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