From 7b8c2f8587763e0a8ce48f9b7b67287930129c8d Mon Sep 17 00:00:00 2001 From: Nicolas Geoffray Date: Fri, 11 Nov 2011 18:32:52 +0000 Subject: Add a custom safepoint method, in order for language implementers to decide which machine instruction gets to be a safepoint. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144399 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/CodeGen/GCStrategy.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/llvm/CodeGen/GCStrategy.h b/include/llvm/CodeGen/GCStrategy.h index cd760dba92..1cbd36abfb 100644 --- a/include/llvm/CodeGen/GCStrategy.h +++ b/include/llvm/CodeGen/GCStrategy.h @@ -37,6 +37,7 @@ #define LLVM_CODEGEN_GCSTRATEGY_H #include "llvm/CodeGen/GCMetadata.h" +#include "llvm/CodeGen/MachineFunction.h" #include "llvm/Support/Registry.h" #include @@ -68,6 +69,8 @@ namespace llvm { bool CustomReadBarriers; //< Default is to insert loads. bool CustomWriteBarriers; //< Default is to insert stores. bool CustomRoots; //< Default is to pass through to backend. + bool CustomSafePoints; //< Default is to use NeededSafePoints + // to find safe points. bool InitRoots; //< If set, roots are nulled during lowering. bool UsesMetadata; //< If set, backend must emit metadata tables. @@ -87,7 +90,9 @@ namespace llvm { /// needsSafePoitns - True if safe points of any kind are required. By // default, none are recorded. - bool needsSafePoints() const { return NeededSafePoints != 0; } + bool needsSafePoints() const { + return CustomSafePoints || NeededSafePoints != 0; + } /// needsSafePoint(Kind) - True if the given kind of safe point is // required. By default, none are recorded. @@ -109,6 +114,11 @@ namespace llvm { /// can generate a stack map. If true, then // performCustomLowering must delete them. bool customRoots() const { return CustomRoots; } + + /// customSafePoints - By default, the GC analysis will find safe + /// points according to NeededSafePoints. If true, + /// then findCustomSafePoints must create them. + bool customSafePoints() const { return CustomSafePoints; } /// initializeRoots - If set, gcroot intrinsics should initialize their // allocas to null before the first use. This is @@ -135,6 +145,7 @@ namespace llvm { /// which the LLVM IR can be modified. virtual bool initializeCustomLowering(Module &F); virtual bool performCustomLowering(Function &F); + virtual bool findCustomSafePoints(GCFunctionInfo& FI, MachineFunction& MF); }; } -- cgit v1.2.3