68 lines · c
1// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 42// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s3 4 5typedef struct { struct {} a; } empty;6 7// CHECK-LABEL: define dso_local void @empty_record_test(8// CHECK-SAME: i32 noundef [[Z:%.*]], ...) #[[ATTR0:[0-9]+]] {9// CHECK-NEXT: entry:10// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 411// CHECK-NEXT: [[LIST:%.*]] = alloca [1 x %struct.__va_list_tag], align 1612// CHECK-NEXT: store i32 [[Z]], ptr [[Z_ADDR]], align 413// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 014// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[ARRAYDECAY]])15// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 016// CHECK-NEXT: ret void17//18empty empty_record_test(int z, ...) {19 __builtin_va_list list;20 __builtin_va_start(list, z);21 return __builtin_va_arg(list, empty);22}23 24typedef struct {25 struct{} a;26 double b;27} s1;28 29// CHECK-LABEL: define dso_local double @f(30// CHECK-SAME: i32 noundef [[Z:%.*]], ...) #[[ATTR0]] {31// CHECK-NEXT: entry:32// CHECK-NEXT: [[RETVAL:%.*]] = alloca [[STRUCT_S1:%.*]], align 833// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 434// CHECK-NEXT: [[LIST:%.*]] = alloca [1 x %struct.__va_list_tag], align 1635// CHECK-NEXT: store i32 [[Z]], ptr [[Z_ADDR]], align 436// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 037// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[ARRAYDECAY]])38// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 039// CHECK-NEXT: [[FP_OFFSET_P:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG:%.*]], ptr [[ARRAYDECAY1]], i32 0, i32 140// CHECK-NEXT: [[FP_OFFSET:%.*]] = load i32, ptr [[FP_OFFSET_P]], align 441// CHECK-NEXT: [[FITS_IN_FP:%.*]] = icmp ule i32 [[FP_OFFSET]], 16042// CHECK-NEXT: br i1 [[FITS_IN_FP]], label [[VAARG_IN_REG:%.*]], label [[VAARG_IN_MEM:%.*]]43// CHECK: vaarg.in_reg:44// CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG]], ptr [[ARRAYDECAY1]], i32 0, i32 345// CHECK-NEXT: [[REG_SAVE_AREA:%.*]] = load ptr, ptr [[TMP0]], align 1646// CHECK-NEXT: [[TMP1:%.*]] = getelementptr i8, ptr [[REG_SAVE_AREA]], i32 [[FP_OFFSET]]47// CHECK-NEXT: [[TMP2:%.*]] = add i32 [[FP_OFFSET]], 1648// CHECK-NEXT: store i32 [[TMP2]], ptr [[FP_OFFSET_P]], align 449// CHECK-NEXT: br label [[VAARG_END:%.*]]50// CHECK: vaarg.in_mem:51// CHECK-NEXT: [[OVERFLOW_ARG_AREA_P:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG]], ptr [[ARRAYDECAY1]], i32 0, i32 252// CHECK-NEXT: [[OVERFLOW_ARG_AREA:%.*]] = load ptr, ptr [[OVERFLOW_ARG_AREA_P]], align 853// CHECK-NEXT: [[OVERFLOW_ARG_AREA_NEXT:%.*]] = getelementptr i8, ptr [[OVERFLOW_ARG_AREA]], i32 854// CHECK-NEXT: store ptr [[OVERFLOW_ARG_AREA_NEXT]], ptr [[OVERFLOW_ARG_AREA_P]], align 855// CHECK-NEXT: br label [[VAARG_END]]56// CHECK: vaarg.end:57// CHECK-NEXT: [[VAARG_ADDR:%.*]] = phi ptr [ [[TMP1]], [[VAARG_IN_REG]] ], [ [[OVERFLOW_ARG_AREA]], [[VAARG_IN_MEM]] ]58// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[RETVAL]], ptr align 8 [[VAARG_ADDR]], i64 8, i1 false)59// CHECK-NEXT: [[COERCE_DIVE:%.*]] = getelementptr inbounds nuw [[STRUCT_S1]], ptr [[RETVAL]], i32 0, i32 060// CHECK-NEXT: [[TMP3:%.*]] = load double, ptr [[COERCE_DIVE]], align 861// CHECK-NEXT: ret double [[TMP3]]62//63s1 f(int z, ...) {64 __builtin_va_list list;65 __builtin_va_start(list, z);66 return __builtin_va_arg(list, s1);67}68