derek.holloway
7502bf64a4
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63 lines
2.2 KiB
YAML
63 lines
2.2 KiB
YAML
# RUN: llc -mtriple=aarch64 -o - %s \
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# RUN: -run-pass dead-mi-elimination | FileCheck %s
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# RUN: llc -mtriple=aarch64 -o - %s -p dead-mi-elimination | FileCheck %s
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--- |
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@c = internal unnamed_addr global [3 x i8] zeroinitializer, align 4
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@d = common dso_local local_unnamed_addr global i32 0, align 4
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define dso_local i32 @main() local_unnamed_addr {
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%scevgep = getelementptr i8, ptr getelementptr inbounds ([3 x i8], ptr @c, i64 0, i64 1), i64 0
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ret i32 0
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}
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...
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---
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name: main
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tracksRegLiveness: true
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registers:
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- { id: 0, class: gpr64common, preferred-register: '' }
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- { id: 1, class: gpr64common, preferred-register: '' }
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- { id: 2, class: gpr64, preferred-register: '' }
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- { id: 3, class: gpr64common, preferred-register: '' }
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- { id: 4, class: gpr32, preferred-register: '' }
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- { id: 5, class: gpr32all, preferred-register: '' }
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- { id: 6, class: gpr64common, preferred-register: '' }
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body: |
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bb.0:
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successors: %bb.4(0x30000000), %bb.5(0x50000000)
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%0:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
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CBZX killed %0, %bb.4
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B %bb.5
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bb.1:
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successors: %bb.3(0x04000000), %bb.2(0x7c000000)
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%1:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
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%2:gpr64 = SUBSXri %1, 2, 0, implicit-def $nzcv
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Bcc 0, %bb.3, implicit $nzcv
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B %bb.2
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bb.2:
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successors: %bb.1(0x80000000)
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%3:gpr64common = ADDXrr %6, %2
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%4:gpr32 = LDRBBui killed %3, 1 :: (load (s8) from %ir.scevgep)
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%5:gpr32all = COPY %4
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B %bb.1
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bb.3:
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ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
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$x0 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
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ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
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RET_ReallyLR implicit $w0
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bb.4:
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successors: %bb.5(0x80000000)
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bb.5:
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successors: %bb.1(0x80000000)
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; CHECK: bb.5
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; CHECK-NOT: %6:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
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%6:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
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B %bb.1
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...
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