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      1 // RUN: %clang_cc1 -triple thumbv7k-apple-watchos2.0 -target-abi aapcs16 -target-cpu cortex-a7 %s -o - -emit-llvm | FileCheck %s
      2 
      3 #include <arm_neon.h>
      4 
      5 // Make sure 64 and 128 bit types are naturally aligned by the v7k ABI:
      6 
      7 // CHECK: target datalayout = "e-m:o-p:32:32-i64:64-a:0:32-n32-S128"
      8 
      9 typedef struct {
     10   float arr[4];
     11 } HFA;
     12 
     13 // CHECK: define void @simple_hfa([4 x float] %h.coerce)
     14 void simple_hfa(HFA h) {}
     15 
     16 // CHECK: define %struct.HFA @return_simple_hfa
     17 HFA return_simple_hfa() {}
     18 
     19 typedef struct {
     20   double arr[4];
     21 } BigHFA;
     22 
     23 // We don't want any padding type to be included by Clang when using the
     24 // APCS-VFP ABI, that needs to be handled by LLVM if needed.
     25 
     26 // CHECK: void @no_padding(i32 %r0, i32 %r1, i32 %r2, [4 x double] %d0_d3.coerce, [4 x double] %d4_d7.coerce, [4 x double] %sp.coerce, i64 %split)
     27 void no_padding(int r0, int r1, int r2, BigHFA d0_d3, BigHFA d4_d7, BigHFA sp,
     28                 long long split) {}
     29 
     30 // Structs larger than 16 bytes should be passed indirectly in space allocated
     31 // by the caller (a pointer to this storage should be what occurs in the arg
     32 // list).
     33 
     34 typedef struct {
     35   float x;
     36   long long y;
     37   double z;
     38 } BigStruct;
     39 
     40 // CHECK: define void @big_struct_indirect(%struct.BigStruct* %b)
     41 void big_struct_indirect(BigStruct b) {}
     42 
     43 // CHECK: define void @return_big_struct_indirect(%struct.BigStruct* noalias sret
     44 BigStruct return_big_struct_indirect() {}
     45 
     46 // Structs smaller than 16 bytes should be passed directly, and coerced to
     47 // either [N x i32] or [N x i64] depending on alignment requirements.
     48 
     49 typedef struct {
     50   float x;
     51   int y;
     52   double z;
     53 } SmallStruct;
     54 
     55 // CHECK: define void @small_struct_direct([2 x i64] %s.coerce)
     56 void small_struct_direct(SmallStruct s) {}
     57 
     58 // CHECK: define [4 x i32] @return_small_struct_direct()
     59 SmallStruct return_small_struct_direct() {}
     60 
     61 typedef struct {
     62   float x;
     63   int y;
     64   int z;
     65 } SmallStructSmallAlign;
     66 
     67 // CHECK: define void @small_struct_align_direct([3 x i32] %s.coerce)
     68 void small_struct_align_direct(SmallStructSmallAlign s) {}
     69 
     70 typedef struct {
     71   char x;
     72   short y;
     73 } PaddedSmallStruct;
     74 
     75 // CHECK: define i32 @return_padded_small_struct()
     76 PaddedSmallStruct return_padded_small_struct() {}
     77 
     78 typedef struct {
     79   char arr[7];
     80 } OddlySizedStruct;
     81 
     82 // CHECK: define [2 x i32] @return_oddly_sized_struct()
     83 OddlySizedStruct return_oddly_sized_struct() {}
     84 
     85 // CHECK: define <4 x float> @test_va_arg_vec(i8* %l)
     86 // CHECK:   [[ALIGN_TMP:%.*]] = add i32 {{%.*}}, 15
     87 // CHECK:   [[ALIGNED:%.*]] = and i32 [[ALIGN_TMP]], -16
     88 // CHECK:   [[ALIGNED_I8:%.*]] = inttoptr i32 [[ALIGNED]] to i8*
     89 // CHECK:   [[ALIGNED_VEC:%.*]] = bitcast i8* [[ALIGNED_I8]] to <4 x float>
     90 // CHECK:   load <4 x float>, <4 x float>* [[ALIGNED_VEC]], align 16
     91 float32x4_t test_va_arg_vec(__builtin_va_list l) {
     92   return __builtin_va_arg(l, float32x4_t);
     93 }
     94