Jump table JIT support. Work in progress.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58836 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMJITInfo.h b/lib/Target/ARM/ARMJITInfo.h
index 2a3a7f8..4b94f3e 100644
--- a/lib/Target/ARM/ARMJITInfo.h
+++ b/lib/Target/ARM/ARMJITInfo.h
@@ -16,6 +16,8 @@
#include "llvm/Target/TargetJITInfo.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
@@ -31,7 +33,11 @@
// ConstPoolId2AddrMap - A map from constant pool ids to the corresponding
// CONSTPOOL_ENTRY addresses.
- SmallVector<intptr_t, 32> ConstPoolId2AddrMap;
+ SmallVector<intptr_t, 16> ConstPoolId2AddrMap;
+
+ // JumpTableId2AddrMap - A map from inline jumptable ids to the
+ // corresponding inline jump table bases.
+ SmallVector<intptr_t, 16> JumpTableId2AddrMap;
// PCLabelMap - A map from PC labels to addresses.
DenseMap<unsigned, intptr_t> PCLabelMap;
@@ -65,6 +71,10 @@
/// pool address resolution is handled by the target.
virtual bool hasCustomConstantPool() const { return true; }
+ /// hasCustomJumpTables - Allows a target to specify that jumptables
+ /// are emitted by the target.
+ virtual bool hasCustomJumpTables() const { return true; }
+
/// allocateSeparateGVMemory - If true, globals should be placed in
/// separately allocated heap memory rather than in the same
/// code memory allocated by MachineCodeEmitter.
@@ -78,20 +88,21 @@
/// Initialize - Initialize internal stage. Get the list of constant pool
/// Resize constant pool ids to CONSTPOOL_ENTRY addresses map.
- void Initialize(const std::vector<MachineConstantPoolEntry> *mcpes) {
- MCPEs = mcpes;
+ void Initialize(const MachineFunction &MF) {
+ MCPEs = &MF.getConstantPool()->getConstants();
ConstPoolId2AddrMap.resize(MCPEs->size());
+ JumpTableId2AddrMap.resize(MF.getJumpTableInfo()->getJumpTables().size());
}
/// getConstantPoolEntryAddr - The ARM target puts all constant
- /// pool entries into constant islands. Resolve the constant pool index
- /// into the address where the constant is stored.
+ /// pool entries into constant islands. This returns the address of the
+ /// constant pool entry of the specified index.
intptr_t getConstantPoolEntryAddr(unsigned CPI) const {
assert(CPI < ConstPoolId2AddrMap.size());
return ConstPoolId2AddrMap[CPI];
}
- /// addConstantPoolEntryAddr - Map a Constant Pool Index (CPI) to the address
+ /// addConstantPoolEntryAddr - Map a Constant Pool Index to the address
/// where its associated value is stored. When relocations are processed,
/// this value will be used to resolve references to the constant.
void addConstantPoolEntryAddr(unsigned CPI, intptr_t Addr) {
@@ -99,6 +110,23 @@
ConstPoolId2AddrMap[CPI] = Addr;
}
+ /// getJumpTableBaseAddr - The ARM target inline all jump tables within
+ /// text section of the function. This returns the address of the base of
+ /// the jump table of the specified index.
+ intptr_t getJumpTableBaseAddr(unsigned JTI) const {
+ assert(JTI < JumpTableId2AddrMap.size());
+ return JumpTableId2AddrMap[JTI];
+ }
+
+ /// addJumpTableBaseAddr - Map a jump table index to the address where
+ /// the corresponding inline jump table is emitted. When relocations are
+ /// processed, this value will be used to resolve references to the
+ /// jump table.
+ void addJumpTableBaseAddr(unsigned JTI, intptr_t Addr) {
+ assert(JTI < JumpTableId2AddrMap.size());
+ JumpTableId2AddrMap[JTI] = Addr;
+ }
+
/// getPCLabelAddr - Retrieve the address of the PC label of the specified id.
intptr_t getPCLabelAddr(unsigned Id) const {
DenseMap<unsigned, intptr_t>::const_iterator I = PCLabelMap.find(Id);
@@ -112,10 +140,10 @@
}
private:
- /// resolveRelocationAddr - Resolve the resulting address of the relocation
+ /// resolveRelocDestAddr - Resolve the resulting address of the relocation
/// if it's not already solved. Constantpool entries must be resolved by
/// ARM target.
- intptr_t resolveRelocationAddr(MachineRelocation *MR) const;
+ intptr_t resolveRelocDestAddr(MachineRelocation *MR) const;
};
}