clang/test/CodeGen/regcall4.c

   1 // RUN: %clang_cc1 -regcall4 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-win32       | FileCheck %s --check-prefixes=X86,Win32
   2 // RUN: %clang_cc1 -regcall4 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-win32     | FileCheck %s --check-prefixes=X64,Win64
   3 // RUN: %clang_cc1 -regcall4 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-linux-gnu   | FileCheck %s --check-prefixes=X86,Lin32
   4 // RUN: %clang_cc1 -regcall4 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-linux-gnu | FileCheck %s --check-prefixes=X64,Lin64
   5
   6 #include <xmmintrin.h>
   7
   8 void __regcall v1(int a, int b) {}
   9 // X86: define dso_local x86_regcallcc void @__regcall4__v1(i32 inreg noundef %a, i32 inreg noundef %b)
  10 // X64: define dso_local x86_regcallcc void @__regcall4__v1(i32 noundef %a, i32 noundef %b)
  11
  12 void __attribute__((regcall)) v1b(int a, int b) {}
  13 // X86: define dso_local x86_regcallcc void @__regcall4__v1b(i32 inreg noundef %a, i32 inreg noundef %b)
  14 // X64: define dso_local x86_regcallcc void @__regcall4__v1b(i32 noundef %a, i32 noundef %b)
  15
  16 void __regcall v2(char a, char b) {}
  17 // X86: define dso_local x86_regcallcc void @__regcall4__v2(i8 inreg noundef signext %a, i8 inreg noundef signext %b)
  18 // Win64: define dso_local x86_regcallcc void @__regcall4__v2(i8 noundef %a, i8 noundef %b)
  19 // Lin64: define dso_local x86_regcallcc void @__regcall4__v2(i8 noundef signext %a, i8 noundef signext %b)
  20
  21 struct Small { int x; };
  22 void __regcall v3(int a, struct Small b, int c) {}
  23 // Win32: define dso_local x86_regcallcc void @__regcall4__v3(i32 inreg noundef %a, i32 %b.0, i32 inreg noundef %c)
  24 // Lin32: define dso_local x86_regcallcc void @__regcall4__v3(i32 inreg noundef %a, i32 inreg %0, i32 %b.0, i32 inreg noundef %c)
  25 // X64: define dso_local x86_regcallcc void @__regcall4__v3(i32 noundef %a, i32 %b.coerce, i32 noundef %c)
  26
  27 struct Large { int a[5]; };
  28 void __regcall v4(int a, struct Large b, int c) {}
  29 // Win32: define dso_local x86_regcallcc void @__regcall4__v4(i32 inreg noundef %a, ptr noundef byval(%struct.Large) align 4 %b, i32 inreg noundef %c)
  30 // Lin32: define dso_local x86_regcallcc void @__regcall4__v4(i32 inreg noundef %a, ptr noundef byval(%struct.Large) align 4 %b, i32 noundef %c)
  31 // Win64: define dso_local x86_regcallcc void @__regcall4__v4(i32 noundef %a, ptr noundef %b, i32 noundef %c)
  32 // Lin64: define dso_local x86_regcallcc void @__regcall4__v4(i32 noundef %a, [5 x i32] %b.coerce, i32 noundef %c)
  33
  34 void __regcall v5(long long a, int b, int c) {}
  35 // X86: define dso_local x86_regcallcc void @__regcall4__v5(i64 noundef %a, i32 inreg noundef %b, i32 inreg noundef %c)
  36 // X64: define dso_local x86_regcallcc void @__regcall4__v5(i64 noundef %a, i32 noundef %b, i32 noundef %c)
  37
  38 struct HFA2 { double x, y; };
  39 struct HFA4 { double w, x, y, z; };
  40 struct HFA5 { double v, w, x, y, z; };
  41
  42 void __regcall hfa1(int a, struct HFA4 b, int c) {}
  43 // X86: define dso_local x86_regcallcc void @__regcall4__hfa1(i32 inreg noundef %a, double %b.0, double %b.1, double %b.2, double %b.3, i32 inreg noundef %c)
  44 // X64: define dso_local x86_regcallcc void @__regcall4__hfa1(i32 noundef %a, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, i32 noundef %c)
  45
  46 // HFAs that would require more than six total SSE registers are passed
  47 // indirectly. Additional vector arguments can consume the rest of the SSE
  48 // registers.
  49 void __regcall hfa2(struct HFA4 a, struct HFA4 b, double c) {}
  50 // X86: define dso_local x86_regcallcc void @__regcall4__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, ptr inreg noundef %0)
  51 // X64: define dso_local x86_regcallcc void @__regcall4__hfa2(double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, double noundef %c)
  52
  53 // Ensure that we pass builtin types directly while counting them against the
  54 // SSE register usage.
  55 void __regcall hfa3(double a, double b, double c, double d, double e, struct HFA2 f) {}
  56 // X86: define dso_local x86_regcallcc void @__regcall4__hfa3(double noundef %a, double noundef %b, double noundef %c, double noundef %d, double noundef %e, double %f.0, double %f.1)
  57 // X64: define dso_local x86_regcallcc void @__regcall4__hfa3(double noundef %a, double noundef %b, double noundef %c, double noundef %d, double noundef %e, double %{{.*}}, double %{{.*}})
  58
  59 // Aggregates with more than four elements are not HFAs and are passed byval(%b.3, double noundef).
  60 // Because they are not classified as homogeneous, they don't get special
  61 // handling to ensure alignment.
  62 void __regcall hfa4(struct HFA5 a) {}
  63 // X32: define dso_local x86_regcallcc void @__regcall4__hfa4(ptr noundef byval(%struct.HFA5) align 4 %{{.*}})
  64 // Win64: define dso_local x86_regcallcc void @__regcall4__hfa4(ptr noundef %a)
  65 // Lin64: define dso_local x86_regcallcc void @__regcall4__hfa4(double %a.coerce0, double %a.coerce1, double %a.coerce2, double %a.coerce3, double %a.coerce4)
  66
  67 // Return HFAs of 4 or fewer elements in registers.
  68 static struct HFA2 g_hfa2;
  69 struct HFA2 __regcall hfa5(void) { return g_hfa2; }
  70 // X86: define dso_local x86_regcallcc %struct.HFA2 @__regcall4__hfa5()
  71 // X64: define dso_local x86_regcallcc %struct.HFA2 @__regcall4__hfa5()
  72
  73 typedef float __attribute__((vector_size(16))) v4f32;
  74 struct HVA2 { v4f32 x, y; };
  75 struct HVA4 { v4f32 w, x, y, z; };
  76
  77 void __regcall hva1(int a, struct HVA4 b, int c) {}
  78 // X86: define dso_local x86_regcallcc void @__regcall4__hva1(i32 inreg noundef %a, <4 x float> %b.0, <4 x float> %b.1, <4 x float> %b.2, <4 x float> %b.3, i32 inreg noundef %c)
  79 // X64: define dso_local x86_regcallcc void @__regcall4__hva1(i32 noundef %a, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, i32 noundef %c)
  80
  81 void __regcall hva2(struct HVA4 a, struct HVA4 b, v4f32 c) {}
  82 // X86: define dso_local x86_regcallcc void @__regcall4__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, ptr inreg noundef %0)
  83 // X64: define dso_local x86_regcallcc void @__regcall4__hva2(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> noundef %c)
  84
  85 void __regcall hva3(v4f32 a, v4f32 b, v4f32 c, v4f32 d, v4f32 e, struct HVA2 f) {}
  86 // X86: define dso_local x86_regcallcc void @__regcall4__hva3(<4 x float> noundef %a, <4 x float> noundef %b, <4 x float> noundef %c, <4 x float> noundef %d, <4 x float> noundef %e, <4 x float> %f.0, <4 x float> %f.1)
  87 // X64: define dso_local x86_regcallcc void @__regcall4__hva3(<4 x float> noundef %a, <4 x float> noundef %b, <4 x float> noundef %c, <4 x float> noundef %d, <4 x float> noundef %e, <4 x float> %{{.*}}, <4 x float> %{{.*}})
  88
  89 typedef float __attribute__((ext_vector_type(3))) v3f32;
  90 struct OddSizeHVA { v3f32 x, y; };
  91
  92 void __regcall odd_size_hva(struct OddSizeHVA a) {}
  93 // X86: define dso_local x86_regcallcc void @__regcall4__odd_size_hva(<3 x float> %a.0, <3 x float> %a.1)
  94 // X64: define dso_local x86_regcallcc void @__regcall4__odd_size_hva(<3 x float> %{{.*}}, <3 x float> %{{.*}})
  95
  96 struct HFA6 { __m128 f[4]; };
  97 struct HFA6 __regcall ret_reg_reused(struct HFA6 a, struct HFA6 b, struct HFA6 c, struct HFA6 d){ struct HFA6 h; return h;}
  98 // X86: define dso_local x86_regcallcc %struct.HFA6 @__regcall4__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, ptr inreg noundef %c, ptr inreg noundef %d)
  99 // Win64: define dso_local x86_regcallcc %struct.HFA6 @__regcall4__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)
 100 // Lin64: define dso_local x86_regcallcc %struct.HFA6 @__regcall4__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)