7af802994e
Text section prefix is created in CodeGenPrepare, it's file format independent implementation, text section name is written into object file in TargetLoweringObjectFile, it's file format dependent implementation, port code of adding text section prefix to text section name from ELF to COFF. Different with ELF that use '.' as concatenation character, COFF use '$' as concatenation character. That is, concatenation character is variable, so split concatenation character from text section prefix. Text section prefix is existing feature of ELF, it can help to reduce icache and itlb misses, it's also make possible aggregate other compilers e.g. v8 created same prefix sections. Furthermore, the recent feature Machine Function Splitter (basic block level text prefix section) is based on text section prefix. Reviewed By: pengfei, rnk Differential Revision: https://reviews.llvm.org/D92073
59 lines
2.6 KiB
LLVM
59 lines
2.6 KiB
LLVM
; REQUIRES: x86-registered-target
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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/inline.prof -codegenprepare -S | FileCheck %s
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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/inline.prof -codegenprepare -profile-unknown-in-special-section -partial-profile -S | FileCheck %s --check-prefix UNKNOWN
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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/inline.prof -codegenprepare -profile-sample-accurate -S | FileCheck %s --check-prefix ACCURATE
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target triple = "x86_64-pc-linux-gnu"
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; The test checks that function without profile gets unlikely section prefix
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; if -profile-sample-accurate is specified or the function has the
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; profile-sample-accurate attribute.
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declare void @hot_func()
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; CHECK-NOT: foo_not_in_profile{{.*}}!section_prefix
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; CHECK: foo_not_in_profile{{.*}}!prof ![[NOPROFILE_ID:[0-9]+]]
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; UNKNOWN: foo_not_in_profile{{.*}}!prof ![[NOPROFILE_ID:[0-9]+]] !section_prefix ![[UNKNOWN_ID:[0-9]+]]
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; ACCURATE: foo_not_in_profile{{.*}}!prof ![[ZERO_ID:[0-9]+]] !section_prefix ![[COLD_ID:[0-9]+]]
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; The function not appearing in profile is cold when -profile-sample-accurate
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; is on.
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define void @foo_not_in_profile() #1 {
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call void @hot_func()
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ret void
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}
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; CHECK: bar_not_in_profile{{.*}}!prof ![[ZERO_ID:[0-9]+]] !section_prefix ![[COLD_ID:[0-9]+]]
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; ACCURATE: bar_not_in_profile{{.*}}!prof ![[ZERO_ID:[0-9]+]] !section_prefix ![[COLD_ID:[0-9]+]]
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; The function not appearing in profile is cold when the func has
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; profile-sample-accurate attribute.
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define void @bar_not_in_profile() #0 {
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call void @hot_func()
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ret void
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}
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attributes #0 = { "profile-sample-accurate" "use-sample-profile" }
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attributes #1 = { "use-sample-profile" }
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; CHECK: ![[NOPROFILE_ID]] = !{!"function_entry_count", i64 -1}
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; CHECK: ![[ZERO_ID]] = !{!"function_entry_count", i64 0}
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; CHECK: ![[COLD_ID]] = !{!"function_section_prefix", !"unlikely"}
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; UNKNOWN: ![[NOPROFILE_ID]] = !{!"function_entry_count", i64 -1}
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; UNKNOWN: ![[UNKNOWN_ID]] = !{!"function_section_prefix", !"unknown"}
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; ACCURATE: ![[ZERO_ID]] = !{!"function_entry_count", i64 0}
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; ACCURATE: ![[COLD_ID]] = !{!"function_section_prefix", !"unlikely"}
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"SampleProfile"}
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!4 = !{!"TotalCount", i64 10000}
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!5 = !{!"MaxCount", i64 1000}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 1000}
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!8 = !{!"NumCounts", i64 3}
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!9 = !{!"NumFunctions", i64 3}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 100, i32 1}
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!13 = !{i32 999000, i64 100, i32 1}
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!14 = !{i32 999999, i64 1, i32 2}
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