derek.holloway
7502bf64a4
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86 lines
2.6 KiB
LLVM
86 lines
2.6 KiB
LLVM
; RUN: llc -mtriple=aarch64-pc-windows-msvc %s -o - | FileCheck %s
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define dso_local void @normal_call() local_unnamed_addr section "nc_sect" {
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entry:
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call void @a()
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call void @a()
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ret void
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}
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; CHECK-LABEL: normal_call:
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; CHECK: adrp [[ADRPREG:x[0-9]+]], __imp_a
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; CHECK-NEXT: ldr [[LDRREG:x[0-9]+]], [[[ADRPREG]], :lo12:__imp_a]
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; CHECK-NEXT: .Limpcall0:
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; CHECK-NEXT: blr [[LDRREG]]
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; CHECK-NEXT: .Limpcall1:
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; CHECK-NEXT: blr [[LDRREG]]
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define dso_local void @tail_call() local_unnamed_addr section "tc_sect" {
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entry:
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tail call void @b()
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ret void
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}
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; CHECK-LABEL: tail_call:
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; CHECK: adrp [[ADRPREG:x[0-9]+]], __imp_b
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; CHECK-NEXT: ldr [[LDRREG:x[0-9]+]], [[[ADRPREG]], :lo12:__imp_b]
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; CHECK-NEXT: .Limpcall2:
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; CHECK-NEXT: br [[LDRREG]]
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; Regression test: branch folding would notice that both of these calls become
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; branch instructions to the same register and would fold them. However, import
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; call optimization requires them to remain separate as they are for different
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; functions.
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define dso_local void @call_one_or_other(i32 %val) local_unnamed_addr {
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%is_zero = icmp eq i32 %val, 0
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br i1 %is_zero, label %call_a, label %call_b
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call_a:
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call void @a()
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br label %finish
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call_b:
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call void @b()
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br label %finish
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finish:
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ret void
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}
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; CHECK-LABEL: call_one_or_other:
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; CHECK: adrp [[ADRPREG:x[0-9]+]], __imp_b
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; CHECK-NEXT: ldr [[LDRREG:x[0-9]+]], [[[ADRPREG]], :lo12:__imp_b]
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; CHECK-NEXT: .Limpcall3:
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; CHECK-NEXT: blr [[LDRREG]]
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; CHECK: adrp [[ADRPREG:x[0-9]+]], __imp_a
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; CHECK-NEXT: ldr [[LDRREG:x[0-9]+]], [[[ADRPREG]], :lo12:__imp_a]
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; CHECK-NEXT: .Limpcall4:
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; CHECK-NEXT: blr [[LDRREG]]
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declare dllimport void @a() local_unnamed_addr
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declare dllimport void @b() local_unnamed_addr
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; CHECK-LABEL: .section .impcall,"yi"
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; CHECK-NEXT: .asciz "Imp_Call_V1"
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; CHECK-NEXT: .word 32
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; CHECK-NEXT: .secnum nc_sect
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; CHECK-NEXT: .word 19
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; CHECK-NEXT: .secoffset .Limpcall0
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; CHECK-NEXT: .symidx __imp_a
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; CHECK-NEXT: .word 19
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; CHECK-NEXT: .secoffset .Limpcall1
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; CHECK-NEXT: .symidx __imp_a
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; CHECK-NEXT: .word 20
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; CHECK-NEXT: .secnum tc_sect
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; CHECK-NEXT: .word 19
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; CHECK-NEXT: .secoffset .Limpcall2
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; CHECK-NEXT: .symidx __imp_b
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; CHECK-NEXT: .word 32
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; CHECK-NEXT: .secnum .text
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; CHECK-NEXT: .word 19
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; CHECK-NEXT: .secoffset .Limpcall3
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; CHECK-NEXT: .symidx __imp_b
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; CHECK-NEXT: .word 19
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; CHECK-NEXT: .secoffset .Limpcall4
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; CHECK-NEXT: .symidx __imp_a
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"import-call-optimization", i32 1}
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