d4b1be20f6
The condition in canEvictInterferenceBasedOnCost is slightly different from the assertion in evictInteference. canEvictInterferenceBasedOnCost uses a <= check for the cascade number for legality, but the assert was checking for <. For equal cascade numbers for an urgent eviction, canEvictInterferenceBasedOnCost could return success. The actual eviction would then hit this assert. Avoid ever returning true for equivalent cascade numbers. The resulting failed allocation seems a bit off to me. e.g. in illegal-eviction-assert.mir, I wuold assume %0 gets allocated starting at $vgpr0. That was its initial allocation choice, but was later evicted. In this example no evictions can help improve anything.
38 lines
1.8 KiB
YAML
38 lines
1.8 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
|
|
# RUN: not llc -march=amdgcn -mcpu=gfx900 -start-before=greedy,0 -stop-after=virtregrewriter,1 -o - 2>%t.err %s | FileCheck %s
|
|
# RUN: FileCheck -check-prefix=ERR %s < %t.err
|
|
|
|
# This testcase cannot be compiled. An attempted eviction legality
|
|
# check was inconsistent with a later assertion when the eviction was
|
|
# performed.
|
|
|
|
# ERR: error: ran out of registers during register allocation
|
|
|
|
--- |
|
|
define void @foo() #0 {
|
|
ret void
|
|
}
|
|
|
|
attributes #0 = { "amdgpu-waves-per-eu"="8,8" }
|
|
|
|
...
|
|
|
|
# CHECK: S_NOP 0, implicit-def renamable $vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15_vgpr16_vgpr17_vgpr18_vgpr19, implicit-def renamable $vgpr20_vgpr21_vgpr22_vgpr23_vgpr24_vgpr25_vgpr26_vgpr27, implicit-def renamable $vgpr0_vgpr1_vgpr2_vgpr3, implicit-def renamable $vgpr28_vgpr29_vgpr30_vgpr31, implicit-def renamable $vgpr0_vgpr1_vgpr2_vgpr3
|
|
# CHECK: S_NOP 0, implicit killed renamable $vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9_vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15_vgpr16_vgpr17_vgpr18_vgpr19, implicit killed renamable $vgpr20_vgpr21_vgpr22_vgpr23_vgpr24_vgpr25_vgpr26_vgpr27, implicit killed renamable $vgpr0_vgpr1_vgpr2_vgpr3, implicit killed renamable $vgpr28_vgpr29_vgpr30_vgpr31, implicit killed renamable $vgpr0_vgpr1_vgpr2_vgpr3
|
|
|
|
---
|
|
name: foo
|
|
tracksRegLiveness: true
|
|
machineFunctionInfo:
|
|
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
|
|
frameOffsetReg: '$sgpr33'
|
|
stackPtrOffsetReg: '$sgpr32'
|
|
body: |
|
|
bb.0:
|
|
S_NOP 0, implicit-def %0:vreg_512, implicit-def %1:vreg_256, implicit-def %2:vreg_128, implicit-def %3:vreg_128, implicit-def %4:vreg_128
|
|
|
|
S_NOP 0, implicit %0, implicit %1, implicit %2, implicit %3, implicit %4
|
|
S_ENDPGM 0
|
|
|
|
...
|