derek.holloway
7502bf64a4
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67 lines
3.5 KiB
C
67 lines
3.5 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
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typedef struct { struct {} a; } empty;
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// CHECK-LABEL: define dso_local void @empty_record_test(
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// CHECK-SAME: i32 noundef [[Z:%.*]], ...) #[[ATTR0:[0-9]+]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[LIST:%.*]] = alloca [1 x %struct.__va_list_tag], align 16
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// CHECK-NEXT: store i32 [[Z]], ptr [[Z_ADDR]], align 4
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 0
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// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[ARRAYDECAY]])
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// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 0
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// CHECK-NEXT: ret void
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//
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empty empty_record_test(int z, ...) {
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__builtin_va_list list;
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__builtin_va_start(list, z);
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return __builtin_va_arg(list, empty);
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}
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typedef struct {
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struct{} a;
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double b;
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} s1;
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// CHECK-LABEL: define dso_local double @f(
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// CHECK-SAME: i32 noundef [[Z:%.*]], ...) #[[ATTR0]] {
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[RETVAL:%.*]] = alloca [[STRUCT_S1:%.*]], align 8
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// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[LIST:%.*]] = alloca [1 x %struct.__va_list_tag], align 16
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// CHECK-NEXT: store i32 [[Z]], ptr [[Z_ADDR]], align 4
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 0
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// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[ARRAYDECAY]])
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// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [1 x %struct.__va_list_tag], ptr [[LIST]], i64 0, i64 0
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// CHECK-NEXT: [[FP_OFFSET_P:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG:%.*]], ptr [[ARRAYDECAY1]], i32 0, i32 1
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// CHECK-NEXT: [[FP_OFFSET:%.*]] = load i32, ptr [[FP_OFFSET_P]], align 4
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// CHECK-NEXT: [[FITS_IN_FP:%.*]] = icmp ule i32 [[FP_OFFSET]], 160
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// CHECK-NEXT: br i1 [[FITS_IN_FP]], label [[VAARG_IN_REG:%.*]], label [[VAARG_IN_MEM:%.*]]
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// CHECK: vaarg.in_reg:
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// CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG]], ptr [[ARRAYDECAY1]], i32 0, i32 3
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// CHECK-NEXT: [[REG_SAVE_AREA:%.*]] = load ptr, ptr [[TMP0]], align 16
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// CHECK-NEXT: [[TMP1:%.*]] = getelementptr i8, ptr [[REG_SAVE_AREA]], i32 [[FP_OFFSET]]
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// CHECK-NEXT: [[TMP2:%.*]] = add i32 [[FP_OFFSET]], 16
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// CHECK-NEXT: store i32 [[TMP2]], ptr [[FP_OFFSET_P]], align 4
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// CHECK-NEXT: br label [[VAARG_END:%.*]]
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// CHECK: vaarg.in_mem:
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// CHECK-NEXT: [[OVERFLOW_ARG_AREA_P:%.*]] = getelementptr inbounds nuw [[STRUCT___VA_LIST_TAG]], ptr [[ARRAYDECAY1]], i32 0, i32 2
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// CHECK-NEXT: [[OVERFLOW_ARG_AREA:%.*]] = load ptr, ptr [[OVERFLOW_ARG_AREA_P]], align 8
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// CHECK-NEXT: [[OVERFLOW_ARG_AREA_NEXT:%.*]] = getelementptr i8, ptr [[OVERFLOW_ARG_AREA]], i32 8
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// CHECK-NEXT: store ptr [[OVERFLOW_ARG_AREA_NEXT]], ptr [[OVERFLOW_ARG_AREA_P]], align 8
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// CHECK-NEXT: br label [[VAARG_END]]
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// CHECK: vaarg.end:
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// CHECK-NEXT: [[VAARG_ADDR:%.*]] = phi ptr [ [[TMP1]], [[VAARG_IN_REG]] ], [ [[OVERFLOW_ARG_AREA]], [[VAARG_IN_MEM]] ]
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[RETVAL]], ptr align 8 [[VAARG_ADDR]], i64 8, i1 false)
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// CHECK-NEXT: [[TMP3:%.*]] = load double, ptr [[RETVAL]], align 8
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// CHECK-NEXT: ret double [[TMP3]]
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//
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s1 f(int z, ...) {
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__builtin_va_list list;
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__builtin_va_start(list, z);
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return __builtin_va_arg(list, s1);
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}
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