20 lines
603 B
Plaintext
20 lines
603 B
Plaintext
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# RUN: llc -o - -mtriple=x86_64-- -run-pass=regallocfast %s | FileCheck %s
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# Fast regalloc used to not collect physical register definitions
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# before walking and assigning the virtual definition.
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# Therefore it was possible for a virtual definition to end up
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# using the same register as a later (in terms of operand list) physical
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# register.
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# Check this does not happen.
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#
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# PR41790
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---
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name: instruction_with_1virtreg_1physreg_defs
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tracksRegLiveness: true
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body: |
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bb.0:
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; CHECK-NOT: $rax = KILL implicit-def dead $rax
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%0:gr64 = KILL implicit-def dead $rax
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KILL killed %0
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RET 0
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...
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