118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
// RUN: %clang_cc1 -triple arm64_32-apple-ios7.0 -target-abi darwinpcs -emit-llvm -o - -O1 -ffreestanding %s | FileCheck %s
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#include <stdarg.h>
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typedef struct {
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int a;
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} OneInt;
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// No realignment should be needed here: slot size is 4 bytes.
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int test_int(OneInt input, va_list *mylist) {
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// CHECK-LABEL: define{{.*}} i32 @test_int(i32 %input
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// CHECK: [[START:%.*]] = load i8*, i8** %mylist
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// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[START]], i32 4
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// CHECK: store i8* [[NEXT]], i8** %mylist
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// CHECK: [[ADDR_I32:%.*]] = bitcast i8* [[START]] to i32*
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// CHECK: [[RES:%.*]] = load i32, i32* [[ADDR_I32]]
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// CHECK: ret i32 [[RES]]
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return va_arg(*mylist, OneInt).a;
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}
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typedef struct {
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long long a;
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} OneLongLong;
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// Minimum slot size is 4 bytes, so address needs rounding up to multiple of 8.
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long long test_longlong(OneLongLong input, va_list *mylist) {
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// CHECK-LABEL: define{{.*}} i64 @test_longlong(i64 %input
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// CHECK: [[STARTPTR:%.*]] = load i8*, i8** %mylist
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// CHECK: [[START:%.*]] = ptrtoint i8* [[STARTPTR]] to i32
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// CHECK: [[ALIGN_TMP:%.*]] = add i32 [[START]], 7
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// CHECK: [[ALIGNED:%.*]] = and i32 [[ALIGN_TMP]], -8
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// CHECK: [[ALIGNED_ADDR:%.*]] = inttoptr i32 [[ALIGNED]] to i8*
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// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[ALIGNED_ADDR]], i32 8
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// CHECK: store i8* [[NEXT]], i8** %mylist
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// CHECK: [[ADDR_STRUCT:%.*]] = inttoptr i32 [[ALIGNED]] to %struct.OneLongLong*
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// CHECK: [[ADDR_I64:%.*]] = getelementptr inbounds %struct.OneLongLong, %struct.OneLongLong* [[ADDR_STRUCT]], i32 0, i32 0
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// CHECK: [[RES:%.*]] = load i64, i64* [[ADDR_I64]]
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// CHECK: ret i64 [[RES]]
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return va_arg(*mylist, OneLongLong).a;
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}
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typedef struct {
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float arr[4];
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} HFA;
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// HFAs take priority over passing large structs indirectly.
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float test_hfa(va_list *mylist) {
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// CHECK-LABEL: define{{.*}} float @test_hfa
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// CHECK: [[START:%.*]] = load i8*, i8** %mylist
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// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[START]], i32 16
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// CHECK: store i8* [[NEXT]], i8** %mylist
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// CHECK: [[ADDR_FLOAT:%.*]] = bitcast i8* [[START]] to float*
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// CHECK: [[RES:%.*]] = load float, float* [[ADDR_FLOAT]]
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// CHECK: ret float [[RES]]
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return va_arg(*mylist, HFA).arr[0];
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}
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// armv7k does not return HFAs normally for variadic functions, so we must match
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// that.
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HFA test_hfa_return(int n, ...) {
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// CHECK-LABEL: define{{.*}} [2 x i64] @test_hfa_return
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HFA h = {0};
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return h;
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}
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typedef struct {
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long long a, b;
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char c;
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} BigStruct;
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// Structs bigger than 16 bytes are passed indirectly: a pointer is placed on
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// the stack.
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long long test_bigstruct(BigStruct input, va_list *mylist) {
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// CHECK-LABEL: define{{.*}} i64 @test_bigstruct(%struct.BigStruct*
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// CHECK: [[START:%.*]] = load i8*, i8** %mylist
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// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[START]], i32 4
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// CHECK: store i8* [[NEXT]], i8** %mylist
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// CHECK: [[INT_PTR:%.*]] = bitcast i8* [[START]] to %struct.BigStruct**
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// CHECK: [[ADDR:%.*]] = load %struct.BigStruct*, %struct.BigStruct** [[INT_PTR]]
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// CHECK: [[ADDR_I64:%.*]] = getelementptr inbounds %struct.BigStruct, %struct.BigStruct* [[ADDR]], i32 0, i32 0
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// CHECK: [[RES:%.*]] = load i64, i64* [[ADDR_I64]]
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// CHECK: ret i64 [[RES]]
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return va_arg(*mylist, BigStruct).a;
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}
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typedef struct {
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short arr[3];
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} ThreeShorts;
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// Slot sizes are 4-bytes on arm64_32, so structs with less than 32-bit
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// alignment must be passed via "[N x i32]" to be correctly allocated in the
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// backend.
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short test_threeshorts(ThreeShorts input, va_list *mylist) {
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// CHECK-LABEL: define{{.*}} signext i16 @test_threeshorts([2 x i32] %input
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// CHECK: [[START:%.*]] = load i8*, i8** %mylist
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// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[START]], i32 8
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// CHECK: store i8* [[NEXT]], i8** %mylist
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// CHECK: [[ADDR_I32:%.*]] = bitcast i8* [[START]] to i16*
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// CHECK: [[RES:%.*]] = load i16, i16* [[ADDR_I32]]
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// CHECK: ret i16 [[RES]]
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return va_arg(*mylist, ThreeShorts).arr[0];
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}
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