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Diffstat (limited to 'clang/test/CodeGen/arm-vaarg-align.c')
-rw-r--r-- | clang/test/CodeGen/arm-vaarg-align.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/clang/test/CodeGen/arm-vaarg-align.c b/clang/test/CodeGen/arm-vaarg-align.c new file mode 100644 index 0000000..1187c02 --- /dev/null +++ b/clang/test/CodeGen/arm-vaarg-align.c @@ -0,0 +1,33 @@ +// RUN: %clang_cc1 -triple arm -target-abi aapcs %s -emit-llvm -o - | FileCheck -check-prefix=AAPCS %s +// RUN: %clang_cc1 -triple arm -target-abi apcs-gnu %s -emit-llvm -o - | FileCheck -check-prefix=APCS-GNU %s +/* + * Check that va_arg accesses stack according to ABI alignment + * long long and double require 8-byte alignment under AAPCS + * however, they only require 4-byte alignment under APCS + */ +long long t1(int i, ...) { + // AAPCS: t1 + // APCS-GNU: t1 + __builtin_va_list ap; + __builtin_va_start(ap, i); + // AAPCS: add i32 %{{.*}} 7 + // AAPCS: and i32 %{{.*}} -8 + // APCS-GNU-NOT: add i32 %{{.*}} 7 + // APCS-GNU-NOT: and i32 %{{.*}} -8 + long long ll = __builtin_va_arg(ap, long long); + __builtin_va_end(ap); + return ll; +} +double t2(int i, ...) { + // AAPCS: t2 + // APCS-GNU: t2 + __builtin_va_list ap; + __builtin_va_start(ap, i); + // AAPCS: add i32 %{{.*}} 7 + // AAPCS: and i32 %{{.*}} -8 + // APCS-GNU-NOT: add i32 %{{.*}} 7 + // APCS-GNU-NOT: and i32 %{{.*}} -8 + double ll = __builtin_va_arg(ap, double); + __builtin_va_end(ap); + return ll; +} |