mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-18 12:29:21 +00:00
Fold setcc instructions into select and branches that are not in the same BB as
the setcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14212 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
6713d988a4
commit
a6f9fe6dbc
@ -839,16 +839,14 @@ void ISel::getAddressingMode(Value *Addr, unsigned &BaseReg, unsigned &Scale,
|
||||
// canFoldSetCCIntoBranchOrSelect - Return the setcc instruction if we can fold
|
||||
// it into the conditional branch or select instruction which is the only user
|
||||
// of the cc instruction. This is the case if the conditional branch is the
|
||||
// only user of the setcc, and if the setcc is in the same basic block as the
|
||||
// conditional branch. We also don't handle long arguments below, so we reject
|
||||
// them here as well.
|
||||
// only user of the setcc. We also don't handle long arguments below, so we
|
||||
// reject them here as well.
|
||||
//
|
||||
static SetCondInst *canFoldSetCCIntoBranchOrSelect(Value *V) {
|
||||
if (SetCondInst *SCI = dyn_cast<SetCondInst>(V))
|
||||
if (SCI->hasOneUse()) {
|
||||
Instruction *User = cast<Instruction>(SCI->use_back());
|
||||
if ((isa<BranchInst>(User) || isa<SelectInst>(User)) &&
|
||||
SCI->getParent() == User->getParent() &&
|
||||
(getClassB(SCI->getOperand(0)->getType()) != cLong ||
|
||||
SCI->getOpcode() == Instruction::SetEQ ||
|
||||
SCI->getOpcode() == Instruction::SetNE))
|
||||
|
@ -839,16 +839,14 @@ void ISel::getAddressingMode(Value *Addr, unsigned &BaseReg, unsigned &Scale,
|
||||
// canFoldSetCCIntoBranchOrSelect - Return the setcc instruction if we can fold
|
||||
// it into the conditional branch or select instruction which is the only user
|
||||
// of the cc instruction. This is the case if the conditional branch is the
|
||||
// only user of the setcc, and if the setcc is in the same basic block as the
|
||||
// conditional branch. We also don't handle long arguments below, so we reject
|
||||
// them here as well.
|
||||
// only user of the setcc. We also don't handle long arguments below, so we
|
||||
// reject them here as well.
|
||||
//
|
||||
static SetCondInst *canFoldSetCCIntoBranchOrSelect(Value *V) {
|
||||
if (SetCondInst *SCI = dyn_cast<SetCondInst>(V))
|
||||
if (SCI->hasOneUse()) {
|
||||
Instruction *User = cast<Instruction>(SCI->use_back());
|
||||
if ((isa<BranchInst>(User) || isa<SelectInst>(User)) &&
|
||||
SCI->getParent() == User->getParent() &&
|
||||
(getClassB(SCI->getOperand(0)->getType()) != cLong ||
|
||||
SCI->getOpcode() == Instruction::SetEQ ||
|
||||
SCI->getOpcode() == Instruction::SetNE))
|
||||
|
Loading…
Reference in New Issue
Block a user