blob: 32b4f158a011c31fc792444ab0ebc25f0e60e0b4 [file] [log] [blame]
# RUN: llc -mtriple=amdgcn-amd-amdhsa-opencl -verify-machineinstrs -stress-regalloc=1 -start-before=simple-register-coalescing -stop-after=greedy -o - %s | FileCheck %s
# https://bugs.llvm.org/show_bug.cgi?id=33620
---
# This would assert due to the empty live interval created for %9
# on the last S_NOP with an undef subreg use.
# CHECK-LABEL: name: expecting_non_empty_interval
# CHECK: undef %7.sub1:vreg_64 = V_MAC_F32_e32 0, undef %1:vgpr_32, undef %7.sub1, implicit $exec
# CHECK-NEXT: SI_SPILL_V64_SAVE %7, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr5, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
# CHECK-NEXT: undef %5.sub1:vreg_64 = V_MOV_B32_e32 1786773504, implicit $exec
# CHECK-NEXT: dead %2:vgpr_32 = V_MUL_F32_e32 0, %5.sub1, implicit $exec
# CHECK: S_NOP 0, implicit %6.sub1
# CHECK-NEXT: %8:vreg_64 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr5, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
# CHECK-NEXT: S_NOP 0, implicit %8.sub1
# CHECK-NEXT: S_NOP 0, implicit undef %9.sub0
name: expecting_non_empty_interval
tracksRegLiveness: true
registers:
- { id: 0, class: vreg_64, preferred-register: '' }
- { id: 1, class: vgpr_32, preferred-register: '' }
- { id: 2, class: vgpr_32, preferred-register: '' }
- { id: 3, class: vreg_64, preferred-register: '' }
body: |
bb.0:
successors: %bb.1
undef %0.sub1 = V_MAC_F32_e32 0, undef %1, undef %0.sub1, implicit $exec
undef %3.sub1 = V_MOV_B32_e32 1786773504, implicit $exec
dead %2 = V_MUL_F32_e32 0, %3.sub1, implicit $exec
bb.1:
S_NOP 0, implicit %3.sub1
S_NOP 0, implicit %0.sub1
S_NOP 0, implicit undef %0.sub0
...
# Similar assert which happens when trying to rematerialize.
# https://bugs.llvm.org/show_bug.cgi?id=33884
---
# CHECK-LABEL: name: rematerialize_empty_interval_has_reference
# CHECK-NOT: MOV
# CHECK: undef %3.sub2:vreg_128 = V_MOV_B32_e32 1786773504, implicit $exec
# CHECK: bb.1:
# CHECK-NEXT: S_NOP 0, implicit %3.sub2
# CHECK-NEXT: S_NOP 0, implicit undef %6.sub0
# CHECK-NEXT: undef %4.sub2:vreg_128 = V_MOV_B32_e32 0, implicit $exec
# CHECK-NEXT: S_NOP 0, implicit %4.sub2
name: rematerialize_empty_interval_has_reference
tracksRegLiveness: true
registers:
- { id: 0, class: vreg_128, preferred-register: '' }
- { id: 1, class: vgpr_32, preferred-register: '' }
- { id: 2, class: vgpr_32, preferred-register: '' }
- { id: 3, class: vreg_128, preferred-register: '' }
body: |
bb.0:
successors: %bb.1
undef %0.sub2 = V_MOV_B32_e32 0, implicit $exec
undef %3.sub2 = V_MOV_B32_e32 1786773504, implicit $exec
bb.1:
S_NOP 0, implicit %3.sub2
S_NOP 0, implicit undef %0.sub0
S_NOP 0, implicit %0.sub2
...