From 1d09d56fe1e3f3faadd4bf4ccf3e585ddb3c3b07 Mon Sep 17 00:00:00 2001 From: Ulrich Weigand Date: Mon, 6 May 2013 16:15:19 +0000 Subject: [SystemZ] Add back end This adds the actual lib/Target/SystemZ target files necessary to implement the SystemZ target. Note that at this point, the target cannot yet be built since the configure bits are missing. Those will be provided shortly by a follow-on patch. This version of the patch incorporates feedback from reviews by Chris Lattner and Anton Korobeynikov. Thanks to all reviewers! Patch by Richard Sandiford. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181203 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/SystemZ/SystemZTargetMachine.cpp | 60 +++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 lib/Target/SystemZ/SystemZTargetMachine.cpp (limited to 'lib/Target/SystemZ/SystemZTargetMachine.cpp') diff --git a/lib/Target/SystemZ/SystemZTargetMachine.cpp b/lib/Target/SystemZ/SystemZTargetMachine.cpp new file mode 100644 index 0000000..8c4c456 --- /dev/null +++ b/lib/Target/SystemZ/SystemZTargetMachine.cpp @@ -0,0 +1,60 @@ +//===-- SystemZTargetMachine.cpp - Define TargetMachine for SystemZ -------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "SystemZTargetMachine.h" +#include "llvm/CodeGen/Passes.h" +#include "llvm/Support/TargetRegistry.h" + +using namespace llvm; + +extern "C" void LLVMInitializeSystemZTarget() { + // Register the target. + RegisterTargetMachine X(TheSystemZTarget); +} + +SystemZTargetMachine::SystemZTargetMachine(const Target &T, StringRef TT, + StringRef CPU, StringRef FS, + const TargetOptions &Options, + Reloc::Model RM, + CodeModel::Model CM, + CodeGenOpt::Level OL) + : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), + Subtarget(TT, CPU, FS), + // Make sure that global data has at least 16 bits of alignment by default, + // so that we can refer to it using LARL. We don't have any special + // requirements for stack variables though. + DL("E-p:64:64:64-i1:8:16-i8:8:16-i16:16-i32:32-i64:64" + "-f32:32-f64:64-f128:64-a0:8:16-n32:64"), + InstrInfo(*this), TLInfo(*this), TSInfo(*this), + FrameLowering(*this, Subtarget) { +} + +namespace { +/// SystemZ Code Generator Pass Configuration Options. +class SystemZPassConfig : public TargetPassConfig { +public: + SystemZPassConfig(SystemZTargetMachine *TM, PassManagerBase &PM) + : TargetPassConfig(TM, PM) {} + + SystemZTargetMachine &getSystemZTargetMachine() const { + return getTM(); + } + + virtual bool addInstSelector(); +}; +} // end anonymous namespace + +bool SystemZPassConfig::addInstSelector() { + addPass(createSystemZISelDag(getSystemZTargetMachine(), getOptLevel())); + return false; +} + +TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) { + return new SystemZPassConfig(this, PM); +} -- cgit v1.1 From 4a971705bc6030dc2e4338b3cd5cffa2e0f88b7b Mon Sep 17 00:00:00 2001 From: Rafael Espindola Date: Mon, 13 May 2013 01:16:13 +0000 Subject: Remove the MachineMove class. It was just a less powerful and more confusing version of MCCFIInstruction. A side effect is that, since MCCFIInstruction uses dwarf register numbers, calls to getDwarfRegNum are pushed out, which should allow further simplifications. I left the MachineModuleInfo::addFrameMove interface unchanged since this patch was already fairly big. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181680 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/SystemZ/SystemZTargetMachine.cpp | 1 + 1 file changed, 1 insertion(+) (limited to 'lib/Target/SystemZ/SystemZTargetMachine.cpp') diff --git a/lib/Target/SystemZ/SystemZTargetMachine.cpp b/lib/Target/SystemZ/SystemZTargetMachine.cpp index 8c4c456..17450ee 100644 --- a/lib/Target/SystemZ/SystemZTargetMachine.cpp +++ b/lib/Target/SystemZ/SystemZTargetMachine.cpp @@ -33,6 +33,7 @@ SystemZTargetMachine::SystemZTargetMachine(const Target &T, StringRef TT, "-f32:32-f64:64-f128:64-a0:8:16-n32:64"), InstrInfo(*this), TLInfo(*this), TSInfo(*this), FrameLowering(*this, Subtarget) { + initAsmInfo(); } namespace { -- cgit v1.1 From 44b486ed78c60b50aa14d4eed92ee828d4d44293 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Mon, 20 May 2013 14:23:08 +0000 Subject: [SystemZ] Add long branch pass Before this change, the SystemZ backend would use BRCL for all branches and only consider shortening them to BRC when generating an object file. E.g. a branch on equal would use the JGE alias of BRCL in assembly output, but might be shortened to the JE alias of BRC in ELF output. This was a useful first step, but it had two problems: (1) The z assembler isn't traditionally supposed to perform branch shortening or branch relaxation. We followed this rule by not relaxing branches in assembler input, but that meant that generating assembly code and then assembling it would not produce the same result as going directly to object code; the former would give long branches everywhere, whereas the latter would use short branches where possible. (2) Other useful branches, like COMPARE AND BRANCH, do not have long forms. We would need to do something else before supporting them. (Although COMPARE AND BRANCH does not change the condition codes, the plan is to model COMPARE AND BRANCH as a CC-clobbering instruction during codegen, so that we can safely lower it to a separate compare and long branch where necessary. This is not a valid transformation for the assembler proper to make.) This patch therefore moves branch relaxation to a pre-emit pass. For now, calls are still shortened from BRASL to BRAS by the assembler, although this too is not really the traditional behaviour. The first test takes about 1.5s to run, and there are likely to be more tests in this vein once further branch types are added. The feeling on IRC was that 1.5s is a bit much for a single test, so I've restricted it to SystemZ hosts for now. The patch exposes (and fixes) some typos in the main CodeGen/SystemZ tests. A later patch will remove the {{g}}s from that directory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182274 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/SystemZ/SystemZTargetMachine.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'lib/Target/SystemZ/SystemZTargetMachine.cpp') diff --git a/lib/Target/SystemZ/SystemZTargetMachine.cpp b/lib/Target/SystemZ/SystemZTargetMachine.cpp index 17450ee..6e7540c 100644 --- a/lib/Target/SystemZ/SystemZTargetMachine.cpp +++ b/lib/Target/SystemZ/SystemZTargetMachine.cpp @@ -47,7 +47,8 @@ public: return getTM(); } - virtual bool addInstSelector(); + virtual bool addInstSelector() LLVM_OVERRIDE; + virtual bool addPreEmitPass() LLVM_OVERRIDE; }; } // end anonymous namespace @@ -56,6 +57,11 @@ bool SystemZPassConfig::addInstSelector() { return false; } +bool SystemZPassConfig::addPreEmitPass() { + addPass(createSystemZLongBranchPass(getSystemZTargetMachine())); + return true; +} + TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) { return new SystemZPassConfig(this, PM); } -- cgit v1.1