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
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index 850eb38..ad2775a 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -164,6 +164,13 @@
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));