ARM/APCS: Don't respect bit-field types when laying out structures.

 - This fixes the last known ABI issues with ARM/APCS.

 - I've run the first 1k ABITests with '--no-unsigned --no-vector --no-complex'
   on {armv6, armv7} x {-mno-thumb, -mthumb}, and the first 10k tests for armv7
   -mthumb, for both function return types and single argument calls. These all
   pass now (they failed horribly before without --no-bitfield).

llvm-svn: 102070

1 files changed, 41 insertions, 8 deletions

diff --git a/clang/test/Sema/arm-layout.c b/clang/test/Sema/arm-layout.c
index 1e239d275a8..42486851042 100644
--- a/clang/test/Sema/arm-layout.c
+++ b/clang/test/Sema/arm-layout.c
@@ -1,20 +1,53 @@
 // RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi apcs-gnu %s -verify
 // RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi aapcs %s -verify
 
-#ifdef __ARM_EABI__
+#define check(name, cond) int _##name##_check[(cond) ? 1 : -1]
 
 struct s0 { char field0; double field1; };
-int g0[sizeof(struct s0) == 16 ? 1 : -1];
+#ifdef __ARM_EABI__
+check(s0_size, sizeof(struct s0) == 16);
+#else
+check(s0_size, sizeof(struct s0) == 12);
+#endif
 
 struct s1 { char field0; long double field1; };
-int g1[sizeof(struct s1) == 16 ? 1 : -1];
-
+#ifdef __ARM_EABI__
+check(s1_size, sizeof(struct s1) == 16);
 #else
+check(s1_size, sizeof(struct s1) == 12);
+#endif
 
-struct s0 { char field0; double field1; };
-int g0[sizeof(struct s0) == 12 ? 1 : -1];
+struct s2 {
+  short field0;
+  int field1 : 24;
+  char field2;
+};
+#ifdef __ARM_EABI__
+check(s2_size, sizeof(struct s2) == 8);
+check(s2_offset_0, __builtin_offsetof(struct s2, field0) == 0);
+check(s2_offset_1, __builtin_offsetof(struct s2, field2) == 7);
+#else
+check(s2_size, sizeof(struct s2) == 6);
+check(s2_offset_0, __builtin_offsetof(struct s2, field0) == 0);
+check(s2_offset_1, __builtin_offsetof(struct s2, field2) == 5);
+#endif
 
-struct s1 { char field0; long double field1; };
-int g1[sizeof(struct s1) == 12 ? 1 : -1];
+struct s3 {
+  short field0;
+  int field1 : 24 __attribute__((aligned(4)));
+  char field2;
+};
+check(s3_size, sizeof(struct s3) == 8);
+check(s3_offset_0, __builtin_offsetof(struct s3, field0) == 0);
+check(s3_offset_1, __builtin_offsetof(struct s3, field2) == 7);
 
+struct s4 {
+  int field0 : 4
+};
+#ifdef __ARM_EABI__
+check(s4_size, sizeof(struct s4) == 4);
+check(s4_align, __alignof(struct s4) == 4);
+#else
+check(s4_size, sizeof(struct s4) == 1);
+check(s4_align, __alignof(struct s4) == 1);
 #endif