7620f03ef7
When both SHF_LINK_ORDER | SHF_GROUP flags are set, GNU assembler from 2.35 onwards (https://sourceware.org/PR25381 https://sourceware.org/binutils/docs/as/Section.html) parses the SHF_LINK_ORDER argument before section group name, different from us. This is unfortunate, but does not matter because the `.section` flag `o` is a niche feature only used by compiler instrumentations, not adopted by hand-written assembly, and using both flags is extremely rare. Let's just match GNU assembler. There is another benefit: we now support zero-flag section group with the SHF_LINK_ORDER flag, while previously there isn't a syntax. While here, print 'G' after 'o' to be clear that the 'G' argument is parsed after the 'o' argument. To make the diff smaller, we don't print 'G' after 'w' in the absence of 'o' for now.
81 lines
3.7 KiB
LLVM
81 lines
3.7 KiB
LLVM
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -binutils-version=2.35 | FileCheck %s --check-prefixes=CHECK,NORMAL
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; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -binutils-version=2.36 | FileCheck %s --check-prefixes=CHECK,NORMAL
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; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections -binutils-version=2.35 | FileCheck %s --check-prefixes=CHECK,SEP_BFD
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; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections -binutils-version=2.36 | FileCheck %s --check-prefixes=CHECK,SEP
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; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,SEP_NOUNIQUE
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; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,NOUNIQUE
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@_ZTIi = external constant ptr
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;; If the function is in a comdat group, the generated .gcc_except_table should
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;; be placed in the same group, so that .gcc_except_table can be discarded if
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;; the comdat is not prevailing. If -funique-section-names, append the function name.
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$group = comdat any
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define i32 @group() uwtable comdat personality ptr @__gxx_personality_v0 {
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; CHECK-LABEL: group:
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; CHECK: .cfi_endproc
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; NORMAL-NEXT: .section .gcc_except_table.group,"aG",@progbits,group,comdat{{$}}
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; SEP_BFD-NEXT: .section .gcc_except_table.group,"aG",@progbits,group,comdat{{$}}
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; SEP-NEXT: .section .gcc_except_table.group,"aoG",@progbits,group,group,comdat{{$}}
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; SEP_NOUNIQUE-NEXT: .section .gcc_except_table,"aG",@progbits,group,comdat{{$}}
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; NOUNIQUE-NEXT: .section .gcc_except_table,"aG",@progbits,group,comdat{{$}}
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entry:
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invoke void @ext() to label %try.cont unwind label %lpad
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lpad:
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%0 = landingpad { ptr, i32 } catch ptr @_ZTIi
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br label %eh.resume
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try.cont:
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ret i32 0
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eh.resume:
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resume { ptr, i32 } %0
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}
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;; If the function is not in a comdat group, but function sections is enabled,
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;; use a separate section by either using a unique ID (integrated assembler) or
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;; a suffix (GNU as<2.35).
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define i32 @foo() uwtable personality ptr @__gxx_personality_v0 {
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; CHECK-LABEL: foo:
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; CHECK: .cfi_endproc
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; NORMAL-NEXT: .section .gcc_except_table,"a",@progbits{{$}}
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; SEP_BFD-NEXT: .section .gcc_except_table.foo,"a",@progbits{{$}}
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; SEP-NEXT: .section .gcc_except_table.foo,"ao",@progbits,foo{{$}}
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; SEP_NOUNIQUE-NEXT: .section .gcc_except_table,"a",@progbits{{$}}
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; NOUNIQUE-NEXT: .section .gcc_except_table,"a",@progbits{{$}}
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entry:
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invoke void @ext() to label %try.cont unwind label %lpad
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lpad:
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%0 = landingpad { ptr, i32 } catch ptr @_ZTIi
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br label %eh.resume
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try.cont:
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ret i32 0
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eh.resume:
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resume { ptr, i32 } %0
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}
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;; If the function is in a comdat group with nodeduplicate kind, the generated
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;; .gcc_except_table should is lowered to a zero-flag ELF section group.
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$zero = comdat nodeduplicate
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define i32 @zero() uwtable comdat personality ptr @__gxx_personality_v0 {
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; CHECK-LABEL: zero:
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; CHECK: .cfi_endproc
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; NORMAL-NEXT: .section .gcc_except_table.zero,"aG",@progbits,zero{{$}}
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; SEP_BFD-NEXT: .section .gcc_except_table.zero,"aG",@progbits,zero{{$}}
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; SEP-NEXT: .section .gcc_except_table.zero,"aoG",@progbits,zero,zero{{$}}
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; SEP_NOUNIQUE-NEXT: .section .gcc_except_table,"aG",@progbits,zero{{$}}
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; NOUNIQUE-NEXT: .section .gcc_except_table,"aG",@progbits,zero{{$}}
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entry:
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invoke void @ext() to label %try.cont unwind label %lpad
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lpad:
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%0 = landingpad { ptr, i32 } catch ptr @_ZTIi
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br label %eh.resume
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try.cont:
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ret i32 0
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eh.resume:
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resume { ptr, i32 } %0
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}
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declare void @ext()
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declare i32 @__gxx_personality_v0(...)
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