From fb8075d03f5c87bd57dcc9c5f2304f6b13c55aad Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Thu, 28 Feb 2008 00:43:03 +0000 Subject: Add a quick and dirty "loop aligner pass". x86 uses it to align its loops to 16-byte boundaries. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47703 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86TargetMachine.cpp | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'lib/Target/X86/X86TargetMachine.cpp') diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp index 850eb386fb..ad2775a648 100644 --- a/lib/Target/X86/X86TargetMachine.cpp +++ b/lib/Target/X86/X86TargetMachine.cpp @@ -164,6 +164,13 @@ bool X86TargetMachine::addPostRegAlloc(FunctionPassManager &PM, bool Fast) { return true; // -print-machineinstr should print after this. } +bool X86TargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) { + if (Fast) return false; + + PM.add(createLoopAlignerPass()); + return true; +} + bool X86TargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast, std::ostream &Out) { PM.add(createX86CodePrinterPass(Out, *this)); -- cgit v1.2.3