static SDValue getAtomicLoadArithTargetConstant(SelectionDAG *CurDAG,
SDLoc dl,
enum AtomicOpc &Op, MVT NVT,
- SDValue Val) {
+ SDValue Val,
+ const X86Subtarget *Subtarget) {
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Val)) {
int64_t CNVal = CN->getSExtValue();
// Quit if not 32-bit imm.
// For atomic-load-add, we could do some optimizations.
if (Op == ADD) {
// Translate to INC/DEC if ADD by 1 or -1.
- if ((CNVal == 1) || (CNVal == -1)) {
+ if (((CNVal == 1) || (CNVal == -1)) && !Subtarget->slowIncDec()) {
Op = (CNVal == 1) ? INC : DEC;
// No more constant operand after being translated into INC/DEC.
return SDValue();
break;
}
- Val = getAtomicLoadArithTargetConstant(CurDAG, dl, Op, NVT, Val);
+ Val = getAtomicLoadArithTargetConstant(CurDAG, dl, Op, NVT, Val, Subtarget);
bool isUnOp = !Val.getNode();
bool isCN = Val.getNode() && (Val.getOpcode() == ISD::TargetConstant);
; RUN: llc < %s -march=x86-64 -verify-machineinstrs | FileCheck %s
+; RUN: llc < %s -march=x86-64 -mattr=slow-incdec -verify-machineinstrs | FileCheck %s --check-prefix SLOW_INC
; rdar://7103704
entry:
; CHECK-LABEL: inc4:
; CHECK: incq
+; SLOW_INC-LABEL: inc4:
+; SLOW_INC-NOT: incq
%0 = atomicrmw add i64* %p, i64 1 monotonic
ret void
}
entry:
; CHECK-LABEL: inc3:
; CHECK: incb
+; SLOW_INC-LABEL: inc3:
+; SLOW_INC-NOT: incb
%0 = atomicrmw add i8* %p, i8 1 monotonic
ret void
}
entry:
; CHECK-LABEL: inc2:
; CHECK: incw
+; SLOW_INC-LABEL: inc2:
+; SLOW_INC-NOT: incw
%0 = atomicrmw add i16* %p, i16 1 monotonic
ret void
}
entry:
; CHECK-LABEL: inc1:
; CHECK: incl
+; SLOW_INC-LABEL: inc1:
+; SLOW_INC-NOT: incl
%0 = atomicrmw add i32* %p, i32 1 monotonic
ret void
}
entry:
; CHECK-LABEL: dec4:
; CHECK: decq
+; SLOW_INC-LABEL: dec4:
+; SLOW_INC-NOT: decq
%0 = atomicrmw sub i64* %p, i64 1 monotonic
ret void
}
entry:
; CHECK-LABEL: dec3:
; CHECK: decb
+; SLOW_INC-LABEL: dec3:
+; SLOW_INC-NOT: decb
%0 = atomicrmw sub i8* %p, i8 1 monotonic
ret void
}
entry:
; CHECK-LABEL: dec2:
; CHECK: decw
+; SLOW_INC-LABEL: dec2:
+; SLOW_INC-NOT: decw
%0 = atomicrmw sub i16* %p, i16 1 monotonic
ret void
}
entry:
; CHECK-LABEL: dec1:
; CHECK: decl
+; SLOW_INC-LABEL: dec1:
+; SLOW_INC-NOT: decl
%0 = atomicrmw sub i32* %p, i32 1 monotonic
ret void
}