forked from OSchip/llvm-project
89 lines
2.7 KiB
LLVM
89 lines
2.7 KiB
LLVM
; RUN: llc -mtriple=i686 %s -o - | FileCheck --check-prefixes=CHECK,32 %s
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; RUN: llc -mtriple=x86_64 %s -o - | FileCheck --check-prefixes=CHECK,64 %s
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;; -fpatchable-function-entry=0 -fcf-protection=branch
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define void @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-NEXT: .cfi_startproc
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; CHECK-NEXT: # %bb.0:
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; 32-NEXT: endbr32
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; 64-NEXT: endbr64
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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 -fcf-protection=branch
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;; For M=0, place the label .Lpatch0 after the initial ENDBR.
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;; .cfi_startproc should be placed at the function entry.
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define void @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-NEXT: .cfi_startproc
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; CHECK-NEXT: # %bb.0:
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; 32-NEXT: endbr32
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; 64-NEXT: endbr64
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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{{$}}
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; 32-NEXT: .p2align 2
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; 32-NEXT: .long .Lpatch0
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; 64-NEXT: .p2align 3
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; 64-NEXT: .quad .Lpatch0
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ret void
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}
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;; -fpatchable-function-entry=2,1 -fcf-protection=branch
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define void @f2_1() "patchable-function-entry"="1" "patchable-function-prefix"="1" {
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; CHECK-LABEL: .type f2_1,@function
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: f2_1:
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; CHECK-NEXT: .Lfunc_begin2:
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: # %bb.0:
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; 32-NEXT: endbr32
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; 64-NEXT: endbr64
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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; CHECK: .Lfunc_end2:
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; CHECK-NEXT: .size f2_1, .Lfunc_end2-f2_1
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f2_1{{$}}
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; 32-NEXT: .p2align 2
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; 32-NEXT: .long .Ltmp0
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; 64-NEXT: .p2align 3
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; 64-NEXT: .quad .Ltmp0
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ret void
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}
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;; -fpatchable-function-entry=1 -fcf-protection=branch
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;; For M=0, don't create .Lpatch0 if the initial instruction is not ENDBR,
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;; even if other basic blocks may have ENDBR.
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@buf = internal global [5 x i8*] zeroinitializer
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declare i32 @llvm.eh.sjlj.setjmp(i8*)
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define internal void @f1i() "patchable-function-entry"="1" {
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; CHECK-LABEL: f1i:
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; CHECK-NEXT: .Lfunc_begin3:
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: nop
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; CHECK-NOT: .Lpatch0:
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;; Another basic block has ENDBR, but it doesn't affect our decision to not create .Lpatch0
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; CHECK: endbr
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; CHECK: .section __patchable_function_entries,"awo",@progbits,f1i{{$}}
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; 32-NEXT: .p2align 2
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; 32-NEXT: .long .Lfunc_begin3
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; 64-NEXT: .p2align 3
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; 64-NEXT: .quad .Lfunc_begin3
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entry:
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tail call i32 @llvm.eh.sjlj.setjmp(i8* bitcast ([5 x i8*]* @buf to i8*))
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ret void
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 4, !"cf-protection-branch", i32 1}
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