MS inline asm: Tests for r214550

These tests seem like an exception to the rule against assembly emitting
tests in clang.  I made an LLVM side change that can only be tested by
setting up the inline assembly machinery that is only implemented by
Clang.

llvm-svn: 214552

1 files changed, 60 insertions, 0 deletions

diff --git a/clang/test/CodeGen/ms-inline-asm-functions.c b/clang/test/CodeGen/ms-inline-asm-functions.c
new file mode 100644
index 00000000000..1a6ead9286d
--- /dev/null
+++ b/clang/test/CodeGen/ms-inline-asm-functions.c
@@ -0,0 +1,60 @@
+// REQUIRES: x86-registered-target
+// RUN: %clang_cc1 %s -triple i386-pc-windows-msvc -fms-extensions -S -o - | FileCheck %s
+
+// Yes, this is an assembly test from Clang, because we need to make it all the
+// way through code generation to know if our call became a direct, pc-relative
+// call or an indirect call through memory.
+
+int k(int);
+__declspec(dllimport) int kimport(int);
+int (*kptr)(int);
+int (*gptr())(int);
+
+int foo() {
+  // CHECK-LABEL: _foo:
+  int (*r)(int) = gptr();
+
+  // Simple case: direct call.
+  __asm call k;
+  // CHECK:     calll   _k
+
+  // Marginally harder: indirect calls, via dllimport or function pointer.
+  __asm call r;
+  // CHECK:     calll   *({{.*}})
+  __asm call kimport;
+  // CHECK:     calll   *({{.*}})
+
+  // Broken case: Call through a global function pointer.
+  __asm call kptr;
+  // CHECK:     calll   _kptr
+  // CHECK-FIXME: calll   *_kptr
+}
+
+int bar() {
+  // CHECK-LABEL: _bar:
+  __asm jmp k;
+  // CHECK:     jmp     _k
+}
+
+int baz() {
+  // CHECK-LABEL: _baz:
+  __asm mov eax, k;
+  // CHECK: movl    _k, %eax
+  __asm mov eax, kptr;
+  // CHECK: movl    _kptr, %eax
+}
+
+// Test that this asm blob doesn't require more registers than available.  This
+// has to be an LLVM code generation test.
+
+void __declspec(naked) naked() {
+  __asm pusha
+  __asm call k
+  __asm popa
+  __asm ret
+  // CHECK-LABEL: _naked:
+  // CHECK: pushal
+  // CHECK-NEXT: calll _k
+  // CHECK-NEXT: popal
+  // CHECK-NEXT: retl
+}