File: arm64-misched-memdep-bug.ll

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llvm-toolchain-17 1%3A17.0.6-22
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; 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 (s32) 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 (s32) into %ir.ptr1)
; CHECK:   Successors:
; CHECK: SU(4): Ord  Latency=0
; CHECK: SU(4):   STRWui $wzr, %1:gpr64common, 0 :: (store (s32) into %ir.ptr2)
; CHECK: SU(5):   $w0 = COPY %2
; CHECK: ** ScheduleDAGMI::schedule picking next node
define i32 @misched_bug(ptr %ptr1, ptr %ptr2) {
entry:
  %ptr1_plus1 = getelementptr inbounds i32, ptr %ptr1, i64 1
  %val1 = load i32, ptr %ptr1_plus1, align 4
  store i32 0, ptr %ptr1, align 4
  store i32 0, ptr %ptr2, align 4
  ret i32 %val1
}