/// canFoldInAddressingMode - Return true if 'Use' is a load or a store that
/// uses N as its base pointer and that N may be folded in the load / store
-/// addressing mode. FIXME: This currently only looks for folding of
-/// [reg +/- imm] addressing modes.
+/// addressing mode.
static bool canFoldInAddressingMode(SDNode *N, SDNode *Use,
SelectionDAG &DAG,
const TargetLowering &TLI) {
if (N->getOpcode() == ISD::ADD) {
ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1));
if (Offset)
+ // [reg +/- imm]
AM.BaseOffs = Offset->getSExtValue();
else
- return false;
+ // [reg +/- reg]
+ AM.Scale = 1;
} else if (N->getOpcode() == ISD::SUB) {
ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1));
if (Offset)
+ // [reg +/- imm]
AM.BaseOffs = -Offset->getSExtValue();
else
- return false;
+ // [reg +/- reg]
+ AM.Scale = 1;
} else
return false;
define fastcc void @test4(i16 %addr) nounwind {
entry:
; A8: test4:
-; A8: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]!
-; A8: str [[REG]], [r0]
+; A8: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]
+; A8-NOT: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]!
+; A8: str [[REG]], [r0, r1, lsl #2]
+; A8-NOT: str [[REG]], [r0]
; A9: test4:
-; A9: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]!
-; A9: str [[REG]], [r0]
+; A9: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]
+; A9-NOT: ldr [[REG:r[0-9]+]], [r0, r1, lsl #2]!
+; A9: str [[REG]], [r0, r1, lsl #2]
+; A9-NOT: str [[REG]], [r0]
%0 = tail call i8* (...)* @malloc(i32 undef) nounwind
%1 = bitcast i8* %0 to i32*
%2 = sext i16 %addr to i32