101 lines
3.1 KiB
LLVM
101 lines
3.1 KiB
LLVM
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; RUN: llc -mtriple=aarch64 %s -o - | FileCheck %s
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; RUN: llc -mtriple=aarch64 -function-sections %s -o - | FileCheck %s
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; RUN: llc -mtriple=aarch64 -no-integrated-as %s -o - | FileCheck --check-prefix=NOLINK %s
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;; GNU as < 2.35 did not support section flag 'o'.
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; NOLINK-NOT: "awo"
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define i32 @f0() "patchable-function-entry"="0" {
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; CHECK-LABEL: f0:
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; CHECK-NEXT: .Lfunc_begin0:
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; CHECK-NOT: nop
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; CHECK: mov w0, wzr
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; CHECK-NOT: .section __patchable_function_entries
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ret i32 0
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}
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define i32 @f1() "patchable-function-entry"="1" {
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; CHECK-LABEL: f1:
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; CHECK-NEXT: .Lfunc_begin1:
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; CHECK: nop
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; CHECK-NEXT: mov w0, wzr
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f1{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Lfunc_begin1
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ret i32 0
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}
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;; Without -function-sections, f2 is in the same text section as f1.
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;; They share the __patchable_function_entries section.
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;; With -function-sections, f1 and f2 are in different text sections.
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;; Use separate __patchable_function_entries.
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define void @f2() "patchable-function-entry"="2" {
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; CHECK-LABEL: f2:
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; CHECK-NEXT: .Lfunc_begin2:
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; CHECK-COUNT-2: nop
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; CHECK-NEXT: ret
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f2{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Lfunc_begin2
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ret void
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}
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$f3 = comdat any
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define void @f3() "patchable-function-entry"="3" comdat {
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; CHECK-LABEL: f3:
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; CHECK-NEXT: .Lfunc_begin3:
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; CHECK-COUNT-3: nop
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; CHECK-NEXT: ret
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; CHECK: .section __patchable_function_entries,"aGwo",@progbits,f3,comdat,f3{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Lfunc_begin3
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ret void
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}
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$f5 = comdat any
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define void @f5() "patchable-function-entry"="5" comdat {
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; CHECK-LABEL: f5:
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; CHECK-NEXT: .Lfunc_begin4:
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; CHECK-COUNT-5: nop
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; CHECK-NEXT: sub sp, sp, #16
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; CHECK: .section __patchable_function_entries,"aGwo",@progbits,f5,comdat,f5{{$}}
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; CHECK: .p2align 3
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; CHECK-NEXT: .xword .Lfunc_begin4
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%frame = alloca i8, i32 16
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ret void
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}
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;; -fpatchable-function-entry=3,2
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;; "patchable-function-prefix" emits data before the function entry label.
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define void @f3_2() "patchable-function-entry"="1" "patchable-function-prefix"="2" {
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; CHECK-LABEL: .type f3_2,@function
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; CHECK-NEXT: .Ltmp1: // @f3_2
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK-NEXT: f3_2:
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; CHECK: // %bb.0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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;; .size does not include the prefix.
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; CHECK: .Lfunc_end5:
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; CHECK-NEXT: .size f3_2, .Lfunc_end5-f3_2
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f3_2{{$}}
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; CHECK: .p2align 3
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; CHECK-NEXT: .xword .Ltmp1
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ret void
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}
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;; When prefix data is used, arbitrarily place NOPs after prefix data.
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define void @prefix() "patchable-function-entry"="0" "patchable-function-prefix"="1" prefix i32 1 {
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; CHECK-LABEL: .type prefix,@function
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; CHECK-NEXT: .word 1 // @prefix
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; CHECK: .Ltmp2:
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; CHECK: nop
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; CHECK-NEXT: prefix:
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;; Emit a __patchable_function_entries entry even if "patchable-function-entry" is 0.
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; CHECK: .section __patchable_function_entries,"awo",@progbits,prefix{{$}}
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; CHECK: .p2align 3
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; CHECK-NEXT: .xword .Ltmp2
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ret void
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}
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