test/tools/llvm-mca/X86/BdVer2/partial-reg-update-4.s

   1 # NOTE: Assertions have been autogenerated by utils/update_mca_test_checks.py
   2 # RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=bdver2 -iterations=1500 -timeline -timeline-max-iterations=3 < %s | FileCheck %s
   3
   4 # perf stat reports a throughput of 0.60 IPC for this code snippet.
   5
   6 # The lzcnt cannot execute in parallel with the imul because there is a false
   7 # dependency on %bx.
   8
   9 imul %ax, %bx
  10 lzcnt %ax, %bx
  11 add %cx, %bx
  12
  13 # CHECK:      Iterations:        1500
  14 # CHECK-NEXT: Instructions:      4500
  15 # CHECK-NEXT: Total Cycles:      9753
  16 # CHECK-NEXT: Total uOps:        6000
  17
  18 # CHECK:      Dispatch Width:    4
  19 # CHECK-NEXT: uOps Per Cycle:    0.62
  20 # CHECK-NEXT: IPC:               0.46
  21 # CHECK-NEXT: Block RThroughput: 2.0
  22
  23 # CHECK:      Instruction Info:
  24 # CHECK-NEXT: [1]: #uOps
  25 # CHECK-NEXT: [2]: Latency
  26 # CHECK-NEXT: [3]: RThroughput
  27 # CHECK-NEXT: [4]: MayLoad
  28 # CHECK-NEXT: [5]: MayStore
  29 # CHECK-NEXT: [6]: HasSideEffects (U)
  30
  31 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
  32 # CHECK-NEXT:  1      4     2.00                        imulw   %ax, %bx
  33 # CHECK-NEXT:  2      2     2.00                        lzcntw  %ax, %bx
  34 # CHECK-NEXT:  1      1     1.00                        addw    %cx, %bx
  35
  36 # CHECK:      Resources:
  37 # CHECK-NEXT: [0.0] - PdAGLU01
  38 # CHECK-NEXT: [0.1] - PdAGLU01
  39 # CHECK-NEXT: [1]   - PdBranch
  40 # CHECK-NEXT: [2]   - PdCount
  41 # CHECK-NEXT: [3]   - PdDiv
  42 # CHECK-NEXT: [4]   - PdEX0
  43 # CHECK-NEXT: [5]   - PdEX1
  44 # CHECK-NEXT: [6]   - PdFPCVT
  45 # CHECK-NEXT: [7.0] - PdFPFMA
  46 # CHECK-NEXT: [7.1] - PdFPFMA
  47 # CHECK-NEXT: [8.0] - PdFPMAL
  48 # CHECK-NEXT: [8.1] - PdFPMAL
  49 # CHECK-NEXT: [9]   - PdFPMMA
  50 # CHECK-NEXT: [10]  - PdFPSTO
  51 # CHECK-NEXT: [11]  - PdFPU0
  52 # CHECK-NEXT: [12]  - PdFPU1
  53 # CHECK-NEXT: [13]  - PdFPU2
  54 # CHECK-NEXT: [14]  - PdFPU3
  55 # CHECK-NEXT: [15]  - PdFPXBR
  56 # CHECK-NEXT: [16.0] - PdLoad
  57 # CHECK-NEXT: [16.1] - PdLoad
  58 # CHECK-NEXT: [17]  - PdMul
  59 # CHECK-NEXT: [18]  - PdStore
  60
  61 # CHECK:      Resource pressure per iteration:
  62 # CHECK-NEXT: [0.0]  [0.1]  [1]    [2]    [3]    [4]    [5]    [6]    [7.0]  [7.1]  [8.0]  [8.1]  [9]    [10]   [11]   [12]   [13]   [14]   [15]   [16.0] [16.1] [17]   [18]
  63 # CHECK-NEXT:  -      -      -      -      -     3.00   2.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -     2.00    -
  64
  65 # CHECK:      Resource pressure by instruction:
  66 # CHECK-NEXT: [0.0]  [0.1]  [1]    [2]    [3]    [4]    [5]    [6]    [7.0]  [7.1]  [8.0]  [8.1]  [9]    [10]   [11]   [12]   [13]   [14]   [15]   [16.0] [16.1] [17]   [18]   Instructions:
  67 # CHECK-NEXT:  -      -      -      -      -      -     1.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -     2.00    -     imulw    %ax, %bx
  68 # CHECK-NEXT:  -      -      -      -      -     2.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     lzcntw   %ax, %bx
  69 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     addw     %cx, %bx
  70
  71 # CHECK:      Timeline view:
  72 # CHECK-NEXT:                     0123456789
  73 # CHECK-NEXT: Index     0123456789          01
  74
  75 # CHECK:      [0,0]     DeeeeER   .    .    ..   imulw  %ax, %bx
  76 # CHECK-NEXT: [0,1]     D===eeER  .    .    ..   lzcntw %ax, %bx
  77 # CHECK-NEXT: [0,2]     D=====eER .    .    ..   addw   %cx, %bx
  78 # CHECK-NEXT: [1,0]     .D======eeeeER .    ..   imulw  %ax, %bx
  79 # CHECK-NEXT: [1,1]     .D=========eeER.    ..   lzcntw %ax, %bx
  80 # CHECK-NEXT: [1,2]     .D===========eER    ..   addw   %cx, %bx
  81 # CHECK-NEXT: [2,0]     . D===========eeeeER..   imulw  %ax, %bx
  82 # CHECK-NEXT: [2,1]     . D==============eeER.   lzcntw %ax, %bx
  83 # CHECK-NEXT: [2,2]     . D================eER   addw   %cx, %bx
  84
  85 # CHECK:      Average Wait times (based on the timeline view):
  86 # CHECK-NEXT: [0]: Executions
  87 # CHECK-NEXT: [1]: Average time spent waiting in a scheduler's queue
  88 # CHECK-NEXT: [2]: Average time spent waiting in a scheduler's queue while ready
  89 # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
  90
  91 # CHECK:            [0]    [1]    [2]    [3]
  92 # CHECK-NEXT: 0.     3     6.7    0.7    0.0       imulw        %ax, %bx
  93 # CHECK-NEXT: 1.     3     9.7    0.0    0.0       lzcntw       %ax, %bx
  94 # CHECK-NEXT: 2.     3     11.7   0.0    0.0       addw %cx, %bx