Index: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp =================================================================== --- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp +++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp @@ -12866,15 +12866,21 @@ // On Thumb1, the DAG above may be further combined if z is a power of 2 // (z == 2 ^ K). // CMOV (SUBS x, y), z, !=, (SUBS x, y):1 -> - // merge t3, t4 - // where t1 = (SUBCARRY (SUB x, y), z, 0) - // t2 = (SUBCARRY (SUB x, y), t1:0, t1:1) - // t3 = if K != 0 then (SHL t2:0, K) else t2:0 - // t4 = (SUB 1, t2:1) [ we want a carry, not a borrow ] + // t1 = (USUBO (SUB x, y), 1) + // t2 = (SUBCARRY (SUB x, y), t1:0, t1:1) + // Result = if K != 0 then (SHL t2:0, K) else t2:0 + // + // This also handles the special case of comparing against zero; it's + // essentially, the same pattern, except there's no SUBS: + // CMOV x, z, !=, (CMPZ x, 0) -> + // t1 = (USUBO x, 1) + // t2 = (SUBCARRY x, t1:0, t1:1) + // Result = if K != 0 then (SHL t2:0, K) else t2:0 const APInt *TrueConst; if (Subtarget->isThumb1Only() && CC == ARMCC::NE && - (FalseVal.getOpcode() == ARMISD::SUBS) && - (FalseVal.getOperand(0) == LHS) && (FalseVal.getOperand(1) == RHS) && + ((FalseVal.getOpcode() == ARMISD::SUBS && + FalseVal.getOperand(0) == LHS && FalseVal.getOperand(1) == RHS) || + (FalseVal == LHS && isNullConstant(RHS))) && (TrueConst = isPowerOf2Constant(TrueVal))) { SDVTList VTs = DAG.getVTList(VT, MVT::i32); unsigned ShiftAmount = TrueConst->logBase2(); @@ -12882,10 +12888,6 @@ TrueVal = DAG.getConstant(1, dl, VT); SDValue Subc = DAG.getNode(ISD::USUBO, dl, VTs, FalseVal, TrueVal); Res = DAG.getNode(ISD::SUBCARRY, dl, VTs, FalseVal, Subc, Subc.getValue(1)); - // Make it a carry, not a borrow. - SDValue Carry = DAG.getNode( - ISD::SUB, dl, VT, DAG.getConstant(1, dl, MVT::i32), Res.getValue(1)); - Res = DAG.getNode(ISD::MERGE_VALUES, dl, VTs, Res, Carry); if (ShiftAmount) Res = DAG.getNode(ISD::SHL, dl, VT, Res, Index: llvm/trunk/test/CodeGen/ARM/select-imm.ll =================================================================== --- llvm/trunk/test/CodeGen/ARM/select-imm.ll +++ llvm/trunk/test/CodeGen/ARM/select-imm.ll @@ -137,8 +137,8 @@ ; ARM: movne r0, #1 ; THUMB1-LABEL: t6: -; THUMB1: cmp r{{[0-9]+}}, #0 -; THUMB1: beq +; THUMB1: subs r1, r0, #1 +; THUMB1: sbcs r0, r1 ; THUMB2-LABEL: t6: ; THUMB2-NOT: mov @@ -350,3 +350,47 @@ ; V8MBASE-NOT: movs r0, #0 ; V8MBASE: movw r0, #40960 } + +define i32 @t12(i32 %a) nounwind { +entry: +; ARM-LABEL: t12: +; ARM-NOT: mov +; ARM: cmp r0, #0 +; ARM: movne r0, #1 + +; THUMB1-LABEL: t12: +; THUMB1: subs r1, r0, #1 +; THUMB1: sbcs r0, r1 +; THUMB1: lsls r0, r0, #1 + +; THUMB2-LABEL: t12: +; THUMB2-NOT: mov +; THUMB2: cmp r0, #0 +; THUMB2: it ne +; THUMB2: movne r0, #1 + %tobool = icmp ne i32 %a, 0 + %lnot.ext = select i1 %tobool, i32 2, i32 0 + ret i32 %lnot.ext +} + +define i32 @t13(i32 %a) nounwind { +entry: +; ARM-LABEL: t13: +; ARM-NOT: mov +; ARM: cmp r0, #0 +; ARM: movne r0, #3 + +; THUMB1-LABEL: t13: +; THUMB1: cmp r0, #0 +; THUMB1: beq +; THUMB1: movs r0, #3 + +; THUMB2-LABEL: t13: +; THUMB2-NOT: mov +; THUMB2: cmp r0, #0 +; THUMB2: it ne +; THUMB2: movne r0, #3 + %tobool = icmp ne i32 %a, 0 + %lnot.ext = select i1 %tobool, i32 3, i32 0 + ret i32 %lnot.ext +} Index: llvm/trunk/test/CodeGen/Thumb/umulo-128-legalisation-lowering.ll =================================================================== --- llvm/trunk/test/CodeGen/Thumb/umulo-128-legalisation-lowering.ll +++ llvm/trunk/test/CodeGen/Thumb/umulo-128-legalisation-lowering.ll @@ -6,193 +6,140 @@ ; THUMBV6: @ %bb.0: @ %start ; THUMBV6-NEXT: .save {r4, r5, r6, r7, lr} ; THUMBV6-NEXT: push {r4, r5, r6, r7, lr} -; THUMBV6-NEXT: .pad #84 -; THUMBV6-NEXT: sub sp, #84 -; THUMBV6-NEXT: mov r6, r3 -; THUMBV6-NEXT: mov r7, r2 -; THUMBV6-NEXT: mov r4, r0 +; THUMBV6-NEXT: .pad #68 +; THUMBV6-NEXT: sub sp, #68 +; THUMBV6-NEXT: mov r4, r3 +; THUMBV6-NEXT: str r2, [sp, #56] @ 4-byte Spill +; THUMBV6-NEXT: mov r6, r0 ; THUMBV6-NEXT: movs r5, #0 ; THUMBV6-NEXT: str r5, [sp, #12] ; THUMBV6-NEXT: str r5, [sp, #8] -; THUMBV6-NEXT: ldr r0, [sp, #116] -; THUMBV6-NEXT: str r0, [sp, #72] @ 4-byte Spill +; THUMBV6-NEXT: ldr r0, [sp, #100] +; THUMBV6-NEXT: str r0, [sp, #28] @ 4-byte Spill ; THUMBV6-NEXT: str r0, [sp, #4] -; THUMBV6-NEXT: ldr r0, [sp, #112] -; THUMBV6-NEXT: str r0, [sp, #44] @ 4-byte Spill +; THUMBV6-NEXT: ldr r0, [sp, #96] +; THUMBV6-NEXT: str r0, [sp, #64] @ 4-byte Spill ; THUMBV6-NEXT: str r0, [sp] ; THUMBV6-NEXT: mov r0, r2 ; THUMBV6-NEXT: mov r1, r3 ; THUMBV6-NEXT: mov r2, r5 ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __multi3 -; THUMBV6-NEXT: str r2, [sp, #36] @ 4-byte Spill -; THUMBV6-NEXT: str r3, [sp, #40] @ 4-byte Spill -; THUMBV6-NEXT: str r4, [sp, #76] @ 4-byte Spill -; THUMBV6-NEXT: stm r4!, {r0, r1} -; THUMBV6-NEXT: ldr r4, [sp, #120] -; THUMBV6-NEXT: str r6, [sp, #56] @ 4-byte Spill -; THUMBV6-NEXT: mov r0, r6 +; THUMBV6-NEXT: str r2, [sp, #48] @ 4-byte Spill +; THUMBV6-NEXT: str r3, [sp, #52] @ 4-byte Spill +; THUMBV6-NEXT: str r6, [sp, #44] @ 4-byte Spill +; THUMBV6-NEXT: stm r6!, {r0, r1} +; THUMBV6-NEXT: ldr r2, [sp, #104] +; THUMBV6-NEXT: str r2, [sp, #60] @ 4-byte Spill +; THUMBV6-NEXT: mov r0, r4 ; THUMBV6-NEXT: mov r1, r5 -; THUMBV6-NEXT: mov r2, r4 ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul -; THUMBV6-NEXT: mov r6, r0 -; THUMBV6-NEXT: str r1, [sp, #48] @ 4-byte Spill -; THUMBV6-NEXT: ldr r0, [sp, #124] -; THUMBV6-NEXT: str r0, [sp, #80] @ 4-byte Spill +; THUMBV6-NEXT: str r0, [sp, #36] @ 4-byte Spill +; THUMBV6-NEXT: mov r7, r1 +; THUMBV6-NEXT: subs r0, r1, #1 +; THUMBV6-NEXT: sbcs r7, r0 +; THUMBV6-NEXT: ldr r6, [sp, #108] +; THUMBV6-NEXT: mov r0, r6 ; THUMBV6-NEXT: mov r1, r5 -; THUMBV6-NEXT: mov r2, r7 +; THUMBV6-NEXT: ldr r2, [sp, #56] @ 4-byte Reload ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul -; THUMBV6-NEXT: str r1, [sp, #24] @ 4-byte Spill -; THUMBV6-NEXT: adds r6, r0, r6 -; THUMBV6-NEXT: str r4, [sp, #68] @ 4-byte Spill -; THUMBV6-NEXT: mov r0, r4 +; THUMBV6-NEXT: subs r2, r1, #1 +; THUMBV6-NEXT: sbcs r1, r2 +; THUMBV6-NEXT: subs r2, r4, #1 +; THUMBV6-NEXT: sbcs r4, r2 +; THUMBV6-NEXT: str r6, [sp, #40] @ 4-byte Spill +; THUMBV6-NEXT: subs r2, r6, #1 +; THUMBV6-NEXT: sbcs r6, r2 +; THUMBV6-NEXT: ands r6, r4 +; THUMBV6-NEXT: orrs r6, r1 +; THUMBV6-NEXT: orrs r6, r7 +; THUMBV6-NEXT: ldr r1, [sp, #36] @ 4-byte Reload +; THUMBV6-NEXT: adds r4, r0, r1 +; THUMBV6-NEXT: ldr r0, [sp, #60] @ 4-byte Reload ; THUMBV6-NEXT: mov r1, r5 -; THUMBV6-NEXT: mov r2, r7 +; THUMBV6-NEXT: ldr r2, [sp, #56] @ 4-byte Reload ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul -; THUMBV6-NEXT: str r0, [sp, #20] @ 4-byte Spill -; THUMBV6-NEXT: adds r0, r1, r6 -; THUMBV6-NEXT: str r0, [sp, #16] @ 4-byte Spill +; THUMBV6-NEXT: str r0, [sp, #36] @ 4-byte Spill +; THUMBV6-NEXT: adds r0, r1, r4 +; THUMBV6-NEXT: str r0, [sp, #32] @ 4-byte Spill ; THUMBV6-NEXT: mov r0, r5 ; THUMBV6-NEXT: adcs r0, r5 -; THUMBV6-NEXT: str r0, [sp, #60] @ 4-byte Spill -; THUMBV6-NEXT: ldr r4, [sp, #104] -; THUMBV6-NEXT: ldr r0, [sp, #72] @ 4-byte Reload +; THUMBV6-NEXT: orrs r0, r6 +; THUMBV6-NEXT: str r0, [sp, #24] @ 4-byte Spill +; THUMBV6-NEXT: ldr r4, [sp, #88] +; THUMBV6-NEXT: ldr r7, [sp, #28] @ 4-byte Reload +; THUMBV6-NEXT: mov r0, r7 ; THUMBV6-NEXT: mov r1, r5 ; THUMBV6-NEXT: mov r2, r4 ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul -; THUMBV6-NEXT: mov r6, r0 -; THUMBV6-NEXT: str r1, [sp, #52] @ 4-byte Spill -; THUMBV6-NEXT: ldr r0, [sp, #108] -; THUMBV6-NEXT: str r0, [sp, #32] @ 4-byte Spill +; THUMBV6-NEXT: str r0, [sp, #20] @ 4-byte Spill +; THUMBV6-NEXT: mov r6, r1 +; THUMBV6-NEXT: subs r0, r1, #1 +; THUMBV6-NEXT: sbcs r6, r0 +; THUMBV6-NEXT: ldr r0, [sp, #92] +; THUMBV6-NEXT: str r0, [sp, #56] @ 4-byte Spill ; THUMBV6-NEXT: mov r1, r5 -; THUMBV6-NEXT: ldr r7, [sp, #44] @ 4-byte Reload -; THUMBV6-NEXT: mov r2, r7 +; THUMBV6-NEXT: ldr r2, [sp, #64] @ 4-byte Reload ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul -; THUMBV6-NEXT: str r1, [sp, #28] @ 4-byte Spill -; THUMBV6-NEXT: adds r6, r0, r6 -; THUMBV6-NEXT: str r4, [sp, #64] @ 4-byte Spill +; THUMBV6-NEXT: str r0, [sp, #16] @ 4-byte Spill +; THUMBV6-NEXT: subs r2, r1, #1 +; THUMBV6-NEXT: sbcs r1, r2 +; THUMBV6-NEXT: subs r2, r7, #1 +; THUMBV6-NEXT: sbcs r7, r2 +; THUMBV6-NEXT: mov r3, r7 +; THUMBV6-NEXT: ldr r7, [sp, #56] @ 4-byte Reload +; THUMBV6-NEXT: subs r2, r7, #1 +; THUMBV6-NEXT: sbcs r7, r2 +; THUMBV6-NEXT: ands r7, r3 +; THUMBV6-NEXT: orrs r7, r1 +; THUMBV6-NEXT: orrs r7, r6 +; THUMBV6-NEXT: ldr r0, [sp, #20] @ 4-byte Reload +; THUMBV6-NEXT: ldr r1, [sp, #16] @ 4-byte Reload +; THUMBV6-NEXT: adds r6, r1, r0 ; THUMBV6-NEXT: mov r0, r4 ; THUMBV6-NEXT: mov r1, r5 -; THUMBV6-NEXT: mov r2, r7 +; THUMBV6-NEXT: ldr r2, [sp, #64] @ 4-byte Reload ; THUMBV6-NEXT: mov r3, r5 ; THUMBV6-NEXT: bl __aeabi_lmul ; THUMBV6-NEXT: adds r1, r1, r6 ; THUMBV6-NEXT: mov r2, r5 ; THUMBV6-NEXT: adcs r2, r5 -; THUMBV6-NEXT: str r2, [sp, #44] @ 4-byte Spill -; THUMBV6-NEXT: ldr r2, [sp, #20] @ 4-byte Reload +; THUMBV6-NEXT: orrs r2, r7 +; THUMBV6-NEXT: ldr r6, [sp, #60] @ 4-byte Reload +; THUMBV6-NEXT: ldr r3, [sp, #40] @ 4-byte Reload +; THUMBV6-NEXT: orrs r6, r3 +; THUMBV6-NEXT: subs r3, r6, #1 +; THUMBV6-NEXT: sbcs r6, r3 +; THUMBV6-NEXT: ldr r3, [sp, #56] @ 4-byte Reload +; THUMBV6-NEXT: orrs r4, r3 +; THUMBV6-NEXT: subs r3, r4, #1 +; THUMBV6-NEXT: sbcs r4, r3 +; THUMBV6-NEXT: ands r4, r6 +; THUMBV6-NEXT: orrs r4, r2 +; THUMBV6-NEXT: ldr r2, [sp, #24] @ 4-byte Reload +; THUMBV6-NEXT: orrs r4, r2 +; THUMBV6-NEXT: ldr r2, [sp, #36] @ 4-byte Reload ; THUMBV6-NEXT: adds r0, r0, r2 -; THUMBV6-NEXT: ldr r2, [sp, #16] @ 4-byte Reload +; THUMBV6-NEXT: ldr r2, [sp, #32] @ 4-byte Reload ; THUMBV6-NEXT: adcs r1, r2 -; THUMBV6-NEXT: ldr r2, [sp, #36] @ 4-byte Reload +; THUMBV6-NEXT: ldr r2, [sp, #48] @ 4-byte Reload ; THUMBV6-NEXT: adds r0, r2, r0 -; THUMBV6-NEXT: ldr r2, [sp, #76] @ 4-byte Reload +; THUMBV6-NEXT: ldr r2, [sp, #44] @ 4-byte Reload ; THUMBV6-NEXT: str r0, [r2, #8] -; THUMBV6-NEXT: ldr r0, [sp, #40] @ 4-byte Reload +; THUMBV6-NEXT: ldr r0, [sp, #52] @ 4-byte Reload ; THUMBV6-NEXT: adcs r1, r0 ; THUMBV6-NEXT: str r1, [r2, #12] -; THUMBV6-NEXT: ldr r1, [sp, #24] @ 4-byte Reload ; THUMBV6-NEXT: adcs r5, r5 +; THUMBV6-NEXT: orrs r5, r4 ; THUMBV6-NEXT: movs r0, #1 -; THUMBV6-NEXT: cmp r1, #0 -; THUMBV6-NEXT: mov r2, r0 -; THUMBV6-NEXT: bne .LBB0_2 -; THUMBV6-NEXT: @ %bb.1: @ %start -; THUMBV6-NEXT: mov r2, r1 -; THUMBV6-NEXT: .LBB0_2: @ %start -; THUMBV6-NEXT: str r2, [sp, #40] @ 4-byte Spill -; THUMBV6-NEXT: ldr r1, [sp, #56] @ 4-byte Reload -; THUMBV6-NEXT: cmp r1, #0 -; THUMBV6-NEXT: mov r4, r0 -; THUMBV6-NEXT: bne .LBB0_4 -; THUMBV6-NEXT: @ %bb.3: @ %start -; THUMBV6-NEXT: mov r4, r1 -; THUMBV6-NEXT: .LBB0_4: @ %start -; THUMBV6-NEXT: ldr r1, [sp, #80] @ 4-byte Reload -; THUMBV6-NEXT: cmp r1, #0 -; THUMBV6-NEXT: mov r2, r0 -; THUMBV6-NEXT: ldr r3, [sp, #48] @ 4-byte Reload -; THUMBV6-NEXT: ldr r7, [sp, #28] @ 4-byte Reload -; THUMBV6-NEXT: bne .LBB0_6 -; THUMBV6-NEXT: @ %bb.5: @ %start -; THUMBV6-NEXT: ldr r2, [sp, #80] @ 4-byte Reload -; THUMBV6-NEXT: .LBB0_6: @ %start -; THUMBV6-NEXT: cmp r3, #0 -; THUMBV6-NEXT: mov r6, r0 -; THUMBV6-NEXT: ldr r1, [sp, #72] @ 4-byte Reload -; THUMBV6-NEXT: bne .LBB0_8 -; THUMBV6-NEXT: @ %bb.7: @ %start -; THUMBV6-NEXT: mov r6, r3 -; THUMBV6-NEXT: .LBB0_8: @ %start -; THUMBV6-NEXT: str r6, [sp, #56] @ 4-byte Spill -; THUMBV6-NEXT: ldr r6, [sp, #32] @ 4-byte Reload -; THUMBV6-NEXT: cmp r7, #0 -; THUMBV6-NEXT: mov r3, r0 -; THUMBV6-NEXT: bne .LBB0_10 -; THUMBV6-NEXT: @ %bb.9: @ %start -; THUMBV6-NEXT: mov r3, r7 -; THUMBV6-NEXT: .LBB0_10: @ %start -; THUMBV6-NEXT: cmp r1, #0 -; THUMBV6-NEXT: mov r7, r1 -; THUMBV6-NEXT: mov r1, r0 -; THUMBV6-NEXT: bne .LBB0_12 -; THUMBV6-NEXT: @ %bb.11: @ %start -; THUMBV6-NEXT: mov r1, r7 -; THUMBV6-NEXT: .LBB0_12: @ %start -; THUMBV6-NEXT: ands r2, r4 -; THUMBV6-NEXT: mov r7, r6 -; THUMBV6-NEXT: cmp r6, #0 -; THUMBV6-NEXT: mov r4, r0 -; THUMBV6-NEXT: bne .LBB0_14 -; THUMBV6-NEXT: @ %bb.13: @ %start -; THUMBV6-NEXT: mov r4, r7 -; THUMBV6-NEXT: .LBB0_14: @ %start -; THUMBV6-NEXT: ldr r6, [sp, #40] @ 4-byte Reload -; THUMBV6-NEXT: orrs r2, r6 -; THUMBV6-NEXT: ands r4, r1 -; THUMBV6-NEXT: orrs r4, r3 -; THUMBV6-NEXT: ldr r3, [sp, #52] @ 4-byte Reload -; THUMBV6-NEXT: cmp r3, #0 -; THUMBV6-NEXT: mov r1, r0 -; THUMBV6-NEXT: bne .LBB0_16 -; THUMBV6-NEXT: @ %bb.15: @ %start -; THUMBV6-NEXT: mov r1, r3 -; THUMBV6-NEXT: .LBB0_16: @ %start -; THUMBV6-NEXT: ldr r3, [sp, #56] @ 4-byte Reload -; THUMBV6-NEXT: orrs r2, r3 -; THUMBV6-NEXT: orrs r4, r1 -; THUMBV6-NEXT: ldr r1, [sp, #68] @ 4-byte Reload -; THUMBV6-NEXT: ldr r3, [sp, #80] @ 4-byte Reload -; THUMBV6-NEXT: orrs r1, r3 -; THUMBV6-NEXT: mov r3, r0 -; THUMBV6-NEXT: bne .LBB0_18 -; THUMBV6-NEXT: @ %bb.17: @ %start -; THUMBV6-NEXT: mov r3, r1 -; THUMBV6-NEXT: .LBB0_18: @ %start -; THUMBV6-NEXT: ldr r1, [sp, #60] @ 4-byte Reload -; THUMBV6-NEXT: orrs r2, r1 -; THUMBV6-NEXT: ldr r1, [sp, #44] @ 4-byte Reload -; THUMBV6-NEXT: orrs r4, r1 -; THUMBV6-NEXT: ldr r6, [sp, #64] @ 4-byte Reload -; THUMBV6-NEXT: orrs r6, r7 -; THUMBV6-NEXT: mov r1, r0 -; THUMBV6-NEXT: bne .LBB0_20 -; THUMBV6-NEXT: @ %bb.19: @ %start -; THUMBV6-NEXT: mov r1, r6 -; THUMBV6-NEXT: .LBB0_20: @ %start -; THUMBV6-NEXT: ands r1, r3 -; THUMBV6-NEXT: orrs r1, r4 -; THUMBV6-NEXT: orrs r1, r2 -; THUMBV6-NEXT: orrs r1, r5 -; THUMBV6-NEXT: ands r1, r0 -; THUMBV6-NEXT: ldr r0, [sp, #76] @ 4-byte Reload -; THUMBV6-NEXT: strb r1, [r0, #16] -; THUMBV6-NEXT: add sp, #84 +; THUMBV6-NEXT: ands r0, r5 +; THUMBV6-NEXT: strb r0, [r2, #16] +; THUMBV6-NEXT: add sp, #68 ; THUMBV6-NEXT: pop {r4, r5, r6, r7, pc} start: %0 = tail call { i128, i1 } @llvm.umul.with.overflow.i128(i128 %l, i128 %r) #2 Index: llvm/trunk/test/CodeGen/Thumb/umulo-32-legalisation-lowering.ll =================================================================== --- llvm/trunk/test/CodeGen/Thumb/umulo-32-legalisation-lowering.ll +++ llvm/trunk/test/CodeGen/Thumb/umulo-32-legalisation-lowering.ll @@ -13,19 +13,10 @@ ; CHECK-BIG-NEXT: movs r0, #0 ; CHECK-BIG-NEXT: movs r2, r0 ; CHECK-NEXT: bl __aeabi_lmul -; CHECK-LITTLE-NEXT: cmp r1, #0 -; CHECK-LITTLE-NEXT: bne .LBB0_2 -; CHECK-LITTLE-NEXT: @ %bb.1: ; CHECK-LITTLE-NEXT: movs r0, r1 -; CHECK-LITTLE-NEXT: b .LBB0_3 -; CHECK-LITTLE-NEXT: .LBB0_2: -; CHECK-LITTLE-NEXT: movs r0, #1 -; CHECK-LITTLE-NEXT: .LBB0_3: -; CHECK-BIG-NEXT: cmp r0, #0 -; CHECK-BIG-NEXT: beq .LBB0_2 -; CHECK-BIG-NEXT: @ %bb.1: -; CHECK-BIG-NEXT: movs r0, #1 -; CHECK-BIG-NEXT: .LBB0_2: +; CHECK-LITTLE-NEXT: subs r1, r1, #1 +; CHECK-BIG-NEXT: subs r1, r0, #1 +; CHECK-NEXT: sbcs r0, r1 ; CHECK-NEXT: pop {r7} ; CHECK-NEXT: pop {r1} ; CHECK-NEXT: bx r1