| ; REQUIRES: asserts |
| ; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a57 -enable-misched -verify-misched -debug-only=machine-scheduler -o - 2>&1 > /dev/null | FileCheck %s |
| ; |
| ; Test for bug in misched memory dependency calculation. |
| ; |
| ; CHECK: ********** MI Scheduling ********** |
| ; CHECK: misched_bug:%bb.0 entry |
| ; CHECK: SU(2): %2:gpr32 = LDRWui %0:gpr64common, 1 :: (load 4 from %ir.ptr1_plus1) |
| ; CHECK: Successors: |
| ; CHECK-NEXT: SU(5): Data Latency=4 Reg=%2 |
| ; CHECK-NEXT: SU(4): Ord Latency=0 |
| ; CHECK: SU(3): STRWui $wzr, %0:gpr64common, 0 :: (store 4 into %ir.ptr1) |
| ; CHECK: Successors: |
| ; CHECK: SU(4): Ord Latency=0 |
| ; CHECK: SU(4): STRWui $wzr, %1:gpr64common, 0 :: (store 4 into %ir.ptr2) |
| ; CHECK: SU(5): $w0 = COPY %2 |
| ; CHECK: ** ScheduleDAGMI::schedule picking next node |
| define i32 @misched_bug(i32* %ptr1, i32* %ptr2) { |
| entry: |
| %ptr1_plus1 = getelementptr inbounds i32, i32* %ptr1, i64 1 |
| %val1 = load i32, i32* %ptr1_plus1, align 4 |
| store i32 0, i32* %ptr1, align 4 |
| store i32 0, i32* %ptr2, align 4 |
| ret i32 %val1 |
| } |