From b9edad0163296e02f7b4dbbc22b50615dede357c Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Thu, 15 Sep 2011 21:06:00 +0000 Subject: [PATCH] Add an option to disable spill hoisting. When -split-spill-mode is enabled, spill hoisting is performed by SplitKit instead of by InlineSpiller. This hidden command line option is for testing the splitter spill mode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139845 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/InlineSpiller.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp index 169a867aa7a..01fe84030e3 100644 --- a/lib/CodeGen/InlineSpiller.cpp +++ b/lib/CodeGen/InlineSpiller.cpp @@ -28,6 +28,7 @@ #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetInstrInfo.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" @@ -45,6 +46,9 @@ STATISTIC(NumRemats, "Number of rematerialized defs for spilling"); STATISTIC(NumOmitReloadSpill, "Number of omitted spills of reloads"); STATISTIC(NumHoists, "Number of hoisted spills"); +static cl::opt DisableHoisting("disable-spill-hoist", cl::Hidden, + cl::desc("Disable inline spill hoisting")); + namespace { class InlineSpiller : public Spiller { MachineFunctionPass &Pass; @@ -367,7 +371,7 @@ void InlineSpiller::propagateSiblingValue(SibValueMap::iterator SVI, // Should this value be propagated as a preferred spill candidate? We don't // propagate values of registers that are about to spill. - bool PropSpill = !isRegToSpill(SV.SpillReg); + bool PropSpill = !DisableHoisting && !isRegToSpill(SV.SpillReg); unsigned SpillDepth = ~0u; for (TinyPtrVector::iterator DepI = Deps->begin(), -- 2.34.1