1; RUN: llc -march=arm64 -mtriple=arm64-apple-darwin < %s | FileCheck %s 2; Check that the peephole optimizer knows about sext and zext instructions. 3; CHECK: test1sext 4define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind { 5 %C = add i64 %A, %B 6 ; CHECK: add x[[SUM:[0-9]+]], x0, x1 7 %D = trunc i64 %C to i32 8 %E = shl i64 %C, 32 9 %F = ashr i64 %E, 32 10 ; CHECK: sxtw x[[EXT:[0-9]+]], w[[SUM]] 11 store volatile i64 %F, i64 *%P2 12 ; CHECK: str x[[EXT]] 13 store volatile i32 %D, i32* %P 14 ; Reuse low bits of extended register, don't extend live range of SUM. 15 ; CHECK: str w[[SUM]] 16 ret i32 %D 17} 18