switches use the binary search algorithm) for
environments that don't support it. PPC64 JIT
is such an environment; turn the flag on for that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54248
91177308-0d34-0410-b5e6-
96231b3b80d8
/// VerboseAsm - When this flag is set, the asm printer prints additional
/// comments to asm directives.
extern bool VerboseAsm;
+
+ /// DisableJumpTables - This flag indicates jump tables should not be
+ /// generated.
+ extern bool DisableJumpTables;
} // End llvm namespace
#endif
}
static inline bool areJTsAllowed(const TargetLowering &TLI) {
- return (TLI.isOperationLegal(ISD::BR_JT, MVT::Other) ||
- TLI.isOperationLegal(ISD::BRIND, MVT::Other));
+ return !DisableJumpTables &&
+ (TLI.isOperationLegal(ISD::BR_JT, MVT::Other) ||
+ TLI.isOperationLegal(ISD::BRIND, MVT::Other));
}
/// handleJTSwitchCase - Emit jumptable for current switch case range
: TargetLowering(TM), PPCSubTarget(*TM.getSubtargetImpl()) {
setPow2DivIsCheap();
-
+
// Use _setjmp/_longjmp instead of setjmp/longjmp.
setUseUnderscoreSetJmp(true);
setUseUnderscoreLongJmp(true);
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
// Register the targets
// instructions to materialize arbitrary global variable + function +
// constant pool addresses.
setRelocationModel(Reloc::PIC_);
+ // Temporary workaround for the inability of PPC64 JIT to handle jump
+ // tables.
+ DisableJumpTables = true;
} else {
setRelocationModel(Reloc::Static);
}
unsigned StackAlignment;
bool RealignStack;
bool VerboseAsm;
+ bool DisableJumpTables;
}
static cl::opt<bool, true> PrintCode("print-machineinstrs",
cl::location(VerboseAsm),
cl::init(false));
+static cl::opt<bool, true>
+DisableSwitchTables(cl::Hidden, "disable-jump-tables",
+ cl::desc("Do not generate jump tables."),
+ cl::location(DisableJumpTables),
+ cl::init(false));
//---------------------------------------------------------------------------
// TargetMachine Class