228 lines
6.4 KiB
YAML
228 lines
6.4 KiB
YAML
# RUN: llc -march=x86 -run-pass machine-cp -verify-machineinstrs -o - %s | FileCheck %s
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--- |
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declare void @foo()
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define void @copyprop_remove_kill0() { ret void }
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define void @copyprop_remove_kill1() { ret void }
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define void @copyprop_remove_kill2() { ret void }
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define void @copyprop0() { ret void }
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define void @copyprop1() { ret void }
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define void @copyprop2() { ret void }
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define void @nocopyprop0() { ret void }
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define void @nocopyprop1() { ret void }
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define void @nocopyprop2() { ret void }
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define void @nocopyprop3() { ret void }
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define void @nocopyprop4() { ret void }
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define void @nocopyprop5() { ret void }
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...
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---
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# The second copy is redundant and will be removed, check that we also remove
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# the kill flag of intermediate instructions.
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# CHECK-LABEL: name: copyprop_remove_kill0
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rdi
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# CHECK-NEXT: NOOP implicit %rdi
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# CHECK-NOT: COPY
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop_remove_kill0
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rdi
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NOOP implicit killed %rdi
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%rdi = COPY %rax
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NOOP implicit %rax, implicit %rdi
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...
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---
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# The second copy is redundant and will be removed, check that we also remove
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# the kill flag of intermediate instructions.
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# CHECK-LABEL: name: copyprop_remove_kill1
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rdi
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# CHECK-NEXT: NOOP implicit %edi
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# CHECK-NOT: COPY
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop_remove_kill1
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rdi
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NOOP implicit killed %edi
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%rdi = COPY %rax
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NOOP implicit %rax, implicit %rdi
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...
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---
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# The second copy is redundant and will be removed, check that we also remove
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# the kill flag of intermediate instructions.
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# CHECK-LABEL: name: copyprop_remove_kill2
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# CHECK: bb.0:
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# CHECK-NEXT: %ax = COPY %di
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# CHECK-NEXT: NOOP implicit %rdi
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# CHECK-NOT: COPY
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop_remove_kill2
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allVRegsAllocated: true
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body: |
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bb.0:
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%ax = COPY %di
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NOOP implicit killed %rdi
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%di = COPY %ax
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NOOP implicit %rax, implicit %rdi
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...
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---
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# The second copy is redundant; the call preserves the source and dest register.
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# CHECK-LABEL: name: copyprop0
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rdi
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64_rt_mostregs
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# CHECK-NEXT: NOOP implicit %edi
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# CHECK-NOT: COPY
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop0
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rdi
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CALL64pcrel32 @foo, csr_64_rt_mostregs
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NOOP implicit killed %edi
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%rdi = COPY %rax
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NOOP implicit %rax, implicit %rdi
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...
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---
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# The 2nd copy is redundant; The call preserves the source and dest register.
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# CHECK-LABEL: name: copyprop1
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rdi
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# CHECK-NEXT: NOOP implicit %rax
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop1
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rdi
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NOOP implicit killed %rax
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%rax = COPY %rdi
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NOOP implicit %rax, implicit %rdi
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...
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---
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# CHECK-LABEL: name: copyprop2
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rdi
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# CHECK-NEXT: NOOP implicit %ax
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64_rt_mostregs
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# CHECK-NOT: %rax = COPY %rdi
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# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
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name: copyprop2
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rdi
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NOOP implicit killed %ax
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CALL64pcrel32 @foo, csr_64_rt_mostregs
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%rax = COPY %rdi
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NOOP implicit %rax, implicit %rdi
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...
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---
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# The second copy is not redundant if the source register (%rax) is clobbered
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# even if the dest (%rbp) is not.
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# CHECK-LABEL: name: nocopyprop0
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rbp
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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# CHECK-NEXT: %rbp = COPY %rax
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# CHECK-NEXT: NOOP implicit %rax, implicit %rbp
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name: nocopyprop0
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rbp
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CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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%rbp = COPY %rax
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NOOP implicit %rax, implicit %rbp
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...
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---
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# The second copy is not redundant if the dest register (%rax) is clobbered
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# even if the source (%rbp) is not.
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# CHECK-LABEL: name: nocopyprop1
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# CHECK: bb.0:
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# CHECK-NEXT: %rbp = COPY %rax
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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# CHECK-NEXT: %rax = COPY %rbp
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# CHECK-NEXT: NOOP implicit %rax, implicit %rbp
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name: nocopyprop1
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allVRegsAllocated: true
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body: |
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bb.0:
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%rbp = COPY %rax
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CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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%rax = COPY %rbp
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NOOP implicit %rax, implicit %rbp
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...
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---
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# The second copy is not redundant if the source register (%rax) is clobbered
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# even if the dest (%rbp) is not.
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# CHECK-LABEL: name: nocopyprop2
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rbp
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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# CHECK-NEXT: %rax = COPY %rbp
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# CHECK-NEXT: NOOP implicit %rax, implicit %rbp
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name: nocopyprop2
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rbp
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CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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%rax = COPY %rbp
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NOOP implicit %rax, implicit %rbp
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...
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---
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# The second copy is not redundant if the dest register (%rax) is clobbered
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# even if the source (%rbp) is not.
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# CHECK-LABEL: name: nocopyprop3
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# CHECK: bb.0:
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# CHECK-NEXT: %rbp = COPY %rax
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# CHECK-NEXT: CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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# CHECK-NEXT: %rbp = COPY %rax
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# CHECK-NEXT: NOOP implicit %rax, implicit %rbp
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name: nocopyprop3
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allVRegsAllocated: true
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body: |
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bb.0:
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%rbp = COPY %rax
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CALL64pcrel32 @foo, csr_64, implicit %rax, implicit %rbp
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%rbp = COPY %rax
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NOOP implicit %rax, implicit %rbp
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...
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---
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# A reserved register may change its value so the 2nd copy is not redundant.
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# CHECK-LABEL: name: nocopyprop4
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# CHECK: bb.0:
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# CHECK-NEXT: %rax = COPY %rip
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# CHECK-NEXT: NOOP implicit %rax
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# CHECK-NEXT: %rax = COPY %rip
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# CHECK-NEXT: NOOP implicit %rax
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name: nocopyprop4
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allVRegsAllocated: true
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body: |
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bb.0:
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%rax = COPY %rip
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NOOP implicit %rax
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%rax = COPY %rip
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NOOP implicit %rax
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...
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---
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# Writing to a reserved register may have additional effects (slightly illegal
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# testcase because writing to %rip like this should make the instruction a jump)
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# CHECK-LABEL: name: nocopyprop5
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# CHECK: bb.0:
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# CHECK-NEXT: %rip = COPY %rax
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# CHECK-NEXT: %rip = COPY %rax
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name: nocopyprop5
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allVRegsAllocated: true
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body: |
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bb.0:
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%rip = COPY %rax
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%rip = COPY %rax
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...
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