test/tools/llvm-mca/X86/BdVer2/dependency-breaking-sbb-2.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 -timeline -timeline-max-iterations=3 -iterations=1500 < %s | FileCheck %s
   3
   4 # perf stat reports a throughput of 1.51 IPC for this block of code.
   5
   6 # The SBB does not depend on the value of register EAX. That means, it doesn't
   7 # have to wait for the IMUL to write-back on EAX. However, it still depends on
   8 # the ADD for EFLAGS.
   9
  10 imul %edx, %eax
  11 add %edx, %edx
  12 sbb %eax, %eax
  13
  14 # CHECK:      Iterations:        1500
  15 # CHECK-NEXT: Instructions:      4500
  16 # CHECK-NEXT: Total Cycles:      4014
  17 # CHECK-NEXT: Total uOps:        4500
  18
  19 # CHECK:      Dispatch Width:    4
  20 # CHECK-NEXT: uOps Per Cycle:    1.12
  21 # CHECK-NEXT: IPC:               1.12
  22 # CHECK-NEXT: Block RThroughput: 2.0
  23
  24 # CHECK:      Instruction Info:
  25 # CHECK-NEXT: [1]: #uOps
  26 # CHECK-NEXT: [2]: Latency
  27 # CHECK-NEXT: [3]: RThroughput
  28 # CHECK-NEXT: [4]: MayLoad
  29 # CHECK-NEXT: [5]: MayStore
  30 # CHECK-NEXT: [6]: HasSideEffects (U)
  31
  32 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
  33 # CHECK-NEXT:  1      4     2.00                        imull   %edx, %eax
  34 # CHECK-NEXT:  1      1     1.00                        addl    %edx, %edx
  35 # CHECK-NEXT:  1      1     1.00                        sbbl    %eax, %eax
  36
  37 # CHECK:      Resources:
  38 # CHECK-NEXT: [0.0] - PdAGLU01
  39 # CHECK-NEXT: [0.1] - PdAGLU01
  40 # CHECK-NEXT: [1]   - PdBranch
  41 # CHECK-NEXT: [2]   - PdCount
  42 # CHECK-NEXT: [3]   - PdDiv
  43 # CHECK-NEXT: [4]   - PdEX0
  44 # CHECK-NEXT: [5]   - PdEX1
  45 # CHECK-NEXT: [6]   - PdFPCVT
  46 # CHECK-NEXT: [7.0] - PdFPFMA
  47 # CHECK-NEXT: [7.1] - PdFPFMA
  48 # CHECK-NEXT: [8.0] - PdFPMAL
  49 # CHECK-NEXT: [8.1] - PdFPMAL
  50 # CHECK-NEXT: [9]   - PdFPMMA
  51 # CHECK-NEXT: [10]  - PdFPSTO
  52 # CHECK-NEXT: [11]  - PdFPU0
  53 # CHECK-NEXT: [12]  - PdFPU1
  54 # CHECK-NEXT: [13]  - PdFPU2
  55 # CHECK-NEXT: [14]  - PdFPU3
  56 # CHECK-NEXT: [15]  - PdFPXBR
  57 # CHECK-NEXT: [16.0] - PdLoad
  58 # CHECK-NEXT: [16.1] - PdLoad
  59 # CHECK-NEXT: [17]  - PdMul
  60 # CHECK-NEXT: [18]  - PdStore
  61
  62 # CHECK:      Resource pressure per iteration:
  63 # 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]
  64 # CHECK-NEXT:  -      -      -      -      -     2.66   2.34    -      -      -      -      -      -      -      -      -      -      -      -      -      -     2.00    -
  65
  66 # CHECK:      Resource pressure by instruction:
  67 # 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:
  68 # CHECK-NEXT:  -      -      -      -      -      -     1.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -     2.00    -     imull    %edx, %eax
  69 # CHECK-NEXT:  -      -      -      -      -     1.33   0.67    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     addl     %edx, %edx
  70 # CHECK-NEXT:  -      -      -      -      -     1.33   0.67    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     sbbl     %eax, %eax
  71
  72 # CHECK:      Timeline view:
  73 # CHECK-NEXT:                     01234
  74 # CHECK-NEXT: Index     0123456789
  75
  76 # CHECK:      [0,0]     D==eeeeER .   .   imull %edx, %eax
  77 # CHECK-NEXT: [0,1]     DeE-----R .   .   addl  %edx, %edx
  78 # CHECK-NEXT: [0,2]     D===eE--R .   .   sbbl  %eax, %eax
  79 # CHECK-NEXT: [1,0]     D=====eeeeER  .   imull %edx, %eax
  80 # CHECK-NEXT: [1,1]     .DeE-------R  .   addl  %edx, %edx
  81 # CHECK-NEXT: [1,2]     .D====eE---R  .   sbbl  %eax, %eax
  82 # CHECK-NEXT: [2,0]     .D=======eeeeER   imull %edx, %eax
  83 # CHECK-NEXT: [2,1]     .D==eE--------R   addl  %edx, %edx
  84 # CHECK-NEXT: [2,2]     . D=====eE----R   sbbl  %eax, %eax
  85
  86 # CHECK:      Average Wait times (based on the timeline view):
  87 # CHECK-NEXT: [0]: Executions
  88 # CHECK-NEXT: [1]: Average time spent waiting in a scheduler's queue
  89 # CHECK-NEXT: [2]: Average time spent waiting in a scheduler's queue while ready
  90 # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
  91
  92 # CHECK:            [0]    [1]    [2]    [3]
  93 # CHECK-NEXT: 0.     3     5.7    2.0    0.0       imull        %edx, %eax
  94 # CHECK-NEXT: 1.     3     1.7    0.7    6.7       addl %edx, %edx
  95 # CHECK-NEXT: 2.     3     5.0    2.7    3.0       sbbl %eax, %eax
  96 # CHECK-NEXT:        3     4.1    1.8    3.2       <total>