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[PGO] Enable clang to pass compiler-rt profile support library to linker on Windows 

Summary: This change enables clang to automatically link binaries built with the -fprofile-instr-generate against the clang_rt.profile-i386.lib library.

Reviewers: davidxl, dnovillo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D15833

llvm-svn: 256855
This commit is contained in:
Nathan Slingerland 2016-01-05 18:27:06 +00:00
parent 1e06636b32
commit e8ddf9e9db
2 changed files with 18 additions and 0 deletions
clang
lib/Driver
Tools.cpp
test/Driver
instrprof-ld.c

2
clang/lib/Driver/Tools.cpp
View File

@ -9473,6 +9473,8 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
A.renderAsInput(Args, CmdArgs);
}
TC.addProfileRTLibs(Args, CmdArgs);
// We need to special case some linker paths. In the case of lld, we need to
// translate 'lld' into 'lld-link', and in the case of the regular msvc
// linker, we need to use a special search algorithm.

16
clang/test/Driver/instrprof-ld.c
View File

@ -105,3 +105,19 @@
//
// CHECK-WATCHOS-ARMV7: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
// CHECK-WATCHOS-ARMV7: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}darwin{{/|\\\\}}libclang_rt.profile_watchos.a"
//
// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
// RUN: -target i386-pc-win32 -fprofile-instr-generate \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=CHECK-WINDOWS-I386 %s
//
// CHECK-WINDOWS-I386: "{{.*}}link{{(.exe)?}}"
// CHECK-WINDOWS-I386: "{{.*}}clang_rt.profile-i386.lib"
//
// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
// RUN: -target x86_64-pc-win32 -fprofile-instr-generate \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=CHECK-WINDOWS-X86-64 %s
//
// CHECK-WINDOWS-X86-64: "{{.*}}link{{(.exe)?}}"
// CHECK-WINDOWS-X86-64: "{{.*}}clang_rt.profile-x86_64.lib"