184 lines
4.5 KiB
Plaintext
184 lines
4.5 KiB
Plaintext
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# 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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