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llvm/clang/test/CodeGen/amdgpu-variadic-call.c 

// REQUIRES: amdgpu-registered-target
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature
// RUN: %clang_cc1 -cc1 -std=c23 -triple amdgcn-amd-amdhsa -emit-llvm -O1 %s -o - | FileCheck %s

void sink_0(...);
void sink_1(int, ...);
void sink_2(double, int, ...);

// Simple scalar values

// CHECK-LABEL: define {{[^@]+}}@zero_varargs
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0() #[[ATTR2:[0-9]+]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void zero_varargs(int f0, double f1)
{
  sink_0();
  sink_1(f0);
  sink_2(f1, f0);
}

// CHECK-LABEL: define {{[^@]+}}@one_i32
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i32 noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(i32 noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], i32 noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], i32 noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_i32(int f0, double f1, int v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_ptr
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], ptr noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(ptr noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], ptr noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], ptr noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_ptr(int f0, double f1, void* v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_f64
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], double noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(double noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], double noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], double noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_f64(int f0, double f1, double v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}


// C has various type promotion rules for variadics

// CHECK-LABEL: define {{[^@]+}}@one_i8
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i8 noundef signext [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[CONV:%.*]] = sext i8 [[V0]] to i32
// CHECK-NEXT:    tail call void (...) @sink_0(i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_i8(int f0, double f1, char v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_i16
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i16 noundef signext [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[CONV:%.*]] = sext i16 [[V0]] to i32
// CHECK-NEXT:    tail call void (...) @sink_0(i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], i32 noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_i16(int f0, double f1, short v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_f32
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], float noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[CONV:%.*]] = fpext float [[V0]] to double
// CHECK-NEXT:    tail call void (...) @sink_0(double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_f32(int f0, double f1, float v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}


// Various half types. _Float16 is passed as half and __fp16 as double

// CHECK-LABEL: define {{[^@]+}}@one_f16a
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], half noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(half noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], half noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], half noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_f16a(int f0, double f1, _Float16 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_f16b
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], half noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[CONV:%.*]] = fpext half [[V0]] to double
// CHECK-NEXT:    tail call void (...) @sink_0(double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], double noundef [[CONV]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_f16b(int f0, double f1, __fp16 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// CHECK-LABEL: define {{[^@]+}}@one_f16c
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], bfloat noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(bfloat noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], bfloat noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], bfloat noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_f16c(int f0, double f1, __bf16 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// Simple composites

typedef struct
{
  double x0;
  double x1;
} pair_f64;

// CHECK-LABEL: define {{[^@]+}}@one_pair_f64
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], double [[V0_COERCE0:%.*]], double [[V0_COERCE1:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[DOTFCA_0_INSERT:%.*]] = insertvalue [[STRUCT_PAIR_F64:%.*]] poison, double [[V0_COERCE0]], 0
// CHECK-NEXT:    [[DOTFCA_1_INSERT:%.*]] = insertvalue [[STRUCT_PAIR_F64]] [[DOTFCA_0_INSERT]], double [[V0_COERCE1]], 1
// CHECK-NEXT:    tail call void (...) @sink_0([[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], [[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], [[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_pair_f64(int f0, double f1, pair_f64 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

typedef double v2f64 __attribute__((ext_vector_type(2)));

// CHECK-LABEL: define {{[^@]+}}@one_pair_v2f64
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], <2 x double> noundef [[V0:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(<2 x double> noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], <2 x double> noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], <2 x double> noundef [[V0]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_pair_v2f64(int f0, double f1, v2f64 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

typedef union
{
  float x0;
  int x1;
} union_f32_i32;

// CHECK-LABEL: define {{[^@]+}}@one_pair_union_f32_i32
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i32 [[V0_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[TMP0:%.*]] = bitcast i32 [[V0_COERCE]] to float
// CHECK-NEXT:    [[DOTFCA_0_INSERT:%.*]] = insertvalue [[UNION_UNION_F32_I32:%.*]] poison, float [[TMP0]], 0
// CHECK-NEXT:    tail call void (...) @sink_0([[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], [[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], [[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_pair_union_f32_i32(int f0, double f1, union_f32_i32 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

typedef union
{
  int x0;
  float x1;
} transparent_union_f32_i32 __attribute__((transparent_union));

// CHECK-LABEL: define {{[^@]+}}@one_pair_transparent_union_f32_i32
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i32 [[V0_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[DOTFCA_0_INSERT:%.*]] = insertvalue [[UNION_TRANSPARENT_UNION_F32_I32:%.*]] poison, i32 [[V0_COERCE]], 0
// CHECK-NEXT:    tail call void (...) @sink_0([[UNION_TRANSPARENT_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], [[UNION_TRANSPARENT_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], [[UNION_TRANSPARENT_UNION_F32_I32]] [[DOTFCA_0_INSERT]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void one_pair_transparent_union_f32_i32(int f0, double f1, transparent_union_f32_i32 v0)
{
  sink_0(v0);
  sink_1(f0, v0);
  sink_2(f1, f0, v0);
}

// Passing multiple values in the variadic pack

// CHECK-LABEL: define {{[^@]+}}@multiple_one
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], i32 noundef [[V0:%.*]], double noundef [[V1:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    tail call void (...) @sink_0(i32 noundef [[V0]], double noundef [[V1]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], i32 noundef [[V0]], double noundef [[V1]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], i32 noundef [[V0]], double noundef [[V1]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void multiple_one(int f0, double f1, int v0, double v1)
{
  sink_0(v0, v1);
  sink_1(f0, v0, v1);
  sink_2(f1, f0, v0, v1);
}

// CHECK-LABEL: define {{[^@]+}}@multiple_two
// CHECK-SAME: (i32 noundef [[F0:%.*]], double noundef [[F1:%.*]], double [[V0_COERCE0:%.*]], double [[V0_COERCE1:%.*]], float noundef [[V1:%.*]], i32 [[V2_COERCE:%.*]], i32 noundef [[V3:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[TMP0:%.*]] = bitcast i32 [[V2_COERCE]] to float
// CHECK-NEXT:    [[CONV:%.*]] = fpext float [[V1]] to double
// CHECK-NEXT:    [[DOTFCA_0_INSERT16:%.*]] = insertvalue [[STRUCT_PAIR_F64:%.*]] poison, double [[V0_COERCE0]], 0
// CHECK-NEXT:    [[DOTFCA_1_INSERT:%.*]] = insertvalue [[STRUCT_PAIR_F64]] [[DOTFCA_0_INSERT16]], double [[V0_COERCE1]], 1
// CHECK-NEXT:    [[DOTFCA_0_INSERT:%.*]] = insertvalue [[UNION_UNION_F32_I32:%.*]] poison, float [[TMP0]], 0
// CHECK-NEXT:    tail call void (...) @sink_0([[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]], double noundef [[CONV]], [[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]], i32 noundef [[V3]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (i32, ...) @sink_1(i32 noundef [[F0]], [[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]], double noundef [[CONV]], [[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]], i32 noundef [[V3]]) #[[ATTR2]]
// CHECK-NEXT:    tail call void (double, i32, ...) @sink_2(double noundef [[F1]], i32 noundef [[F0]], [[STRUCT_PAIR_F64]] [[DOTFCA_1_INSERT]], double noundef [[CONV]], [[UNION_UNION_F32_I32]] [[DOTFCA_0_INSERT]], i32 noundef [[V3]]) #[[ATTR2]]
// CHECK-NEXT:    ret void
//
void multiple_two(int f0, double f1, pair_f64 v0, float v1, union_f32_i32 v2, int v3)
{
  sink_0(v0, v1, v2, v3);
  sink_1(f0, v0, v1, v2, v3);
  sink_2(f1, f0, v0, v1, v2, v3);
}