1 // RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-win32       | FileCheck %s --check-prefix=Win32
2 // RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-win32     | FileCheck %s --check-prefix=Win64
3 // RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-linux-gnu   | FileCheck %s --check-prefix=Lin32
4 // RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-linux-gnu | FileCheck %s --check-prefix=Lin64
5 
6 #include <xmmintrin.h>
7 
8 void __regcall v1(int a, int b) {}
9 // Win32: define x86_regcallcc void @__regcall3__v1(i32 inreg %a, i32 inreg %b)
10 // Win64: define x86_regcallcc void @__regcall3__v1(i32 %a, i32 %b)
11 // Lin32: define x86_regcallcc void @__regcall3__v1(i32 inreg %a, i32 inreg %b)
12 // Lin64: define x86_regcallcc void @__regcall3__v1(i32 %a, i32 %b)
13 
14 void __attribute__((regcall)) v1b(int a, int b) {}
15 // Win32: define x86_regcallcc void @__regcall3__v1b(i32 inreg %a, i32 inreg %b)
16 // Win64: define x86_regcallcc void @__regcall3__v1b(i32 %a, i32 %b)
17 // Lin32: define x86_regcallcc void @__regcall3__v1b(i32 inreg %a, i32 inreg %b)
18 // Lin64: define x86_regcallcc void @__regcall3__v1b(i32 %a, i32 %b)
19 
20 void __regcall v2(char a, char b) {}
21 // Win32: define x86_regcallcc void @__regcall3__v2(i8 inreg signext %a, i8 inreg signext %b)
22 // Win64: define x86_regcallcc void @__regcall3__v2(i8 %a, i8 %b)
23 // Lin32: define x86_regcallcc void @__regcall3__v2(i8 inreg signext %a, i8 inreg signext %b)
24 // Lin64: define x86_regcallcc void @__regcall3__v2(i8 signext %a, i8 signext %b)
25 
26 struct Small { int x; };
27 void __regcall v3(int a, struct Small b, int c) {}
28 // Win32: define x86_regcallcc void @__regcall3__v3(i32 inreg %a, i32 %b.0, i32 inreg %c)
29 // Win64: define x86_regcallcc void @__regcall3__v3(i32 %a, i32 %b.coerce, i32 %c)
30 // Lin32: define x86_regcallcc void @__regcall3__v3(i32 inreg %a, i32 inreg, i32 %b.0, i32 inreg %c)
31 // Lin64: define x86_regcallcc void @__regcall3__v3(i32 %a, i32 %b.coerce, i32 %c)
32 
33 struct Large { int a[5]; };
34 void __regcall v4(int a, struct Large b, int c) {}
35 // Win32: define x86_regcallcc void @__regcall3__v4(i32 inreg %a, %struct.Large* byval align 4 %b, i32 inreg %c)
36 // Win64: define x86_regcallcc void @__regcall3__v4(i32 %a, %struct.Large* %b, i32 %c)
37 // Lin32: define x86_regcallcc void @__regcall3__v4(i32 inreg %a, %struct.Large* byval align 4 %b, i32 %c)
38 // Lin64: define x86_regcallcc void @__regcall3__v4(i32 %a, [5 x i32] %b.coerce, i32 %c)
39 
40 struct HFA2 { double x, y; };
41 struct HFA4 { double w, x, y, z; };
42 struct HFA5 { double v, w, x, y, z; };
43 
44 void __regcall hfa1(int a, struct HFA4 b, int c) {}
45 // Win32: define x86_regcallcc void @__regcall3__hfa1(i32 inreg %a, double %b.0, double %b.1, double %b.2, double %b.3, i32 inreg %c)
46 // Win64: define x86_regcallcc void @__regcall3__hfa1(i32 %a, double %b.0, double %b.1, double %b.2, double %b.3, i32 %c)
47 // Lin32: define x86_regcallcc void @__regcall3__hfa1(i32 inreg %a, double %b.0, double %b.1, double %b.2, double %b.3, i32 inreg %c)
48 // Lin64: define x86_regcallcc void @__regcall3__hfa1(i32 %a, double %b.coerce0, double %b.coerce1, double %b.coerce2, double %b.coerce3, i32 %c)
49 
50 // HFAs that would require more than six total SSE registers are passed
51 // indirectly. Additional vector arguments can consume the rest of the SSE
52 // registers.
53 void __regcall hfa2(struct HFA4 a, struct HFA4 b, double c) {}
54 // Win32: define x86_regcallcc void @__regcall3__hfa2(double %a.0, double %a.1, double %a.2, double %a.3, double %b.0, double %b.1, double %b.2, double %b.3, double* inreg)
55 // Win64: define x86_regcallcc void @__regcall3__hfa2(double %a.0, double %a.1, double %a.2, double %a.3, double %b.0, double %b.1, double %b.2, double %b.3, double %c)
56 // Lin32: define x86_regcallcc void @__regcall3__hfa2(double %a.0, double %a.1, double %a.2, double %a.3, double %b.0, double %b.1, double %b.2, double %b.3, double* inreg)
57 // Lin64: define x86_regcallcc void @__regcall3__hfa2(double %a.coerce0, double %a.coerce1, double %a.coerce2, double %a.coerce3, double %b.coerce0, double %b.coerce1, double %b.coerce2, double %b.coerce3, double %c)
58 
59 // Ensure that we pass builtin types directly while counting them against the
60 // SSE register usage.
61 void __regcall hfa3(double a, double b, double c, double d, double e, struct HFA2 f) {}
62 // Win32: define x86_regcallcc void @__regcall3__hfa3(double %a, double %b, double %c, double %d, double %e, double %f.0, double %f.1)
63 // Win64: define x86_regcallcc void @__regcall3__hfa3(double %a, double %b, double %c, double %d, double %e, double %f.0, double %f.1)
64 // Lin32: define x86_regcallcc void @__regcall3__hfa3(double %a, double %b, double %c, double %d, double %e, double %f.0, double %f.1)
65 // Lin64: define x86_regcallcc void @__regcall3__hfa3(double %a, double %b, double %c, double %d, double %e, double %f.coerce0, double %f.coerce1)
66 
67 // Aggregates with more than four elements are not HFAs and are passed byval.
68 // Because they are not classified as homogeneous, they don't get special
69 // handling to ensure alignment.
70 void __regcall hfa4(struct HFA5 a) {}
71 // Win32: define x86_regcallcc void @__regcall3__hfa4(%struct.HFA5* byval align 4)
72 // Win64: define x86_regcallcc void @__regcall3__hfa4(%struct.HFA5* %a)
73 // Lin32: define x86_regcallcc void @__regcall3__hfa4(%struct.HFA5* byval align 4 %a)
74 // Lin64: define x86_regcallcc void @__regcall3__hfa4(double %a.coerce0, double %a.coerce1, double %a.coerce2, double %a.coerce3, double %a.coerce4)
75 
76 // Return HFAs of 4 or fewer elements in registers.
77 static struct HFA2 g_hfa2;
78 struct HFA2 __regcall hfa5(void) { return g_hfa2; }
79 // Win32: define x86_regcallcc %struct.HFA2 @__regcall3__hfa5()
80 // Win64: define x86_regcallcc %struct.HFA2 @__regcall3__hfa5()
81 // Lin32: define x86_regcallcc %struct.HFA2 @__regcall3__hfa5()
82 // Lin64: define x86_regcallcc %struct.HFA2 @__regcall3__hfa5()
83 
84 typedef float __attribute__((vector_size(16))) v4f32;
85 struct HVA2 { v4f32 x, y; };
86 struct HVA4 { v4f32 w, x, y, z; };
87 
88 void __regcall hva1(int a, struct HVA4 b, int c) {}
89 // Win32: define x86_regcallcc void @__regcall3__hva1(i32 inreg %a, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, i32 inreg %c)
90 // Win64: define x86_regcallcc void @__regcall3__hva1(i32 %a, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, i32 %c)
91 // Lin32: define x86_regcallcc void @__regcall3__hva1(i32 inreg %a, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, i32 inreg %c)
92 // Lin64: define x86_regcallcc void @__regcall3__hva1(i32 %a, <4 x float> %b.coerce0, <4 x float> %b.coerce1, <4 x float> %b.coerce2, <4 x float> %b.coerce3, i32 %c)
93 
94 void __regcall hva2(struct HVA4 a, struct HVA4 b, v4f32 c) {}
95 // Win32: define x86_regcallcc void @__regcall3__hva2(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, <4 x float>* inreg)
96 // Win64: define x86_regcallcc void @__regcall3__hva2(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, <4 x float> %c)
97 // Lin32: define x86_regcallcc void @__regcall3__hva2(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, <4 x float>* inreg)
98 // Lin64: define x86_regcallcc void @__regcall3__hva2(<4 x float> %a.coerce0, <4 x float> %a.coerce1, <4 x float> %a.coerce2, <4 x float> %a.coerce3, <4 x float> %b.coerce0, <4 x float> %b.coerce1, <4 x float> %b.coerce2, <4 x float> %b.coerce3, <4 x float> %c)
99 
100 void __regcall hva3(v4f32 a, v4f32 b, v4f32 c, v4f32 d, v4f32 e, struct HVA2 f) {}
101 // Win32: define x86_regcallcc void @__regcall3__hva3(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, <4 x float> %e, <4 x float> %f.0, <4 x float> %f.1)
102 // Win64: define x86_regcallcc void @__regcall3__hva3(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, <4 x float> %e, <4 x float> %f.0, <4 x float> %f.1)
103 // Lin32: define x86_regcallcc void @__regcall3__hva3(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, <4 x float> %e, <4 x float> %f.0, <4 x float> %f.1)
104 // Lin64: define x86_regcallcc void @__regcall3__hva3(<4 x float> %a, <4 x float> %b, <4 x float> %c, <4 x float> %d, <4 x float> %e, <4 x float> %f.coerce0, <4 x float> %f.coerce1)
105 
106 typedef float __attribute__((ext_vector_type(3))) v3f32;
107 struct OddSizeHVA { v3f32 x, y; };
108 
109 void __regcall odd_size_hva(struct OddSizeHVA a) {}
110 // Win32: define x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %a.0, <3 x float> %a.1)
111 // Win64: define x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %a.0, <3 x float> %a.1)
112 // Lin32: define x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %a.0, <3 x float> %a.1)
113 // Lin64: define x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %a.coerce0, <3 x float> %a.coerce1)
114 
115 struct HFA6 { __m128 f[4]; };
116 struct HFA6 __regcall ret_reg_reused(struct HFA6 a, struct HFA6 b, struct HFA6 c, struct HFA6 d){ struct HFA6 h; return h;}
117 // Win32: define x86_regcallcc %struct.HFA6 @__regcall3__ret_reg_reused(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, %struct.HFA6* inreg %c, %struct.HFA6* inreg %d)
118 // Win64: define x86_regcallcc %struct.HFA6 @__regcall3__ret_reg_reused(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, <4 x float> %c.0, <4 x float> %c.1, <4 x float> %c.2, <4 x float> %c.3, <4 x float> %d.0, <4 x float> %d.1, <4 x float> %d.2, <4 x float> %d.3)
119 // Lin32: define x86_regcallcc %struct.HFA6 @__regcall3__ret_reg_reused(<4 x float> %a.0, <4 x float> %a.1, <4 x float> %a.2, <4 x float> %a.3, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, %struct.HFA6* inreg %c, %struct.HFA6* inreg %d)
120 // Lin64: define x86_regcallcc %struct.HFA6 @__regcall3__ret_reg_reused([4 x <4 x float>] %a.coerce, [4 x <4 x float>] %b.coerce, [4 x <4 x float>] %c.coerce, [4 x <4 x float>] %d.coerce)
121