| ; RUN: llc -mtriple=arm64-apple-darwin < %s | FileCheck %s |
| ; Check that the peephole optimizer knows about sext and zext instructions. |
| ; CHECK: test1sext |
| define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind { |
| %C = add i64 %A, %B |
| ; CHECK: add x[[SUM:[0-9]+]], x0, x1 |
| %D = trunc i64 %C to i32 |
| %E = shl i64 %C, 32 |
| %F = ashr i64 %E, 32 |
| ; CHECK: sxtw x[[EXT:[0-9]+]], w[[SUM]] |
| store volatile i64 %F, i64 *%P2 |
| ; CHECK: str x[[EXT]] |
| store volatile i32 %D, i32* %P |
| ; Reuse low bits of extended register, don't extend live range of SUM. |
| ; CHECK: str w[[SUM]] |
| ret i32 %D |
| } |
