04db60d150
foldOperands() for REG_SEQUENCE has recursion that can trigger an infinite loop as the method can modify the operand order, which messes up the range-based for loop. This patch fixes the issue by caching the uses for processing beforehand, and then iterating over the cache rather using the instruction iterator.
19 lines
591 B
YAML
19 lines
591 B
YAML
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -run-pass=si-fold-operands -verify-machineinstrs -o - %s
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---
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name: fold_reg_sequence
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body: |
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bb.0:
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liveins: $vgpr0_vgpr1, $vgpr2
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%0:sreg_32 = S_MOV_B32 0
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%1:sreg_32 = S_MOV_B32 429
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%2:sreg_64 = REG_SEQUENCE killed %1, %subreg.sub0, %0, %subreg.sub1
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%3:vgpr_32 = V_MUL_HI_U32_e64 $vgpr2, %2.sub0, implicit $exec
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%4:vgpr_32 = GLOBAL_LOAD_DWORD $vgpr0_vgpr1, 0, 0, implicit $exec :: (load (s32), addrspace 1)
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%5:vgpr_32 = V_MUL_HI_U32_e64 %4, %2.sub0, implicit $exec
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S_ENDPGM 0
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...
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