diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2227,6 +2227,7 @@
     // so we need to find those /usr/gcc/*/lib/gcc libdirs and go with
     // /usr/gcc/<version> as a prefix.
 
+    SmallVector<std::pair<GCCVersion, std::string>, 8> SolarisPrefixes;
     std::string PrefixDir = concat(SysRoot, "/usr/gcc");
     std::error_code EC;
     for (llvm::vfs::directory_iterator LI = D.getVFS().dir_begin(PrefixDir, EC),
@@ -2244,8 +2245,13 @@
       if (!D.getVFS().exists(CandidateLibPath))
         continue;
 
-      Prefixes.push_back(CandidatePrefix);
+      SolarisPrefixes.push_back(
+          std::make_pair(CandidateVersion, CandidatePrefix));
     }
+    // Sort in reverse order so GCCInstallationDetector::init picks the latest.
+    std::sort(SolarisPrefixes.rbegin(), SolarisPrefixes.rend());
+    for (auto p : SolarisPrefixes)
+      Prefixes.push_back(p.second);
     return;
   }
 
diff --git a/clang/unittests/Driver/ToolChainTest.cpp b/clang/unittests/Driver/ToolChainTest.cpp
--- a/clang/unittests/Driver/ToolChainTest.cpp
+++ b/clang/unittests/Driver/ToolChainTest.cpp
@@ -168,6 +168,155 @@
             S);
 }
 
+TEST(ToolChainTest, VFSSolarisMultiGCCInstallation) {
+  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
+
+  IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
+  struct TestDiagnosticConsumer : public DiagnosticConsumer {};
+  IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
+      new llvm::vfs::InMemoryFileSystem);
+
+  const char *EmptyFiles[] = {
+      // Sort entries so the latest version doesn't come first.
+      "/usr/gcc/7/lib/gcc/sparcv9-sun-solaris2.11/7.5.0/32/crtbegin.o",
+      "/usr/gcc/7/lib/gcc/sparcv9-sun-solaris2.11/7.5.0/crtbegin.o",
+      "/usr/gcc/7/lib/gcc/x86_64-pc-solaris2.11/7.5.0/32/crtbegin.o",
+      "/usr/gcc/7/lib/gcc/x86_64-pc-solaris2.11/7.5.0/crtbegin.o",
+      "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0/crtbegin.o",
+      "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0/sparcv8plus/"
+      "crtbegin.o",
+      "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0/32/crtbegin.o",
+      "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0/crtbegin.o",
+      "/usr/gcc/4.7/lib/gcc/i386-pc-solaris2.11/4.7.3/amd64/crtbegin.o",
+      "/usr/gcc/4.7/lib/gcc/i386-pc-solaris2.11/4.7.3/crtbegin.o",
+      "/usr/gcc/4.7/lib/gcc/sparc-sun-solaris2.11/4.7.3/crtbegin.o",
+      "/usr/gcc/4.7/lib/gcc/sparc-sun-solaris2.11/4.7.3/sparcv9/crtbegin.o",
+  };
+
+  for (const char *Path : EmptyFiles)
+    InMemoryFileSystem->addFile(Path, 0,
+                                llvm::MemoryBuffer::getMemBuffer("\n"));
+
+  {
+    DiagnosticsEngine Diags(DiagID, &*DiagOpts, new TestDiagnosticConsumer);
+    Driver TheDriver("/bin/clang", "i386-pc-solaris2.11", Diags,
+                     "clang LLVM compiler", InMemoryFileSystem);
+    std::unique_ptr<Compilation> C(
+        TheDriver.BuildCompilation({"-v", "--gcc-toolchain=", "--sysroot="}));
+    ASSERT_TRUE(C);
+    std::string S;
+    {
+      llvm::raw_string_ostream OS(S);
+      C->getDefaultToolChain().printVerboseInfo(OS);
+    }
+    if (is_style_windows(llvm::sys::path::Style::native))
+      std::replace(S.begin(), S.end(), '\\', '/');
+    EXPECT_EQ("Found candidate GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Selected GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Candidate multilib: .;@m64\n"
+              "Candidate multilib: 32;@m32\n"
+              "Selected multilib: 32;@m32\n",
+              S);
+  }
+
+  {
+    DiagnosticsEngine Diags(DiagID, &*DiagOpts, new TestDiagnosticConsumer);
+    Driver TheDriver("/bin/clang", "amd64-pc-solaris2.11", Diags,
+                     "clang LLVM compiler", InMemoryFileSystem);
+    std::unique_ptr<Compilation> C(
+        TheDriver.BuildCompilation({"-v", "--gcc-toolchain=", "--sysroot="}));
+    ASSERT_TRUE(C);
+    std::string S;
+    {
+      llvm::raw_string_ostream OS(S);
+      C->getDefaultToolChain().printVerboseInfo(OS);
+    }
+    if (is_style_windows(llvm::sys::path::Style::native))
+      std::replace(S.begin(), S.end(), '\\', '/');
+    EXPECT_EQ("Found candidate GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Selected GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Candidate multilib: .;@m64\n"
+              "Candidate multilib: 32;@m32\n"
+              "Selected multilib: .;@m64\n",
+              S);
+  }
+
+  {
+    DiagnosticsEngine Diags(DiagID, &*DiagOpts, new TestDiagnosticConsumer);
+    Driver TheDriver("/bin/clang", "x86_64-pc-solaris2.11", Diags,
+                     "clang LLVM compiler", InMemoryFileSystem);
+    std::unique_ptr<Compilation> C(
+        TheDriver.BuildCompilation({"-v", "--gcc-toolchain=", "--sysroot="}));
+    ASSERT_TRUE(C);
+    std::string S;
+    {
+      llvm::raw_string_ostream OS(S);
+      C->getDefaultToolChain().printVerboseInfo(OS);
+    }
+    if (is_style_windows(llvm::sys::path::Style::native))
+      std::replace(S.begin(), S.end(), '\\', '/');
+    EXPECT_EQ("Found candidate GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Selected GCC installation: "
+              "/usr/gcc/11/lib/gcc/x86_64-pc-solaris2.11/11.4.0\n"
+              "Candidate multilib: .;@m64\n"
+              "Candidate multilib: 32;@m32\n"
+              "Selected multilib: .;@m64\n",
+              S);
+  }
+
+  {
+    DiagnosticsEngine Diags(DiagID, &*DiagOpts, new TestDiagnosticConsumer);
+    Driver TheDriver("/bin/clang", "sparc-sun-solaris2.11", Diags,
+                     "clang LLVM compiler", InMemoryFileSystem);
+    std::unique_ptr<Compilation> C(
+        TheDriver.BuildCompilation({"-v", "--gcc-toolchain=", "--sysroot="}));
+    ASSERT_TRUE(C);
+    std::string S;
+    {
+      llvm::raw_string_ostream OS(S);
+      C->getDefaultToolChain().printVerboseInfo(OS);
+    }
+    if (is_style_windows(llvm::sys::path::Style::native))
+      std::replace(S.begin(), S.end(), '\\', '/');
+    EXPECT_EQ("Found candidate GCC installation: "
+              "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0\n"
+              "Selected GCC installation: "
+              "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0\n"
+              "Candidate multilib: .;@m64\n"
+              "Candidate multilib: sparcv8plus;@m32\n"
+              "Selected multilib: sparcv8plus;@m32\n",
+              S);
+  }
+  {
+    DiagnosticsEngine Diags(DiagID, &*DiagOpts, new TestDiagnosticConsumer);
+    Driver TheDriver("/bin/clang", "sparcv9-sun-solaris2.11", Diags,
+                     "clang LLVM compiler", InMemoryFileSystem);
+    std::unique_ptr<Compilation> C(
+        TheDriver.BuildCompilation({"-v", "--gcc-toolchain=", "--sysroot="}));
+    ASSERT_TRUE(C);
+    std::string S;
+    {
+      llvm::raw_string_ostream OS(S);
+      C->getDefaultToolChain().printVerboseInfo(OS);
+    }
+    if (is_style_windows(llvm::sys::path::Style::native))
+      std::replace(S.begin(), S.end(), '\\', '/');
+    EXPECT_EQ("Found candidate GCC installation: "
+              "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0\n"
+              "Selected GCC installation: "
+              "/usr/gcc/11/lib/gcc/sparcv9-sun-solaris2.11/11.4.0\n"
+              "Candidate multilib: .;@m64\n"
+              "Candidate multilib: sparcv8plus;@m32\n"
+              "Selected multilib: .;@m64\n",
+              S);
+  }
+}
+
 TEST(ToolChainTest, DefaultDriverMode) {
   IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();