Index: clang/test/make_test_dirs.pl
===================================================================
--- clang/test/make_test_dirs.pl
+++ clang/test/make_test_dirs.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 #
 # Simple little Perl script that takes the cxx-sections.data file as
 # input and generates a directory structure that mimics the standard's
Index: clang/tools/scan-build/bin/set-xcode-analyzer
===================================================================
--- clang/tools/scan-build/bin/set-xcode-analyzer
+++ clang/tools/scan-build/bin/set-xcode-analyzer
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # [PR 11661] Note that we hardwire to /usr/bin/python because we
 # want to the use the system version of Python on Mac OS X.
Index: clang/utils/TestUtils/pch-test.pl
===================================================================
--- clang/utils/TestUtils/pch-test.pl
+++ clang/utils/TestUtils/pch-test.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 
 # This tiny little script, which should be run from the clang
 # directory (with clang in your patch), tries to take each
Index: clang/utils/analyzer/reducer.pl
===================================================================
--- clang/utils/analyzer/reducer.pl
+++ clang/utils/analyzer/reducer.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 use strict;
 use File::Temp qw/ tempdir /;
 my $prog = "reducer";
@@ -31,7 +31,7 @@
 my $commandStr = "@$command";
 
 print OUT <<ENDTEXT;
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 use strict;
 my \$BAD = 1;
 my \$GOOD = 0;
Index: clang/utils/analyzer/update_plist_test.pl
===================================================================
--- clang/utils/analyzer/update_plist_test.pl
+++ clang/utils/analyzer/update_plist_test.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 use strict;
 require File::Temp;
 use File::Temp ();
Index: compiler-rt/utils/generate_netbsd_ioctls.awk
===================================================================
--- compiler-rt/utils/generate_netbsd_ioctls.awk
+++ compiler-rt/utils/generate_netbsd_ioctls.awk
@@ -1,4 +1,4 @@
-#!/usr/bin/awk -f
+#!/usr/bin/env awk -f
 
 #===-- generate_netbsd_ioctls.awk ------------------------------------------===#
 #
Index: compiler-rt/utils/generate_netbsd_syscalls.awk
===================================================================
--- compiler-rt/utils/generate_netbsd_syscalls.awk
+++ compiler-rt/utils/generate_netbsd_syscalls.awk
@@ -1,4 +1,4 @@
-#!/usr/bin/awk -f
+#!/usr/bin/env awk -f
 
 #===-- generate_netbsd_syscalls.awk ----------------------------------------===#
 #
Index: debuginfo-tests/llgdb-tests/test_debuginfo.pl
===================================================================
--- debuginfo-tests/llgdb-tests/test_debuginfo.pl
+++ debuginfo-tests/llgdb-tests/test_debuginfo.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #
 # This script tests debugging information generated by a compiler.
 # Input arguments
Index: lldb/docs/use/python-reference.rst
===================================================================
--- lldb/docs/use/python-reference.rst
+++ lldb/docs/use/python-reference.rst
@@ -595,7 +595,7 @@
 
 ::
 
-  #!/usr/bin/python
+  #!/usr/bin/env python
 
   import lldb
   import commands
@@ -703,7 +703,7 @@
 
 ::
 
-  #!/usr/bin/python
+  #!/usr/bin/env python
 
   import lldb
   import os
Index: lldb/scripts/disasm-gdb-remote.pl
===================================================================
--- lldb/scripts/disasm-gdb-remote.pl
+++ lldb/scripts/disasm-gdb-remote.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use strict;
 
Index: llvm/utils/GenLibDeps.pl
===================================================================
--- llvm/utils/GenLibDeps.pl
+++ llvm/utils/GenLibDeps.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 #
 # Program:  GenLibDeps.pl
 #
Index: llvm/utils/codegen-diff
===================================================================
--- llvm/utils/codegen-diff
+++ llvm/utils/codegen-diff
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use Getopt::Std;
 $DEBUG = 0;
Index: llvm/utils/findsym.pl
===================================================================
--- llvm/utils/findsym.pl
+++ llvm/utils/findsym.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl -w
 #
 # Program:  findsym.pl
 #
Index: llvm/utils/llvm-compilers-check
===================================================================
--- llvm/utils/llvm-compilers-check
+++ llvm/utils/llvm-compilers-check
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 ##===- utils/llvmbuild - Build the LLVM project ----------------*-python-*-===##
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
Index: llvm/utils/llvm-native-gxx
===================================================================
--- llvm/utils/llvm-native-gxx
+++ llvm/utils/llvm-native-gxx
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 # Wrapper around LLVM tools to generate a native .o from llvm-gxx using an
 # LLVM back-end (CBE by default).
 
Index: openmp/runtime/tools/check-execstack.pl
===================================================================
--- openmp/runtime/tools/check-execstack.pl
+++ openmp/runtime/tools/check-execstack.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #
 #//===----------------------------------------------------------------------===//
Index: openmp/runtime/tools/check-instruction-set.pl
===================================================================
--- openmp/runtime/tools/check-instruction-set.pl
+++ openmp/runtime/tools/check-instruction-set.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #
 #//===----------------------------------------------------------------------===//
Index: openmp/runtime/tools/message-converter.pl
===================================================================
--- openmp/runtime/tools/message-converter.pl
+++ openmp/runtime/tools/message-converter.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #
 #//===----------------------------------------------------------------------===//
Index: polly/lib/External/isl/doc/mypod2latex
===================================================================
--- polly/lib/External/isl/doc/mypod2latex
+++ polly/lib/External/isl/doc/mypod2latex
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use strict;
 use Pod::LaTeX;