Add driver support for -emit-ast and AST compilation steps.
- <rdar://problem/7185031> Add 'clang' option '-emit-ast'
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80678 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/ast.c b/test/Driver/ast.c
new file mode 100644
index 0000000..b5d342c
--- /dev/null
+++ b/test/Driver/ast.c
@@ -0,0 +1,22 @@
+// RUN: clang -ccc-host-triple i386-unknown-unknown -ccc-print-phases -emit-ast %s 2> %t &&
+// RUN: FileCheck -check-prefix EMIT-AST-PHASES -input-file %t %s &&
+
+// EMIT-AST-PHASES: 0: input,
+// EMIT-AST-PHASES: , c
+// EMIT-AST-PHASES: 1: preprocessor, {0}, cpp-output
+// EMIT-AST-PHASES: 2: compiler, {1}, ast
+// EMIT-AST-PHASES-NOT: 3:
+
+// RUN: touch %t.ast &&
+// RUN: clang -ccc-host-triple i386-unknown-unknown -ccc-print-phases -c %t.ast 2> %t &&
+// RUN: FileCheck -check-prefix COMPILE-AST-PHASES -input-file %t %s
+
+// COMPILE-AST-PHASES: 0: input,
+// COMPILE-AST-PHASES: , ast
+// COMPILE-AST-PHASES: 1: compiler, {0}, assembler
+// COMPILE-AST-PHASES: 2: assembler, {1}, object
+// COMPILE-AST-PHASES-NOT: 3:
+
+// FIXME: There is a problem with compiling AST's in that the input language is
+// not availabe for use by other tools (for example, to automatically add
+// -lstdc++). We may need -x [objective-]c++-ast and all that goodness. :(