1; RUN: llc < %s -mtriple=aarch64-apple-ios -fast-isel -verify-machineinstrs | FileCheck %s 2 3; Check that the kill flag is cleared between CSE'd instructions on their 4; imp-def'd registers. 5; The verifier would complain otherwise. 6define i64 @csed-impdef-killflag(i64 %a) { 7; CHECK-LABEL: csed-impdef-killflag 8; CHECK-DAG: mov [[REG1:w[0-9]+]], #1 9; CHECK-DAG: mov [[REG2:x[0-9]+]], #2 10; CHECK-DAG: mov [[REG3:x[0-9]+]], #3 11; CHECK-DAG: cmp x0, #0 12; CHECK: csel w[[SELECT_WREG_1:[0-9]+]], wzr, [[REG1]], ne 13; CHECK-DAG: csel [[SELECT_XREG_2:x[0-9]+]], [[REG2]], [[REG3]], ne 14; CHECK: ubfx [[SELECT_XREG_1:x[0-9]+]], x[[SELECT_WREG_1]], #0, #32 15; CHECK-NEXT: add x0, [[SELECT_XREG_2]], [[SELECT_XREG_1]] 16; CHECK-NEXT: ret 17 18 %1 = icmp ne i64 %a, 0 19 %2 = select i1 %1, i32 0, i32 1 20 %3 = icmp ne i64 %a, 0 21 %4 = select i1 %3, i64 2, i64 3 22 %5 = zext i32 %2 to i64 23 %6 = add i64 %4, %5 24 ret i64 %6 25} 26