c13b046de3
Basic block sections profiles are ingested based on the function name. However, conflicts may occur when internal linkage functions with the same symbol name are linked into the binary (for instance static functions defined in different modules). Currently, these functions cannot be optimized unless we use `-funique-internal-linkage-names` (D89617) to enforce unique symbol names. However, we have found that `-funique-internal-linkage-names` does not play well with inline assembly code which refers to the symbol via its symbol name. For example, the Linux kernel does not build with this option. This patch implements a new feature which allows differentiating profiles based on the debug info filenames associated with each function. When specified, the given path is compared against the debug info filename of the matching function and profile is ingested only when the debug info filenames match. Backward-compatibility is guaranteed as omitting the specifiers from the profile would allow them to be matched by function name only. Also specifiers can be included for a subset of functions only. Reviewed By: shenhan Differential Revision: https://reviews.llvm.org/D146770
123 lines
4.3 KiB
LLVM
123 lines
4.3 KiB
LLVM
;; This file tests various ways of specifying the debug info filename in the basic block sections profile.
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;; Specifying correct filenames.
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; RUN: echo '!test1 M=./test_dirname1/test_filename1' > %t1
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; RUN: echo '!!0' >> %t1
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; RUN: echo '!test2 M=.//test_filename2' >> %t1
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; RUN: echo '!!0' >> %t1
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; RUN: echo '!test3 M=test_filename3' >> %t1
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; RUN: echo '!!0' >> %t1
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; RUN: echo '!test4 M=/test_dirname4/test_filename4' >> %t1
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; RUN: echo '!!0' >> %t1
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; RUN: echo '!test5' >> %t1
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; RUN: echo '!!0' >> %t1
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; RUN: llc < %s -mtriple=x86_64 -function-sections -basic-block-sections=%t1 | FileCheck %s -check-prefix=RIGHT-MODULE
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;; Specifying wrong filenames.
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; RUN: echo '!test1 M=/test_dirname/test_filename1' > %t2
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; RUN: echo '!!0' >> %t2
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; RUN: echo '!test1 M=../test_filename1' >> %t2
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; RUN: echo '!!0' >> %t2
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; RUN: echo '!test2 M=.test_filename2' >> %t2
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; RUN: echo '!!0' >> %t2
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; RUN: echo '!test4 M=./test_dirname4/test_filename4' >> %t2
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; RUN: echo '!!0' >> %t2
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; RUN: echo '!test5 M=any_filename' >> %t1
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; RUN: echo '!!0' >> %t1
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; RUN: llc < %s -mtriple=x86_64 -function-sections -basic-block-sections=%t2 | FileCheck %s -check-prefix=WRONG-MODULE
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define dso_local i32 @test1(i32 noundef %0) #0 !dbg !10 {
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4
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%4 = load i32, i32* %3, align 4
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%5 = icmp slt i32 %4, 0
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br i1 %5, label %6, label %7
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6: ; preds = %1
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store i32 -1, i32* %2, align 4
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ret i32 0
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7:
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ret i32 1
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}
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define dso_local i32 @test2(i32 noundef %0) #0 !dbg !11 {
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4
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%4 = load i32, i32* %3, align 4
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%5 = icmp slt i32 %4, 0
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br i1 %5, label %6, label %7
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6: ; preds = %1
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store i32 -1, i32* %2, align 4
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ret i32 0
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7:
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ret i32 1
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}
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define dso_local i32 @test3(i32 noundef %0) #0 !dbg !12 {
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4
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%4 = load i32, i32* %3, align 4
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%5 = icmp slt i32 %4, 0
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br i1 %5, label %6, label %7
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6: ; preds = %1
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store i32 -1, i32* %2, align 4
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ret i32 0
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7:
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ret i32 1
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}
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define dso_local i32 @test4(i32 noundef %0) #0 !dbg !13 {
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4
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%4 = load i32, i32* %3, align 4
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%5 = icmp slt i32 %4, 0
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br i1 %5, label %6, label %7
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6: ; preds = %1
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store i32 -1, i32* %2, align 4
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ret i32 0
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7:
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ret i32 1
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}
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define dso_local i32 @test5(i32 noundef %0) #0 {
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4
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%4 = load i32, i32* %3, align 4
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%5 = icmp slt i32 %4, 0
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br i1 %5, label %6, label %7
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6: ; preds = %1
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store i32 -1, i32* %2, align 4
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ret i32 0
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7:
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ret i32 1
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}
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!llvm.dbg.cu = !{!0, !1, !2, !3}
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!llvm.module.flags = !{!8, !9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !4)
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !5)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !6)
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!3 = distinct !DICompileUnit(language: DW_LANG_C99, file: !7)
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!4 = !DIFile(filename: "test_dirname1/test_filename1", directory: "test_dirname1")
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!5 = !DIFile(filename: "test_filename2", directory: "")
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!6 = !DIFile(filename: "./test_filename3", directory: ".")
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!7 = !DIFile(filename: "/test_dirname4/test_filename4", directory: "/test_dirname4")
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!8 = !{i32 7, !"Dwarf Version", i32 5}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = distinct !DISubprogram(name: "test1", scope: !4, unit: !0)
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!11 = distinct !DISubprogram(name: "test2", scope: !5, unit: !1)
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!12 = distinct !DISubprogram(name: "test3", scope: !6, unit: !2)
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!13 = distinct !DISubprogram(name: "test4", scope: !7, unit: !3)
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;; Check that the split section is created when using the correct module name, or no module name.
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;
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; RIGHT-MODULE: .section .text.split.test1,"ax",@progbits
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; RIGHT-MODULE: .section .text.split.test2,"ax",@progbits
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; RIGHT-MODULE: .section .text.split.test3,"ax",@progbits
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; RIGHT-MODULE: .section .text.split.test4,"ax",@progbits
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; RIGHT-MODULE: .section .text.split.test5,"ax",@progbits
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; WRONG-MODULE-NOT: .section .text.split.test{{[1-5]+}},"ax",@progbits
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