// Control Flow Instructions.
//
-let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
- def tBX_RET : TI<(outs), (ins), IIC_Br, "bx\tlr",
- [(ARMretflag)]>,
- T1Special<{1,1,0,?}> {
- // A6.2.3 & A8.6.25
- let Inst{6-3} = 0b1110; // Rm = lr
- let Inst{2-0} = 0b000;
- }
-
- // Alternative return instruction used by vararg functions.
- def tBX_RET_vararg : TI<(outs), (ins tGPR:$Rm),
- IIC_Br, "bx\t$Rm",
- []>,
- T1Special<{1,1,0,?}> {
- // A6.2.3 & A8.6.25
- bits<4> Rm;
- let Inst{6-3} = Rm;
- let Inst{2-0} = 0b000;
- }
-}
-
// Indirect branches
let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
def tBX : TI<(outs), (ins GPR:$Rm, pred:$p), IIC_Br, "bx${p}\t$Rm", []>,
}
}
+let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
+ def tBX_RET : TI<(outs), (ins), IIC_Br, "bx\tlr",
+ [(ARMretflag)]>,
+ T1Special<{1,1,0,?}> {
+ // A6.2.3 & A8.6.25
+ let Inst{6-3} = 0b1110; // Rm = lr
+ let Inst{2-0} = 0b000;
+ }
+
+ // Alternative return instruction used by vararg functions.
+ def tBX_RET_vararg : TI<(outs), (ins tGPR:$Rm),
+ IIC_Br, "bx\t$Rm",
+ []>,
+ T1Special<{1,1,0,?}> {
+ // A6.2.3 & A8.6.25
+ bits<4> Rm;
+ let Inst{6-3} = Rm;
+ let Inst{2-0} = 0b000;
+ }
+}
+
// All calls clobber the non-callee saved registers. SP is marked as a use to
// prevent stack-pointer assignments that appear immediately before calls from
// potentially appearing dead.