mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 19:12:56 +02:00
[MC][mips] Add MipsMCInstrAnalysis class and register it as MC instruction analyzer
The `MipsMCInstrAnalysis` class overrides the `evaluateBranch` method and calculates target addresses for branch and calls instructions. That allows llvm-objdump to print functions' names in branch instructions in the disassemble mode. Differential Revision: http://reviews.llvm.org/D18209 llvm-svn: 264309
This commit is contained in:
parent
d336a67dfe
commit
64d083c81a
@ -20,6 +20,7 @@
|
||||
#include "llvm/ADT/Triple.h"
|
||||
#include "llvm/MC/MCCodeGenInfo.h"
|
||||
#include "llvm/MC/MCELFStreamer.h"
|
||||
#include "llvm/MC/MCInstrAnalysis.h"
|
||||
#include "llvm/MC/MCInstrInfo.h"
|
||||
#include "llvm/MC/MCRegisterInfo.h"
|
||||
#include "llvm/MC/MCSubtargetInfo.h"
|
||||
@ -129,6 +130,38 @@ createMipsObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
|
||||
return new MipsTargetELFStreamer(S, STI);
|
||||
}
|
||||
|
||||
namespace {
|
||||
|
||||
class MipsMCInstrAnalysis : public MCInstrAnalysis {
|
||||
public:
|
||||
MipsMCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
|
||||
|
||||
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
|
||||
uint64_t &Target) const override {
|
||||
unsigned NumOps = Inst.getNumOperands();
|
||||
if (NumOps == 0)
|
||||
return false;
|
||||
switch (Info->get(Inst.getOpcode()).OpInfo[NumOps - 1].OperandType) {
|
||||
case MCOI::OPERAND_UNKNOWN:
|
||||
case MCOI::OPERAND_IMMEDIATE:
|
||||
// jal, bal ...
|
||||
Target = Inst.getOperand(NumOps - 1).getImm();
|
||||
return true;
|
||||
case MCOI::OPERAND_PCREL:
|
||||
// b, j, beq ...
|
||||
Target = Addr + Inst.getOperand(NumOps - 1).getImm();
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
static MCInstrAnalysis *createMipsMCInstrAnalysis(const MCInstrInfo *Info) {
|
||||
return new MipsMCInstrAnalysis(Info);
|
||||
}
|
||||
|
||||
extern "C" void LLVMInitializeMipsTargetMC() {
|
||||
for (Target *T : {&TheMipsTarget, &TheMipselTarget, &TheMips64Target,
|
||||
&TheMips64elTarget}) {
|
||||
@ -156,6 +189,9 @@ extern "C" void LLVMInitializeMipsTargetMC() {
|
||||
// Register the MC subtarget info.
|
||||
TargetRegistry::RegisterMCSubtargetInfo(*T, createMipsMCSubtargetInfo);
|
||||
|
||||
// Register the MC instruction analyzer.
|
||||
TargetRegistry::RegisterMCInstrAnalysis(*T, createMipsMCInstrAnalysis);
|
||||
|
||||
// Register the MCInstPrinter.
|
||||
TargetRegistry::RegisterMCInstPrinter(*T, createMipsMCInstPrinter);
|
||||
|
||||
|
36
test/MC/Mips/instr-analysis.s
Normal file
36
test/MC/Mips/instr-analysis.s
Normal file
@ -0,0 +1,36 @@
|
||||
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o - \
|
||||
# RUN: | llvm-objdump -d - | FileCheck %s
|
||||
|
||||
# CHECK: foo:
|
||||
# CHECK-NEXT: 0: 0c 00 00 02 jal 8 <loc1>
|
||||
# CHECK-NEXT: 4: 00 00 00 00 nop
|
||||
#
|
||||
# CHECK: loc1:
|
||||
# CHECK-NEXT: 8: 0c 00 00 06 jal 24 <loc3>
|
||||
# CHECK-NEXT: c: 00 00 00 00 nop
|
||||
#
|
||||
# CHECK: loc2:
|
||||
# CHECK-NEXT: 10: 10 00 ff fd b -8 <loc1>
|
||||
# CHECK-NEXT: 14: 00 00 00 00 nop
|
||||
#
|
||||
# CHECK: loc3:
|
||||
# CHECK-NEXT: 18: 10 43 ff fd beq $2, $3, -8 <loc2>
|
||||
# CHECK-NEXT: 1c: 00 00 00 00 nop
|
||||
# CHECK-NEXT: 20: 04 11 ff f9 bal -24 <loc1>
|
||||
# CHECK-NEXT: 24: 00 00 00 00 nop
|
||||
# CHECK-NEXT: 28: 08 00 00 04 j 16 <loc2>
|
||||
|
||||
.text
|
||||
.globl foo
|
||||
.ent foo
|
||||
foo:
|
||||
jal loc1
|
||||
loc1:
|
||||
jal loc3
|
||||
loc2:
|
||||
b loc1
|
||||
loc3:
|
||||
beq $2, $3, loc2
|
||||
bal loc1
|
||||
j loc2
|
||||
.end foo
|
Loading…
Reference in New Issue
Block a user