6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-18 12:29:27 +00:00
Code Issues Projects Releases Wiki Activity

Minor cleanups

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15091 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-21 23:17:57 +00:00
parent 3dbb504081
commit 1e31363a9e
1 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/CodeGen/TwoAddressInstructionPass.cpp
View File

@ -28,8 +28,8 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "twoaddrinstr"
#include "llvm/Function.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
@ -105,13 +105,8 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
"two address instruction invalid");
// if the two operands are the same we just remove the use
// and mark the def as def&use
if (mi->getOperand(0).getReg() ==
mi->getOperand(1).getReg()) {
}
else {
MadeChange = true;
// and mark the def as def&use, otherwise we have to insert a copy.
if (mi->getOperand(0).getReg() != mi->getOperand(1).getReg()) {
// rewrite:
// a = b op c
// to:
@ -128,9 +123,11 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
// instruction (a = b + a for example) because our
// transformation will not work. This should never occur
// because we are in SSA form.
#ifndef NDEBUG
for (unsigned i = 1; i != mi->getNumOperands(); ++i)
assert(!mi->getOperand(i).isRegister() ||
mi->getOperand(i).getReg() != regA);
#endif
const TargetRegisterClass* rc =
MF.getSSARegMap()->getRegClass(regA);
@ -167,6 +164,7 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
assert(mi->getOperand(0).isDef());
mi->getOperand(0).setUse();
mi->RemoveOperand(1);
MadeChange = true;
DEBUG(std::cerr << "\t\trewrite to:\t";
mi->print(std::cerr, &TM));