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1// RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-win32 | FileCheck %s --check-prefixes=X86,Win322// RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-win32 | FileCheck %s --check-prefixes=X64,Win643// RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=i386-pc-linux-gnu | FileCheck %s --check-prefixes=X86,Lin324// RUN: %clang_cc1 -emit-llvm %s -o - -ffreestanding -triple=x86_64-pc-linux-gnu | FileCheck %s --check-prefixes=X64,Lin645 6#include <xmmintrin.h>7 8void __regcall v1(int a, int b) {}9// X86: define dso_local x86_regcallcc void @__regcall3__v1(i32 inreg noundef %a, i32 inreg noundef %b)10// X64: define dso_local x86_regcallcc void @__regcall3__v1(i32 noundef %a, i32 noundef %b)11 12void __attribute__((regcall)) v1b(int a, int b) {}13// X86: define dso_local x86_regcallcc void @__regcall3__v1b(i32 inreg noundef %a, i32 inreg noundef %b)14// X64: define dso_local x86_regcallcc void @__regcall3__v1b(i32 noundef %a, i32 noundef %b)15 16void __regcall v2(char a, char b) {}17// X86: define dso_local x86_regcallcc void @__regcall3__v2(i8 inreg noundef signext %a, i8 inreg noundef signext %b)18// Win64: define dso_local x86_regcallcc void @__regcall3__v2(i8 noundef %a, i8 noundef %b)19// Lin64: define dso_local x86_regcallcc void @__regcall3__v2(i8 noundef signext %a, i8 noundef signext %b)20 21struct Small { int x; };22void __regcall v3(int a, struct Small b, int c) {}23// Win32: define dso_local x86_regcallcc void @__regcall3__v3(i32 inreg noundef %a, i32 %b.0, i32 inreg noundef %c)24// Lin32: define dso_local x86_regcallcc void @__regcall3__v3(i32 inreg noundef %a, i32 inreg %0, i32 %b.0, i32 inreg noundef %c)25// X64: define dso_local x86_regcallcc void @__regcall3__v3(i32 noundef %a, i32 %b.coerce, i32 noundef %c)26 27struct Large { int a[5]; };28void __regcall v4(int a, struct Large b, int c) {}29// Win32: define dso_local x86_regcallcc void @__regcall3__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 @__regcall3__v4(i32 inreg noundef %a, ptr noundef byval(%struct.Large) align 4 %b, i32 noundef %c)31// Win64: define dso_local x86_regcallcc void @__regcall3__v4(i32 noundef %a, ptr dead_on_return noundef %b, i32 noundef %c)32// Lin64: define dso_local x86_regcallcc void @__regcall3__v4(i32 noundef %a, [5 x i32] %b.coerce, i32 noundef %c)33 34void __regcall v5(long long a, int b, int c) {}35// X86: define dso_local x86_regcallcc void @__regcall3__v5(i64 noundef %a, i32 inreg noundef %b, i32 inreg noundef %c)36// X64: define dso_local x86_regcallcc void @__regcall3__v5(i64 noundef %a, i32 noundef %b, i32 noundef %c)37 38struct HFA2 { double x, y; };39struct HFA4 { double w, x, y, z; };40struct HFA5 { double v, w, x, y, z; };41 42void __regcall hfa1(int a, struct HFA4 b, int c) {}43// X86: define dso_local x86_regcallcc void @__regcall3__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 @__regcall3__hfa1(i32 noundef %a, double %{{.*}}, double %{{.*}}, double %{{.*}}, double %{{.*}}, i32 noundef %c)45 46// HFAs that would require more than six total SSE registers are passed47// indirectly. Additional vector arguments can consume the rest of the SSE48// registers.49void __regcall hfa2(struct HFA4 a, struct HFA4 b, double c) {}50// X86: define dso_local 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, ptr dead_on_return inreg noundef %0)51// X64: define dso_local x86_regcallcc void @__regcall3__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 the54// SSE register usage.55void __regcall hfa3(double a, double b, double c, double d, double e, struct HFA2 f) {}56// X86: define dso_local x86_regcallcc void @__regcall3__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 @__regcall3__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 special61// handling to ensure alignment.62void __regcall hfa4(struct HFA5 a) {}63// X32: define dso_local x86_regcallcc void @__regcall3__hfa4(ptr noundef byval(%struct.HFA5) align 4 %{{.*}})64// Win64: define dso_local x86_regcallcc void @__regcall3__hfa4(ptr dead_on_return noundef %a)65// Lin64: define dso_local x86_regcallcc void @__regcall3__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.68static struct HFA2 g_hfa2;69struct HFA2 __regcall hfa5(void) { return g_hfa2; }70// X86: define dso_local x86_regcallcc %struct.HFA2 @__regcall3__hfa5()71// X64: define dso_local x86_regcallcc %struct.HFA2 @__regcall3__hfa5()72 73typedef float __attribute__((vector_size(16))) v4f32;74struct HVA2 { v4f32 x, y; };75struct HVA4 { v4f32 w, x, y, z; };76 77void __regcall hva1(int a, struct HVA4 b, int c) {}78// X86: define dso_local x86_regcallcc void @__regcall3__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 @__regcall3__hva1(i32 noundef %a, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}, i32 noundef %c)80 81void __regcall hva2(struct HVA4 a, struct HVA4 b, v4f32 c) {}82// X86: define dso_local 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, ptr dead_on_return inreg noundef %0)83// X64: define dso_local x86_regcallcc void @__regcall3__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 85void __regcall hva3(v4f32 a, v4f32 b, v4f32 c, v4f32 d, v4f32 e, struct HVA2 f) {}86// X86: define dso_local x86_regcallcc void @__regcall3__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 @__regcall3__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 89typedef float __attribute__((ext_vector_type(3))) v3f32;90struct OddSizeHVA { v3f32 x, y; };91 92void __regcall odd_size_hva(struct OddSizeHVA a) {}93// X86: define dso_local x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %a.0, <3 x float> %a.1)94// X64: define dso_local x86_regcallcc void @__regcall3__odd_size_hva(<3 x float> %{{.*}}, <3 x float> %{{.*}})95 96struct HFA6 { __m128 f[4]; };97struct 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 @__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, ptr dead_on_return inreg noundef %c, ptr dead_on_return inreg noundef %d)99// Win64: define dso_local 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)100// Lin64: define dso_local 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)101