+ /// void memset_pattern16(void *b, const void *pattern16, size_t len);
+ memset_pattern16,
+
+ NumLibFuncs
+ };
+ }
+
+/// TargetLibraryInfo - This immutable pass captures information about what
+/// library functions are available for the current target, and allows a
+/// frontend to disable optimizations through -fno-builtin etc.
+class TargetLibraryInfo : public ImmutablePass {
+ unsigned char AvailableArray[(LibFunc::NumLibFuncs+7)/8];
+public:
+ static char ID;
+ TargetLibraryInfo();
+ TargetLibraryInfo(const Triple &T);
+
+ /// has - This function is used by optimizations that want to match on or form
+ /// a given library function.
+ bool has(LibFunc::Func F) const {
+ return (AvailableArray[F/8] & (1 << (F&7))) != 0;
+ }
+
+ /// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
+ /// ban use of specific library functions.
+ void setUnavailable(LibFunc::Func F) {
+ AvailableArray[F/8] &= ~(1 << (F&7));
+ }
+
+ void setAvailable(LibFunc::Func F) {
+ AvailableArray[F/8] |= 1 << (F&7);
+ }
+};
+
+} // end namespace llvm
+
+#endif
Modified: llvm/trunk/lib/Target/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CMakeLists.txt?rev=125965&r1=125964&r2=125965&view=diff
==============================================================================
--- llvm/trunk/lib/Target/CMakeLists.txt (original)
+++ llvm/trunk/lib/Target/CMakeLists.txt Fri Feb 18 15:50:34 2011
@@ -9,6 +9,7 @@
TargetFrameLowering.cpp
TargetInstrInfo.cpp
TargetIntrinsicInfo.cpp
+ TargetLibraryInfo.cpp
TargetLoweringObjectFile.cpp
TargetMachine.cpp
TargetRegisterInfo.cpp
Modified: llvm/trunk/lib/Target/Target.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Target.cpp?rev=125965&r1=125964&r2=125965&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Target.cpp (original)
+++ llvm/trunk/lib/Target/Target.cpp Fri Feb 18 15:50:34 2011
@@ -24,6 +24,7 @@
void llvm::initializeTarget(PassRegistry &Registry) {
initializeTargetDataPass(Registry);
+ initializeTargetLibraryInfoPass(Registry);
}
void LLVMInitializeTarget(LLVMPassRegistryRef R) {
Added: llvm/trunk/lib/Target/TargetLibraryInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/TargetLibraryInfo.cpp?rev=125965&view=auto
==============================================================================
--- llvm/trunk/lib/Target/TargetLibraryInfo.cpp (added)
+++ llvm/trunk/lib/Target/TargetLibraryInfo.cpp Fri Feb 18 15:50:34 2011
@@ -0,0 +1,49 @@
+//===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the TargetLibraryInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Target/TargetLibraryInfo.h"
+#include "llvm/ADT/Triple.h"
+using namespace llvm;
+
+// Register the default implementation.
+INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
+ "Target Library Information", false, true)
+char TargetLibraryInfo::ID = 0;
+
+/// initialize - Initialize the set of available library functions based on the
+/// specified target triple. This should be carefully written so that a missing
+/// target triple gets a sane set of defaults.
+static void initialize(TargetLibraryInfo &TLI, const Triple &T) {
+ initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
+
+
+ // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
+ if (T.getOS() != Triple::Darwin || T.getDarwinMajorNumber() < 9)
+ TLI.setUnavailable(LibFunc::memset_pattern16);
+
+}
+
+
+TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
+ // Default to everything being available.
+ memset(AvailableArray, -1, sizeof(AvailableArray));
+
+ initialize(*this, Triple());
+}
+
+TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
+ // Default to everything being available.
+ memset(AvailableArray, -1, sizeof(AvailableArray));
+
+ initialize(*this, T);
+}
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