This diff includes changes for supporting the following types.

```

// Primary fixed point types
signed short _Accum s_short_accum;
signed _Accum s_accum;
signed long _Accum s_long_accum;
unsigned short _Accum u_short_accum;
unsigned _Accum u_accum;
unsigned long _Accum u_long_accum;

// Aliased fixed point types
short _Accum short_accum;
_Accum accum;
long _Accum long_accum;

```

This diff only allows for declaration of the fixed point types. Assignment and other operations done on fixed point types according to http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf will be added in future patches. The saturated versions of these types and the equivalent `_Fract` types will also be added in future patches.

The tests included are for asserting that we can declare these types.

Differential Revision: https://reviews.llvm.org/D46084

llvm-svn: 333814

1 files changed, 43 insertions, 0 deletions

diff --git a/clang/test/Frontend/fixed_point_bit_widths.c b/clang/test/Frontend/fixed_point_bit_widths.c
new file mode 100644
index 00000000000..8ad9ffbd6d4
--- /dev/null
+++ b/clang/test/Frontend/fixed_point_bit_widths.c
@@ -0,0 +1,43 @@
+// RUN: %clang -x c -ffixed-point -S -emit-llvm -o - %s | FileCheck %s
+
+int size_SsA = sizeof(signed short _Accum);
+int size_SA  = sizeof(signed _Accum);
+int size_SlA = sizeof(signed long _Accum);
+int align_SsA = __alignof(signed short _Accum);
+int align_SA  = __alignof(signed _Accum);
+int align_SlA = __alignof(signed long _Accum);
+
+int size_UsA = sizeof(unsigned short _Accum);
+int size_UA  = sizeof(unsigned _Accum);
+int size_UlA = sizeof(unsigned long _Accum);
+int align_UsA = __alignof(unsigned short _Accum);
+int align_UA  = __alignof(unsigned _Accum);
+int align_UlA = __alignof(unsigned long _Accum);
+
+int size_sA = sizeof(short _Accum);
+int size_A  = sizeof(_Accum);
+int size_lA = sizeof(long _Accum);
+int align_sA = __alignof(short _Accum);
+int align_A  = __alignof(_Accum);
+int align_lA = __alignof(long _Accum);
+
+// CHECK:      @size_SsA  = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @size_SA   = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @size_SlA  = dso_local global i{{[0-9]+}} 8
+// CHECK-NEXT: @align_SsA = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @align_SA  = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @align_SlA = dso_local global i{{[0-9]+}} 8
+
+// CHECK-NEXT: @size_UsA  = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @size_UA   = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @size_UlA  = dso_local global i{{[0-9]+}} 8
+// CHECK-NEXT: @align_UsA = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @align_UA  = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @align_UlA = dso_local global i{{[0-9]+}} 8
+
+// CHECK-NEXT: @size_sA   = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @size_A    = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @size_lA   = dso_local global i{{[0-9]+}} 8
+// CHECK-NEXT: @align_sA  = dso_local global i{{[0-9]+}} 2
+// CHECK-NEXT: @align_A   = dso_local global i{{[0-9]+}} 4
+// CHECK-NEXT: @align_lA  = dso_local global i{{[0-9]+}} 8