derek.holloway
7502bf64a4
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105 lines
3.1 KiB
LLVM
105 lines
3.1 KiB
LLVM
; RUN: llc -mtriple=aarch64 -aarch64-min-jump-table-entries=4 %s -o - | FileCheck %s
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define void @f0() "patchable-function-entry"="0" "branch-target-enforcement" {
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; CHECK-LABEL: f0:
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; CHECK-NEXT: .Lfunc_begin0:
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; CHECK: // %bb.0:
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; CHECK-NEXT: hint #34
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; CHECK-NEXT: ret
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; CHECK-NOT: .section __patchable_function_entries
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ret void
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}
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;; -fpatchable-function-entry=1 -mbranch-protection=bti
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;; For M=0, place the label .Lpatch0 after the initial BTI.
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define void @f1() "patchable-function-entry"="1" "branch-target-enforcement" {
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; CHECK-LABEL: f1:
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; CHECK-NEXT: .Lfunc_begin1:
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: // %bb.0:
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; CHECK-NEXT: hint #34
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; CHECK-NEXT: .Lpatch0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f1{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Lpatch0
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ret void
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}
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;; -fpatchable-function-entry=2,1 -mbranch-protection=bti
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define void @f2_1() "patchable-function-entry"="1" "patchable-function-prefix"="1" "branch-target-enforcement" {
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; CHECK-LABEL: .type f2_1,@function
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: f2_1:
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; CHECK-NEXT: .Lfunc_begin2:
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: // %bb.0:
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; CHECK-NEXT: hint #34
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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; CHECK: .Lfunc_end2:
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; CHECK-NEXT: .size f2_1, .Lfunc_end2-f2_1
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f2_1{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Ltmp0
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ret void
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}
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;; -fpatchable-function-entry=1 -mbranch-protection=bti
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;; We don't add BTI c, because the function has internal linkage
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define internal void @f1i(i64 %v) "patchable-function-entry"="1" "branch-target-enforcement" {
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; CHECK-LABEL: f1i:
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; CHECK-NEXT: .Lfunc_begin3:
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; CHECK: // %bb.0:
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; CHECK-NEXT: nop
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;; Other basic blocks have BTI, but they don't affect our decision to not create .Lpatch0
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; CHECK: .LBB{{.+}} // %sw.bb1
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; CHECK-NEXT: hint #36
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f1i{{$}}
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; CHECK-NEXT: .p2align 3
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; CHECK-NEXT: .xword .Lfunc_begin3
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entry:
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switch i64 %v, label %sw.bb0 [
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i64 1, label %sw.bb1
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i64 2, label %sw.bb2
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i64 3, label %sw.bb3
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i64 4, label %sw.bb4
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]
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sw.bb0:
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call void asm sideeffect "nop", ""()
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ret void
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sw.bb1:
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call void asm sideeffect "", ""()
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ret void
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sw.bb2:
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call void asm sideeffect "", ""()
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ret void
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sw.bb3:
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call void asm sideeffect "", ""()
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ret void
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sw.bb4:
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call void asm sideeffect "", ""()
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ret void
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}
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;; Test the interaction with -fsanitize=function.
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; CHECK: .type sanitize_function,@function
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; CHECK-NEXT: .Ltmp{{.*}}:
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; CHECK-NEXT: nop
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; CHECK-NEXT: .word 3238382334 // 0xc105cafe
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; CHECK-NEXT: .word 42
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; CHECK-NEXT: sanitize_function:
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; CHECK-NEXT: .Lfunc_begin{{.*}}:
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: // %bb.0:
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; CHECK-NEXT: hint #34
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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define void @sanitize_function(ptr noundef %x) "patchable-function-prefix"="1" "patchable-function-entry"="1" "branch-target-enforcement" !func_sanitize !0 {
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ret void
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}
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!0 = !{i32 3238382334, i32 42}
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