f50aef745c
This broke the check-profile tests on Mac, see comment on the code review. > This is no longer needed, we can add __llvm_profile_runtime directly > to llvm.compiler.used or llvm.used to achieve the same effect. > > Differential Revision: https://reviews.llvm.org/D98325 This reverts commitc7712087cb. Also reverting the dependent follow-up commit: Revert "[InstrProfiling] Generate runtime hook for ELF platforms" > When using -fprofile-list to selectively apply instrumentation only > to certain files or functions, we may end up with a binary that doesn't > have any counters in the case where no files were selected. However, > because on Linux and Fuchsia, we pass -u__llvm_profile_runtime, the > runtime would still be pulled in and incur some non-trivial overhead, > especially in the case when the continuous or runtime counter relocation > mode is being used. A better way would be to pull in the profile runtime > only when needed by declaring the __llvm_profile_runtime symbol in the > translation unit only when needed. > > This approach was already used prior to9a041a7522, but we changed it > to always generate the __llvm_profile_runtime due to a TAPI limitation. > Since TAPI is only used on Mach-O platforms, we could use the early > emission of __llvm_profile_runtime there, and on other platforms we > could change back to the earlier approach where the symbol is generated > later only when needed. We can stop passing -u__llvm_profile_runtime to > the linker on Linux and Fuchsia since the generated undefined symbol in > each translation unit that needed it serves the same purpose. > > Differential Revision: https://reviews.llvm.org/D98061 This reverts commit87fd09b25f.
46 lines
2.2 KiB
C
46 lines
2.2 KiB
C
// Test coverage ld flags.
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//
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// RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
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// RUN: -target i386-unknown-linux -fprofile-arcs \
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// RUN: -resource-dir=%S/Inputs/resource_dir \
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// RUN: --sysroot=%S/Inputs/basic_linux_tree \
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// RUN: | FileCheck --check-prefix=CHECK-LINUX-I386 %s
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//
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// RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
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// RUN: -target i386-unknown-linux --coverage \
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// RUN: -resource-dir=%S/Inputs/resource_dir \
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// RUN: --sysroot=%S/Inputs/basic_linux_tree \
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// RUN: | FileCheck --check-prefix=CHECK-LINUX-I386 %s
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//
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// CHECK-LINUX-I386-NOT: "-u__llvm_profile_runtime"
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// CHECK-LINUX-I386: /Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-i386.a"
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// CHECK-LINUX-I386-NOT: "-u__llvm_profile_runtime"
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// CHECK-LINUX-I386: "-lc"
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//
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// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
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// RUN: -target x86_64-unknown-linux --coverage -fuse-ld=ld \
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// RUN: -resource-dir=%S/Inputs/resource_dir \
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// RUN: --sysroot=%S/Inputs/basic_linux_tree \
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// RUN: | FileCheck --check-prefix=CHECK-LINUX-X86-64 %s
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//
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// CHECK-LINUX-X86-64: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
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// CHECK-LINUX-X86-64: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-x86_64.a" {{.*}} "-lc"
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//
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// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
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// RUN: -target x86_64-unknown-freebsd --coverage -fuse-ld=ld \
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// RUN: -resource-dir=%S/Inputs/resource_dir \
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// RUN: --sysroot=%S/Inputs/basic_freebsd64_tree \
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// RUN: | FileCheck --check-prefix=CHECK-FREEBSD-X86-64 %s
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//
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// CHECK-FREEBSD-X86-64: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
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// CHECK-FREEBSD-X86-64: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}freebsd{{/|\\\\}}libclang_rt.profile-x86_64.a"
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//
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// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
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// RUN: -target arm-linux-androideabi --coverage -fuse-ld=ld \
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// RUN: -resource-dir=%S/Inputs/resource_dir \
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// RUN: --sysroot=%S/Inputs/basic_android_tree/sysroot \
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// RUN: | FileCheck --check-prefix=CHECK-ANDROID-ARM %s
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//
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// CHECK-ANDROID-ARM: "{{(.*[^.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
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// CHECK-ANDROID-ARM: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-arm-android.a"
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