ab23dace56
Summary: This suppresses the generation of .Lcfi labels in our textual assembler. It was annoying that this generated cascading .Lcfi labels: llc foo.ll -o - | llvm-mc | llvm-mc After three trips through MCAsmStreamer, we'd have three labels in the output when none are necessary. We should only bother creating the labels and frame data when making a real object file. This supercedes D38605, which moved the entire .seh_ implementation into MCObjectStreamer. This has the advantage that we do more checking when emitting textual assembly, as a minor efficiency cost. Outputting textual assembly is not performance critical, so this shouldn't matter. Reviewers: majnemer, MatzeB Subscribers: qcolombet, nemanjai, javed.absar, eraman, hiraditya, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D38638 llvm-svn: 315259
45 lines
1.4 KiB
LLVM
45 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck -check-prefix=CHECK-NO-FP %s
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -disable-fp-elim | FileCheck -check-prefix=CHECK-FP %s
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; RUN: llc < %s -mtriple=x86_64-linux-gnu | FileCheck -check-prefix=LINUX-NO-FP %s
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; RUN: llc < %s -mtriple=x86_64-linux-gnu -disable-fp-elim | FileCheck -check-prefix=LINUX-FP %s
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define void @func() {
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entry:
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unreachable
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}
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; MachO cannot handle an empty function.
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; CHECK-NO-FP: _func:
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; CHECK-NO-FP-NEXT: .cfi_startproc
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; CHECK-NO-FP: nop
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; CHECK-NO-FP-NEXT: .cfi_endproc
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; CHECK-FP: _func:
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; CHECK-FP-NEXT: .cfi_startproc
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; CHECK-FP-NEXT: :
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; CHECK-FP-NEXT: pushq %rbp
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; CHECK-FP-NEXT: .cfi_def_cfa_offset 16
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; CHECK-FP-NEXT: .cfi_offset %rbp, -16
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; CHECK-FP-NEXT: movq %rsp, %rbp
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; CHECK-FP-NEXT: .cfi_endproc
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; An empty function is perfectly fine on ELF.
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; LINUX-NO-FP: func:
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; LINUX-NO-FP-NEXT: .cfi_startproc
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; LINUX-NO-FP-NEXT: {{^}}#
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; LINUX-NO-FP-NEXT: {{^}}.L{{.*}}:{{$}}
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; LINUX-NO-FP-NEXT: .size func, .L{{.*}}-func
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; LINUX-NO-FP-NEXT: .cfi_endproc
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; A cfi directive cannot point to the end of a function.
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; LINUX-FP: func:
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; LINUX-FP-NEXT: .cfi_startproc
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; LINUX-FP-NEXT: {{^}}#
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; LINUX-FP-NEXT: pushq %rbp
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; LINUX-FP-NEXT: .cfi_def_cfa_offset 16
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; LINUX-FP-NEXT: .cfi_offset %rbp, -16
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; LINUX-FP-NEXT: movq %rsp, %rbp
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; LINUX-FP-NEXT:{{^}}.L{{.*}}:{{$}}
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; LINUX-FP-NEXT: .size func, .Lfunc_end0-func
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; LINUX-FP-NEXT: .cfi_endproc
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