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https://github.com/RPCS3/llvm-mirror.git
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bb3ea20b55
Planning to add support for named vregs. This puts is in a conundrum since physregs are named as well. To rectify this we need to use a sigil other than '%' for physregs in MIR. We've settled on using '$' for physregs but first we must repurpose it from external symbols using it, which is what this commit is all about. We think '&' will have familiar semantics for C/C++ users. llvm-svn: 322146
184 lines
4.5 KiB
YAML
184 lines
4.5 KiB
YAML
# RUN: llc -mtriple=aarch64--linux-gnu -run-pass=aarch64-ldst-opt %s -verify-machineinstrs -o - | FileCheck %s
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---
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name: promote-load-from-store
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %w1, %x0, %lr
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STRWui killed %w1, %x0, 0 :: (store 4)
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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%w0 = LDRHHui killed %x0, 1 :: (load 2)
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RET %lr, implicit %w0
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...
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# Don't count transient instructions towards search limits.
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# CHECK-LABEL: name: promote-load-from-store
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# CHECK: STRWui %w1
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# CHECK: UBFMWri killed %w1
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---
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name: store-pair
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %w1, %x0, %lr
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STRWui %w1, %x0, 0 :: (store 4)
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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CFI_INSTRUCTION 0
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STRWui killed %w1, killed %x0, 1 :: (store 4)
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RET %lr
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...
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# CHECK-LABEL: name: store-pair
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# CHECK: STPWi
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---
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name: store-pair-clearkill0
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %w1, %x0, %lr
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STRWui %w1, %x0, 0 :: (store 4)
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%w2 = COPY %w1
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%x3 = COPY %x0
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STRWui killed %w1, killed %x0, 1 :: (store 4)
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RET %lr
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...
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# When merging a lower store with an upper one, we must clear kill flags on
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# the lower store.
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# CHECK-LABEL: store-pair-clearkill0
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# CHECK-NOT: STPWi %w1, killed %w1, %x0, 0 :: (store 4)
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# CHECK: STPWi %w1, %w1, %x0, 0 :: (store 4)
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# CHECK: %w2 = COPY %w1
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# CHECK: RET %lr
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---
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name: store-pair-clearkill1
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %x0, %lr
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%w1 = MOVi32imm 13
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%w2 = MOVi32imm 7
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STRWui %w1, %x0, 1 :: (store 4)
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%w2 = COPY killed %w1
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STRWui killed %w2, %x0, 0 :: (store 4)
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%w1 = MOVi32imm 42
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%w2 = MOVi32imm 7
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STRWui %w1, %x0, 0 :: (store 4)
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%w2 = COPY killed %w1
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STRWui killed %w2, killed %x0, 1 :: (store 4)
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RET %lr
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...
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# When merging an upper store with a lower one, kill flags along the way need
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# to be removed; In this case the kill flag on %w1.
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# CHECK-LABEL: store-pair-clearkill1
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# CHECK: %w1 = MOVi32imm
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# CHECK: %w2 = MOVi32imm
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# CHECK-NOT: %w2 = COPY killed %w1
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# CHECK: %w2 = COPY %w1
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# CHECK: STPWi killed %w2, %w1, %x0, 0
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# CHECK: %w1 = MOVi32imm
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# CHECK: %w2 = MOVi32imm
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# CHECK-NOT: %w2 = COPY killed %w1
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# CHECK: %w2 = COPY %w1
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# CHECK: STPWi %w1, killed %w2, killed %x0, 0
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---
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name: store-load-clearkill
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %w1
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STRWui %w1, %sp, 0 :: (store 4)
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%wzr = COPY killed %w1 ; killing use of %w1
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%w11 = LDRWui %sp, 0 :: (load 4)
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HINT 0, implicit %w11 ; some use of %w11
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...
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# When replaceing the load of a store-load pair with a copy the kill flags
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# along the way need to be cleared.
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# CHECK-LABEL: name: store-load-clearkill
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# CHECK: STRWui %w1, %sp, 0 :: (store 4)
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# CHECK-NOT: COPY killed %w1
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# CHECK: %wzr = COPY %w1
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# CHECK: %w11 = ORRWrs %wzr, %w1, 0
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# CHECK: HINT 0, implicit %w11
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---
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name: promote-load-from-store-undef
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %x0, %x2, %lr
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STRWui undef %w1, %x0, 0 :: (store 4)
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%w0 = LDRBBui %x0, 1 :: (load 2)
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STRHHui undef %w3, %x2, 0 :: (store 4)
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%w1 = LDRBBui %x2, 0 :: (load 4)
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RET %lr, implicit %w0
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...
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# CHECK-LABEL: name: promote-load-from-store-undef
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# CHECK: STRWui undef %w1
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# CHECK: UBFMWri undef %w1
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# CHECK: STRHHui undef %w3
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# CHECK: ANDWri undef %w3
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---
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name: promote-load-from-store-trivial-kills
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: %x0, %lr
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STRXui %x0, %sp, 0 :: (store 8)
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STRXui killed %x0, %sp, 2 :: (store 8)
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%x0 = LDRXui %sp, 0 :: (load 8)
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BL &bar, csr_aarch64_aapcs, implicit-def %lr, implicit %sp, implicit %x0, implicit-def %sp
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RET %lr
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...
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# CHECK-LABEL: name: promote-load-from-store-trivial-kills
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# CHECK: STRXui %x0, %sp, 0
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# CHECK: STRXui %x0, %sp, 2
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# CHECK-NOT: LDRXui
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# CHECK-NOT: ORR
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# CHECK: BL &bar, csr_aarch64_aapcs, implicit-def %lr, implicit %sp, implicit %x0, implicit-def %sp
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