derek.holloway
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100 lines
2.6 KiB
YAML
100 lines
2.6 KiB
YAML
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# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass machine-cp -verify-machineinstrs -o - %s | FileCheck %s
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--- |
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define i32 @copyprop1(i32 %a, i32 %b) { ret i32 %a }
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define i32 @copyprop2(i32 %a, i32 %b) { ret i32 %a }
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define i32 @copyprop3(i32 %a, i32 %b) { ret i32 %a }
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define i32 @copyprop4(i32 %a, i32 %b) { ret i32 %a }
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define i32 @copyprop5(i32 %a, i32 %b) { ret i32 %a }
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define i32 @copyprop6(i32 %a, i32 %b) { ret i32 %a }
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declare i32 @foo(i32)
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...
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---
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# The first copy is dead copy which is not used.
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# CHECK-LABEL: name: copyprop1
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# CHECK: bb.0:
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# CHECK-NOT: $w20 = COPY
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name: copyprop1
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body: |
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bb.0:
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liveins: $w0, $w1
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$w20 = COPY $w1
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BL @foo, csr_aarch64_aapcs, implicit $w0, implicit-def $w0
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RET_ReallyLR implicit $w0
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...
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---
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# The first copy is not a dead copy which is used in the second copy after the
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# call.
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# CHECK-LABEL: name: copyprop2
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# CHECK: bb.0:
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# CHECK: $w20 = COPY
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name: copyprop2
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body: |
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bb.0:
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liveins: $w0, $w1
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$w20 = COPY $w1
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BL @foo, csr_aarch64_aapcs, implicit $w0, implicit-def $w0
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$w0 = COPY $w20
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RET_ReallyLR implicit $w0
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...
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---
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# Both the first and second copy are dead copies which are not used.
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# CHECK-LABEL: name: copyprop3
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# CHECK: bb.0:
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# CHECK-NOT: COPY
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name: copyprop3
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body: |
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bb.0:
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liveins: $w0, $w1
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$w20 = COPY $w1
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BL @foo, csr_aarch64_aapcs, implicit $w0, implicit-def $w0
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$w20 = COPY $w0
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RET_ReallyLR implicit $w0
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...
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# The second copy is removed as a NOP copy, after then the first copy become
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# dead which should be removed as well.
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# CHECK-LABEL: name: copyprop4
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# CHECK: bb.0:
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# CHECK-NOT: COPY
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name: copyprop4
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body: |
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bb.0:
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liveins: $w0, $w1
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$w20 = COPY $w0
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$w0 = COPY $w20
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BL @foo, csr_aarch64_aapcs, implicit $w0, implicit-def $w0
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RET_ReallyLR implicit $w0
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...
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# Don't try to erase any COPY which overlaps itself.
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# CHECK-LABEL: name: copyprop5
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# CHECK: bb.0:
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# CHECK: COPY killed $q26_q27_q28_q29
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# CHECK: COPY killed $q28_q29_q30_q31
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name: copyprop5
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body: |
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bb.0:
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liveins: $q26_q27_q28_q29
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$q28_q29_q30_q31 = COPY killed $q26_q27_q28_q29
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$q26_q27_q28_q29 = COPY killed $q28_q29_q30_q31
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BL @foo, csr_aarch64_aapcs, implicit killed $q26_q27_q28_q29
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RET_ReallyLR
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...
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# Don't try to analyze any COPY which overlaps itself.
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# CHECK-LABEL: name: copyprop6
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# CHECK: bb.0:
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# CHECK: COPY killed $q26_q27_q28_q29
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# CHECK: $q30 = COPY $q28
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name: copyprop6
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body: |
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bb.0:
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liveins: $q26_q27_q28_q29
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$q28_q29_q30_q31 = COPY killed $q26_q27_q28_q29
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$q30 = COPY $q28
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BL @foo, csr_aarch64_aapcs, implicit killed $q28_q29_q30_q31
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RET_ReallyLR
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...
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