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