//===---------------------------------------------------------------------===//
-LSR should know what GPR types a target has from TargetData. This code:
-
-volatile short X, Y; // globals
-
-void foo(int N) {
- int i;
- for (i = 0; i < N; i++) { X = i; Y = i*4; }
-}
-
-produces two near identical IV's (after promotion) on PPC/ARM:
-
-LBB1_2:
- ldr r3, LCPI1_0
- ldr r3, [r3]
- strh r2, [r3]
- ldr r3, LCPI1_1
- ldr r3, [r3]
- strh r1, [r3]
- add r1, r1, #4
- add r2, r2, #1 <- [0,+,1]
- sub r0, r0, #1 <- [0,-,1]
- cmp r0, #0
- bne LBB1_2
-
-LSR should reuse the "+" IV for the exit test.
-
-//===---------------------------------------------------------------------===//
-
Tail call elim should be more aggressive, checking to see if the call is
followed by an uncond branch to an exit block.