Linux-specific fixes for the swift-frontend rename.

Hardlinking to a symlink is not permitted, so use "swift-frontend"
instead of "swift" as the hard-link target.

Also, update one Linux-specific test to check for swift-frontend.

Author: DougGregor

test/Driver/driver-compile.swift

@@ -46,7 +46,7 @@
 // RUN: %swiftc_driver -driver-print-jobs -c -target x86_64-apple-macosx10.9 %s %S/../Inputs/empty.swift -module-name main -driver-filelist-threshold=0 2>&1 | %FileCheck -check-prefix=FILELIST %s
 
 // RUN: %empty-directory(%t)/DISTINCTIVE-PATH/usr/bin/
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t/DISTINCTIVE-PATH/usr/bin/swiftc)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t/DISTINCTIVE-PATH/usr/bin/swiftc)
 // RUN: ln -s "swiftc" %t/DISTINCTIVE-PATH/usr/bin/swift-update
 // RUN: %t/DISTINCTIVE-PATH/usr/bin/swiftc -driver-print-jobs -c -update-code -target x86_64-apple-macosx10.9 %s 2>&1 > %t.upd.txt
 // RUN: %FileCheck -check-prefix UPDATE-CODE %s < %t.upd.txt

test/Driver/embed-bitcode.swift

@@ -6,8 +6,8 @@
 // CHECK-coff: "swiftc.{{exe}}", inputs: ["[[BC]]"], output: {object: "[[OBJECT:.*\.o]]"}
 // CHECK-coff: "clang.exe", inputs: ["[[OBJECT]]"], output: {image: "embed-bitcode"}
 
-// CHECK-elf: "swift", inputs: ["{{.*}}embed-bitcode.swift"], output: {llvm-bc: "[[BC:.*\.bc]]"}
-// CHECK-elf: "swift", inputs: ["[[BC]]"], output: {object: "[[OBJECT:.*\.o]]"}
+// CHECK-elf: "swift-frontend", inputs: ["{{.*}}embed-bitcode.swift"], output: {llvm-bc: "[[BC:.*\.bc]]"}
+// CHECK-elf: "swift-frontend", inputs: ["[[BC]]"], output: {object: "[[OBJECT:.*\.o]]"}
 // CHECK-elf: "swift-autolink-extract", inputs: ["[[OBJECT]]"], output: {autolink: "[[AUTOLINK:.*\.autolink]]"}
 // CHECK-elf: "clang", inputs: ["[[OBJECT]]", "[[AUTOLINK]]"], output: {image: "main"}
 

test/Driver/linker-autolink-extract.swift

@@ -5,7 +5,7 @@
 // DEBUG_LINUX: bin/swift
 // DEBUG_LINUX-NEXT: bin/swift-autolink-extract
 // DEBUG_LINUX-NEXT: bin/swift
-// DEBUG_LINUX-NEXT: bin/swift -modulewrap
+// DEBUG_LINUX-NEXT: bin/swift-frontend -modulewrap
 // DEBUG_LINUX-NEXT: bin/clang{{"? }}
 // DEBUG_LINUX: -o main
 // DEBUG_LINUX-NOT: dsymutil

test/Driver/linker-clang_rt.swift

@@ -6,7 +6,7 @@
 
 // RUN: rm -rf %t
 // RUN: %empty-directory(%t/bin)
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t/bin/swiftc)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t/bin/swiftc)
 // RUN: %empty-directory(%t/lib/swift/clang/lib/darwin/)
 
 // RUN: %t/bin/swiftc -driver-print-jobs -target x86_64-apple-macosx10.9 %S/../Inputs/empty.swift | %FileCheck -check-prefix CHECK -check-prefix CHECK-NO-RUNTIME %s

test/Driver/linker.swift

@@ -415,7 +415,7 @@
 // RUN: %empty-directory(%t/DISTINCTIVE-PATH/usr/bin)
 // RUN: touch %t/DISTINCTIVE-PATH/usr/bin/ld
 // RUN: chmod +x %t/DISTINCTIVE-PATH/usr/bin/ld
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t/DISTINCTIVE-PATH/usr/bin/swiftc)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t/DISTINCTIVE-PATH/usr/bin/swiftc)
 // RUN: %t/DISTINCTIVE-PATH/usr/bin/swiftc -target x86_64-apple-macosx10.9 %s -### | %FileCheck -check-prefix=RELATIVE-LINKER %s
 
 // RELATIVE-LINKER: {{/|\\\\}}DISTINCTIVE-PATH{{/|\\\\}}usr{{/|\\\\}}bin{{/|\\\\}}swift

test/Driver/options-repl.swift

@@ -7,7 +7,7 @@
 
 // RUN: %empty-directory(%t)
 // RUN: mkdir -p %t/usr/bin
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t/usr/bin/swift)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t/usr/bin/swift)
 
 // RUN: %t/usr/bin/swift -sdk "" -deprecated-integrated-repl -### | %FileCheck -check-prefix=INTEGRATED %s
 

test/Driver/subcommands.swift

@@ -3,7 +3,7 @@
 
 // RUN: rm -rf %t.dir
 // RUN: mkdir -p %t.dir/usr/bin
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t.dir/usr/bin/swift)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t.dir/usr/bin/swift)
 
 // RUN: %t.dir/usr/bin/swift -### 2>&1 | %FileCheck -check-prefix=CHECK-SWIFT-INVOKES-REPL %s
 // RUN: %t.dir/usr/bin/swift repl -### 2>&1 | %FileCheck -check-prefix=CHECK-SWIFT-INVOKES-REPL %s

test/Driver/windows-link-job.swift

@@ -1,4 +1,4 @@
 // RUN: %empty-directory(%t/DISTINCTIVE-WINDOWS-PATH/usr/bin)
-// RUN: %hardlink-or-copy(from: %swift_driver_plain, to: %t/DISTINCTIVE-WINDOWS-PATH/usr/bin/swiftc)
+// RUN: %hardlink-or-copy(from: %swift_frontend_plain, to: %t/DISTINCTIVE-WINDOWS-PATH/usr/bin/swiftc)
 // RUN: env PATH= %t/DISTINCTIVE-WINDOWS-PATH/usr/bin/swiftc -target x86_64-unknown-windows-msvc -### -module-name link -emit-library %s 2>&1 | %FileCheck %s
 // CHECK: {{^}}clang

test/lit.cfg

@@ -381,6 +381,8 @@ config.substitutions.append( ('%{python}', sys.executable) )
 config.substitutions.append( ('%mcp_opt', mcp_opt) )
 config.substitutions.append( ('%swift_driver_plain', "%r" % config.swift) )
 config.substitutions.append( ('%swiftc_driver_plain', "%r" % config.swiftc) )
+config.substitutions.append( ('%swift_frontend_plain', "%r" % config.swift_frontend))
+
 if kIsWindows:
     config.substitutions.append( ('%swift_driver',
                                   "%r %s %s %s -libc %s" % (config.swift, mcp_opt,