- Refactor the code that resolve basic block references to a TargetJITInfo
method.
- Added synchronizeICache() to TargetJITInfo. It is called after each block
of code is emitted to flush the icache. This ensures correct execution
on targets that have separate dcache and icache.
- Added PPC / Mac OS X specific code to do icache flushing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29276 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCJITInfo.cpp b/lib/Target/PowerPC/PPCJITInfo.cpp
index 1d4760a..0c6044c 100644
--- a/lib/Target/PowerPC/PPCJITInfo.cpp
+++ b/lib/Target/PowerPC/PPCJITInfo.cpp
@@ -16,7 +16,9 @@
#include "PPCRelocations.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/Config/alloca.h"
+#include "llvm/Support/Debug.h"
#include <set>
+#include <iostream>
using namespace llvm;
static TargetJITInfo::JITCompilerFn JITCompilerFunction;
@@ -243,3 +245,36 @@
void PPCJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
EmitBranchToAt(Old, New, false);
}
+
+void PPCJITInfo::resolveBBRefs(MachineCodeEmitter &MCE) {
+ // Resolve branches to BasicBlocks for the entire function
+ for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
+ intptr_t Location = MCE.getMachineBasicBlockAddress(BBRefs[i].first);
+ unsigned *Ref = (unsigned *)BBRefs[i].second;
+ DEBUG(std::cerr << "Fixup @ " << (void*)Ref << " to " << (void*)Location
+ << "\n");
+ unsigned Instr = *Ref;
+ intptr_t BranchTargetDisp = (Location - (intptr_t)Ref) >> 2;
+
+ switch (Instr >> 26) {
+ default: assert(0 && "Unknown branch user!");
+ case 18: // This is B or BL
+ *Ref |= (BranchTargetDisp & ((1 << 24)-1)) << 2;
+ break;
+ case 16: // This is BLT,BLE,BEQ,BGE,BGT,BNE, or other bcx instruction
+ *Ref |= (BranchTargetDisp & ((1 << 14)-1)) << 2;
+ break;
+ }
+ }
+ BBRefs.clear();
+}
+
+#ifdef __APPLE__
+extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
+#endif
+
+void PPCJITInfo::synchronizeICache(const void *Addr, size_t Len) {
+#ifdef __APPLE__
+ sys_icache_invalidate(Addr, Len);
+#endif
+}