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. 6 define i64 @csed-impdef-killflag(i64 %a) { 7 ; CHECK-LABEL: csed-impdef-killflag 8 ; CHECK-DAG: mov [[REG0:w[0-9]+]], wzr 9 ; CHECK-DAG: orr [[REG1:w[0-9]+]], wzr, #0x1 10 ; CHECK-DAG: orr [[REG2:x[0-9]+]], xzr, #0x2 11 ; CHECK-DAG: orr [[REG3:x[0-9]+]], xzr, #0x3 12 ; CHECK: cmp x0, #0 13 ; CHECK-DAG: csel w[[SELECT_WREG_1:[0-9]+]], [[REG0]], [[REG1]], ne 14 ; CHECK-DAG: csel [[SELECT_XREG_2:x[0-9]+]], [[REG2]], [[REG3]], ne 15 ; CHECK: ubfx [[SELECT_XREG_1:x[0-9]+]], x[[SELECT_WREG_1]], #0, #32 16 ; CHECK-NEXT: add x0, [[SELECT_XREG_2]], [[SELECT_XREG_1]] 17 ; CHECK-NEXT: ret 18 19 %1 = icmp ne i64 %a, 0 20 %2 = select i1 %1, i32 0, i32 1 21 %3 = icmp ne i64 %a, 0 22 %4 = select i1 %3, i64 2, i64 3 23 %5 = zext i32 %2 to i64 24 %6 = add i64 %4, %5 25 ret i64 %6 26 } 27
