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https://github.com/RPCS3/llvm-mirror.git
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3f23d4b8c3
tryLatency compares two sched candidates. For the top zone it prefers the one with lesser depth, but only if that depth is greater than the total latency of the instructions we've already scheduled -- otherwise its latency would be hidden and there would be no stall. Unfortunately it only tests the depth of one of the candidates. This can lead to situations where the TopDepthReduce heuristic does not kick in, but a lower priority heuristic chooses the other candidate, whose depth *is* greater than the already scheduled latency, which causes a stall. The fix is to apply the heuristic if the depth of *either* candidate is greater than the already scheduled latency. All this also applies to the BotHeightReduce heuristic in the bottom zone. Differential Revision: https://reviews.llvm.org/D72392
116 lines
5.8 KiB
YAML
116 lines
5.8 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -run-pass=machine-scheduler -verify-machineinstrs %s -o - | FileCheck %s
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# The sequence of DBG_VALUEs forms a scheduling region with 0 real
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# instructions. The RegPressure tracker would end up skipping over any
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# debug instructions, so it would point to the instruction
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# before/outside of the region, hitting this assert:
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# assert((BotRPTracker.getPos() == RegionEnd ||
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# (RegionEnd->isDebugInstr() &&
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# BotRPTracker.getPos() == priorNonDebug(RegionEnd, RegionBegin))) &&
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# "Can't find the region bottom");
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---
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name: only_dbg_value_sched_region
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tracksRegLiveness: true
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machineFunctionInfo:
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isEntryFunction: true
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waveLimiter: true
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body: |
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; CHECK-LABEL: name: only_dbg_value_sched_region
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
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; CHECK: [[DEF:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: [[GLOBAL_LOAD_DWORDX2_:%[0-9]+]]:vreg_64 = GLOBAL_LOAD_DWORDX2 [[DEF]], 0, 0, 0, 0, implicit $exec
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; CHECK: [[GLOBAL_LOAD_DWORD:%[0-9]+]]:vgpr_32 = GLOBAL_LOAD_DWORD [[DEF]], 8, 0, 0, 0, implicit $exec
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; CHECK: [[COPY1:%[0-9]+]]:vreg_64 = COPY [[GLOBAL_LOAD_DWORDX2_]]
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; CHECK: undef %6.sub0:vreg_64 = V_ADD_F32_e32 [[DEF]].sub0, [[COPY1]].sub0, implicit $mode, implicit $exec
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; CHECK: dead undef %6.sub1:vreg_64 = V_ADD_F32_e32 [[DEF]].sub1, [[COPY1]].sub0, implicit $mode, implicit $exec
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; CHECK: [[GLOBAL_LOAD_DWORD1:%[0-9]+]]:vgpr_32 = GLOBAL_LOAD_DWORD [[COPY1]], 0, 0, 0, 0, implicit $exec
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; CHECK: undef %4.sub0:vreg_64 = V_MOV_B32_e32 111, implicit $exec
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; CHECK: [[DEF1:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: [[DEF2:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: [[DEF3:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: undef %11.sub1:vreg_64 = IMPLICIT_DEF
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; CHECK: [[DEF4:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
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; CHECK: [[DEF5:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
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; CHECK: [[DEF6:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: undef %19.sub0:vreg_64 = V_ADD_F32_e32 [[GLOBAL_LOAD_DWORD1]], [[GLOBAL_LOAD_DWORDX2_]].sub0, implicit $mode, implicit $exec
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; CHECK: [[DEF7:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
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; CHECK: %19.sub1:vreg_64 = V_ADD_F32_e32 [[GLOBAL_LOAD_DWORD]], [[GLOBAL_LOAD_DWORD]], implicit $mode, implicit $exec
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; CHECK: [[DEF8:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
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; CHECK: %4.sub1:vreg_64 = V_ADD_U32_e32 [[COPY]], [[COPY]], implicit $exec
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; CHECK: GLOBAL_STORE_DWORDX2 %19, %4, 32, 0, 0, 0, implicit $exec
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; CHECK: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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; CHECK: [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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; CHECK: %11.sub0:vreg_64 = GLOBAL_LOAD_DWORD [[DEF2]], 0, 0, 0, 0, implicit $exec
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; CHECK: [[DEF1]].sub0:vreg_64 = GLOBAL_LOAD_DWORD [[DEF3]], 0, 0, 0, 0, implicit $exec
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; CHECK: dead %20:vgpr_32 = GLOBAL_LOAD_DWORD %11, 0, 0, 0, 0, implicit $exec
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; CHECK: dead %21:vgpr_32 = GLOBAL_LOAD_DWORD [[DEF6]], 0, 0, 0, 0, implicit $exec
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; CHECK: [[V_LSHLREV_B64_:%[0-9]+]]:vreg_64 = V_LSHLREV_B64 2, [[DEF1]], implicit $exec
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; CHECK: dead %22:vgpr_32 = GLOBAL_LOAD_DWORD [[DEF7]], 0, 0, 0, 0, implicit $exec
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; CHECK: S_NOP 0, implicit [[DEF5]], implicit [[V_LSHLREV_B64_]].sub0, implicit [[DEF4]], implicit [[V_MOV_B32_e32_]]
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; CHECK: GLOBAL_STORE_DWORD [[DEF7]], [[V_MOV_B32_e32_1]], 0, 0, 0, 0, implicit $exec
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x80000000)
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; CHECK: S_SETREG_IMM32_B32 0, 1, implicit-def $mode, implicit $mode
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; CHECK: DBG_VALUE
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; CHECK: DBG_VALUE
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; CHECK: DBG_VALUE
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; CHECK: S_SETREG_IMM32_B32 0, 1, implicit-def $mode, implicit $mode
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; CHECK: bb.2:
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; CHECK: S_NOP 0, implicit [[COPY]]
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; CHECK: S_NOP 0, implicit [[DEF8]]
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; CHECK: S_ENDPGM 0
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bb.0:
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liveins: $vgpr0
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%0:vgpr_32 = COPY $vgpr0
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%1:vreg_64 = IMPLICIT_DEF
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%2:vreg_64 = GLOBAL_LOAD_DWORDX2 %1, 0, 0, 0, 0, implicit $exec
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%3:vgpr_32 = GLOBAL_LOAD_DWORD %1, 8, 0, 0, 0, implicit $exec
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undef %4.sub1:vreg_64 = V_ADD_U32_e32 %0, %0, implicit $exec
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%4.sub0:vreg_64 = V_MOV_B32_e32 111, implicit $exec
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%5:vreg_64 = COPY %2
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undef %6.sub0:vreg_64 = V_ADD_F32_e32 %1.sub0, %5.sub0, implicit $mode, implicit $exec
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%6.sub1:vreg_64 = V_ADD_F32_e32 %1.sub1, %5.sub0, implicit $mode, implicit $exec
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%7:vgpr_32 = GLOBAL_LOAD_DWORD %5, 0, 0, 0, 0, implicit $exec
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%8:vreg_64 = IMPLICIT_DEF
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%9:vreg_64 = IMPLICIT_DEF
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%10:vreg_64 = IMPLICIT_DEF
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undef %11.sub1:vreg_64 = IMPLICIT_DEF
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%12:vgpr_32 = IMPLICIT_DEF
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%13:vgpr_32 = IMPLICIT_DEF
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%14:vreg_64 = IMPLICIT_DEF
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%15:vreg_64 = IMPLICIT_DEF
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%16:vgpr_32 = IMPLICIT_DEF
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%17:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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%18:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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undef %19.sub0:vreg_64 = V_ADD_F32_e32 %7, %2.sub0, implicit $mode, implicit $exec
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%19.sub1:vreg_64 = V_ADD_F32_e32 %3, %3, implicit $mode, implicit $exec
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GLOBAL_STORE_DWORDX2 %19, %4, 32, 0, 0, 0, implicit $exec
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%11.sub0:vreg_64 = GLOBAL_LOAD_DWORD %9, 0, 0, 0, 0, implicit $exec
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%8.sub0:vreg_64 = GLOBAL_LOAD_DWORD %10, 0, 0, 0, 0, implicit $exec
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%20:vgpr_32 = GLOBAL_LOAD_DWORD %11, 0, 0, 0, 0, implicit $exec
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%21:vgpr_32 = GLOBAL_LOAD_DWORD %14, 0, 0, 0, 0, implicit $exec
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%22:vgpr_32 = GLOBAL_LOAD_DWORD %15, 0, 0, 0, 0, implicit $exec
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%23:vreg_64 = V_LSHLREV_B64 2, %8, implicit $exec
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S_NOP 0, implicit %13, implicit %23.sub0, implicit %12, implicit %17
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GLOBAL_STORE_DWORD %15, %18, 0, 0, 0, 0, implicit $exec
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bb.1:
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S_SETREG_IMM32_B32 0, 1, implicit-def $mode, implicit $mode
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DBG_VALUE
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DBG_VALUE
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DBG_VALUE
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S_SETREG_IMM32_B32 0, 1, implicit-def $mode, implicit $mode
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bb.2:
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S_NOP 0, implicit %0
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S_NOP 0, implicit %16
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S_ENDPGM 0
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...
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