diff options
Diffstat (limited to 'test/CodeGen/AArch64/arm64-misched-memdep-bug.ll')
| -rw-r--r-- | test/CodeGen/AArch64/arm64-misched-memdep-bug.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-misched-memdep-bug.ll b/test/CodeGen/AArch64/arm64-misched-memdep-bug.ll new file mode 100644 index 0000000000000..770521b752805 --- /dev/null +++ b/test/CodeGen/AArch64/arm64-misched-memdep-bug.ll @@ -0,0 +1,22 @@ +; REQUIRES: asserts +; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a57 -enable-misched -verify-misched -debug-only=misched -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): %vreg2<def> = LDRWui %vreg0, 1; mem:LD4[%ptr1_plus1] GPR32:%vreg2 GPR64common:%vreg0 +; CHECK: Successors: +; CHECK-NEXT: val SU(5): Latency=4 Reg=%vreg2 +; CHECK-NEXT: ch SU(4): Latency=0 +; CHECK: SU(4): STRWui %WZR, %vreg1, 0; mem:ST4[%ptr2] GPR64common:%vreg1 +; CHECK: SU(5): %W0<def> = COPY %vreg2; GPR32:%vreg2 +; 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 +} |