clang/test/CodeGenCXX/inalloca-vector.cpp

   1 // RUN: %clang_cc1 -w -triple i686-pc-win32 -emit-llvm -o - %s | FileCheck %s
   2
   3 // PR44395
   4 // MSVC passes up to three vectors in registers, and the rest indirectly. Check
   5 // that both are compatible with an inalloca prototype.
   6
   7 struct NonTrivial {
   8   NonTrivial();
   9   NonTrivial(const NonTrivial &o);
  10   unsigned handle;
  11 };
  12
  13 typedef float __m128 __attribute__((__vector_size__(16), __aligned__(16)));
  14 __m128 gv128;
  15
  16 // nt, w, and q will be in the inalloca pack.
  17 void receive_vec_128(NonTrivial nt, __m128 x, __m128 y, __m128 z, __m128 w, __m128 q) {
  18   gv128 = x + y + z + w + q;
  19 }
  20 // CHECK-LABEL: define dso_local void  @"?receive_vec_128@@YAXUNonTrivial@@T__m128@@1111@Z"
  21 // CHECK-SAME: (<4 x float> inreg noundef %x,
  22 // CHECK-SAME: <4 x float> inreg noundef %y,
  23 // CHECK-SAME: <4 x float> inreg noundef %z,
  24 // CHECK-SAME: <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>* inalloca(<{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>) %0)
  25
  26 void pass_vec_128() {
  27   __m128 z = {0};
  28   receive_vec_128(NonTrivial(), z, z, z, z, z);
  29 }
  30 // CHECK-LABEL: define dso_local void @"?pass_vec_128@@YAXXZ"()
  31 // CHECK: getelementptr inbounds <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>, <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>* %{{[^,]*}}, i32 0, i32 0
  32 // CHECK: call x86_thiscallcc noundef %struct.NonTrivial* @"??0NonTrivial@@QAE@XZ"(%struct.NonTrivial* {{[^,]*}} %{{.*}})
  33
  34 // Store q, store temp alloca.
  35 // CHECK: store <4 x float> %{{[^,]*}}, <4 x float>* %{{[^,]*}}, align 16
  36 // CHECK: getelementptr inbounds <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>, <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>* %{{[^,]*}}, i32 0, i32 1
  37 // CHECK: store <4 x float>* %{{[^,]*}}, <4 x float>** %{{[^,]*}}, align 4
  38
  39 // Store w, store temp alloca.
  40 // CHECK: store <4 x float> %{{[^,]*}}, <4 x float>* %{{[^,]*}}, align 16
  41 // CHECK: getelementptr inbounds <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>, <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>* %{{[^,]*}}, i32 0, i32 2
  42 // CHECK: store <4 x float>* %{{[^,]*}}, <4 x float>** %{{[^,]*}}, align 4
  43
  44 // CHECK: call void @"?receive_vec_128@@YAXUNonTrivial@@T__m128@@1111@Z"
  45 // CHECK-SAME: (<4 x float> inreg noundef %{{[^,]*}},
  46 // CHECK-SAME: <4 x float> inreg noundef %{{[^,]*}},
  47 // CHECK-SAME: <4 x float> inreg noundef %{{[^,]*}},
  48 // CHECK-SAME: <{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>* inalloca(<{ %struct.NonTrivial, <4 x float>*, <4 x float>* }>) %{{[^,]*}})
  49
  50 // w will be passed indirectly by register, and q will be passed indirectly, but
  51 // the pointer will be in memory.
  52 void __fastcall fastcall_receive_vec(__m128 x, __m128 y, __m128 z, __m128 w, int edx, __m128 q, NonTrivial nt) {
  53   gv128 = x + y + z + w + q;
  54 }
  55 // CHECK-LABEL: define dso_local x86_fastcallcc void @"?fastcall_receive_vec@@Y{{[^"]*}}"
  56 // CHECK-SAME: (<4 x float> inreg noundef %x,
  57 // CHECK-SAME: <4 x float> inreg noundef %y,
  58 // CHECK-SAME: <4 x float> inreg noundef %z,
  59 // CHECK-SAME: <4 x float>* inreg noundef %0,
  60 // CHECK-SAME: i32 inreg noundef %edx,
  61 // CHECK-SAME: <{ <4 x float>*, %struct.NonTrivial }>* inalloca(<{ <4 x float>*, %struct.NonTrivial }>) %1)
  62
  63
  64 void __vectorcall vectorcall_receive_vec(double xmm0, double xmm1, double xmm2,
  65                                          __m128 x, __m128 y, __m128 z,
  66                                          __m128 w, int edx, __m128 q, NonTrivial nt) {
  67   gv128 = x + y + z + w + q;
  68 }
  69 // CHECK-LABEL: define dso_local x86_vectorcallcc void @"?vectorcall_receive_vec@@Y{{[^"]*}}"
  70 // CHECK-SAME: (double inreg noundef %xmm0,
  71 // CHECK-SAME: double inreg noundef %xmm1,
  72 // CHECK-SAME: double inreg noundef %xmm2,
  73 // CHECK-SAME: <4 x float> inreg noundef %x,
  74 // CHECK-SAME: <4 x float> inreg noundef %y,
  75 // CHECK-SAME: <4 x float> inreg noundef %z,
  76 // CHECK-SAME: <4 x float>* inreg noundef %0,
  77 // CHECK-SAME: i32 inreg noundef %edx,
  78 // CHECK-SAME: <{ <4 x float>*, %struct.NonTrivial }>* inalloca(<{ <4 x float>*, %struct.NonTrivial }>) %1)