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// RUN: %clang_cc1 -triple sparcv9-unknown-unknown -emit-llvm %s -o - | FileCheck %s
#include <stdarg.h>
// CHECK-LABEL: define void @f_void()
void f_void(void) {}
// Arguments and return values smaller than the word size are extended.
// CHECK-LABEL: define signext i32 @f_int_1(i32 signext %x)
int f_int_1(int x) { return x; }
// CHECK-LABEL: define zeroext i32 @f_int_2(i32 zeroext %x)
unsigned f_int_2(unsigned x) { return x; }
// CHECK-LABEL: define i64 @f_int_3(i64 %x)
long long f_int_3(long long x) { return x; }
// CHECK-LABEL: define signext i8 @f_int_4(i8 signext %x)
char f_int_4(char x) { return x; }
// CHECK-LABEL: define fp128 @f_ld(fp128 %x)
long double f_ld(long double x) { return x; }
// Small structs are passed in registers.
struct small {
int *a, *b;
};
// CHECK-LABEL: define %struct.small @f_small(i32* %x.coerce0, i32* %x.coerce1)
struct small f_small(struct small x) {
x.a += *x.b;
x.b = 0;
return x;
}
// Medium-sized structs are passed indirectly, but can be returned in registers.
struct medium {
int *a, *b;
int *c, *d;
};
// CHECK-LABEL: define %struct.medium @f_medium(%struct.medium* %x)
struct medium f_medium(struct medium x) {
x.a += *x.b;
x.b = 0;
return x;
}
// Large structs are also returned indirectly.
struct large {
int *a, *b;
int *c, *d;
int x;
};
// CHECK-LABEL: define void @f_large(%struct.large* noalias sret %agg.result, %struct.large* %x)
struct large f_large(struct large x) {
x.a += *x.b;
x.b = 0;
return x;
}
// A 64-bit struct fits in a register.
struct reg {
int a, b;
};
// CHECK-LABEL: define i64 @f_reg(i64 %x.coerce)
struct reg f_reg(struct reg x) {
x.a += x.b;
return x;
}
// Structs with mixed int and float parts require the inreg attribute.
struct mixed {
int a;
float b;
};
// CHECK-LABEL: define inreg %struct.mixed @f_mixed(i32 inreg %x.coerce0, float inreg %x.coerce1)
struct mixed f_mixed(struct mixed x) {
x.a += 1;
return x;
}
// Struct with padding.
struct mixed2 {
int a;
double b;
};
// CHECK: define { i64, double } @f_mixed2(i64 %x.coerce0, double %x.coerce1)
// CHECK: store i64 %x.coerce0
// CHECK: store double %x.coerce1
struct mixed2 f_mixed2(struct mixed2 x) {
x.a += 1;
return x;
}
// Struct with single element and padding in passed in the high bits of a
// register.
struct tiny {
char a;
};
// CHECK-LABEL: define i64 @f_tiny(i64 %x.coerce)
// CHECK: %[[HB:[^ ]+]] = lshr i64 %x.coerce, 56
// CHECK: = trunc i64 %[[HB]] to i8
struct tiny f_tiny(struct tiny x) {
x.a += 1;
return x;
}
// CHECK-LABEL: define void @call_tiny()
// CHECK: %[[XV:[^ ]+]] = zext i8 %{{[^ ]+}} to i64
// CHECK: %[[HB:[^ ]+]] = shl i64 %[[XV]], 56
// CHECK: = call i64 @f_tiny(i64 %[[HB]])
void call_tiny() {
struct tiny x = { 1 };
f_tiny(x);
}
// CHECK-LABEL: define signext i32 @f_variable(i8* %f, ...)
// CHECK: %ap = alloca i8*
// CHECK: call void @llvm.va_start
//
int f_variable(char *f, ...) {
int s = 0;
char c;
va_list ap;
va_start(ap, f);
while ((c = *f++)) switch (c) {
// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
// CHECK-DAG: %[[NXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 8
// CHECK-DAG: store i8* %[[NXT]], i8** %ap
// CHECK-DAG: %[[EXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 4
// CHECK-DAG: %[[ADR:[^ ]+]] = bitcast i8* %[[EXT]] to i32*
// CHECK-DAG: load i32, i32* %[[ADR]]
// CHECK: br
case 'i':
s += va_arg(ap, int);
break;
// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
// CHECK-DAG: %[[NXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 8
// CHECK-DAG: store i8* %[[NXT]], i8** %ap
// CHECK-DAG: %[[ADR:[^ ]+]] = bitcast i8* %[[CUR]] to i64*
// CHECK-DAG: load i64, i64* %[[ADR]]
// CHECK: br
case 'l':
s += va_arg(ap, long);
break;
// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
// CHECK-DAG: %[[NXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 8
// CHECK-DAG: store i8* %[[NXT]], i8** %ap
// CHECK-DAG: %[[ADR:[^ ]+]] = bitcast i8* %[[CUR]] to %struct.tiny*
// CHECK: br
case 't':
s += va_arg(ap, struct tiny).a;
break;
// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
// CHECK-DAG: %[[NXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 16
// CHECK-DAG: store i8* %[[NXT]], i8** %ap
// CHECK-DAG: %[[ADR:[^ ]+]] = bitcast i8* %[[CUR]] to %struct.small*
// CHECK: br
case 's':
s += *va_arg(ap, struct small).a;
break;
// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
// CHECK-DAG: %[[NXT:[^ ]+]] = getelementptr i8, i8* %[[CUR]], i32 8
// CHECK-DAG: store i8* %[[NXT]], i8** %ap
// CHECK-DAG: %[[IND:[^ ]+]] = bitcast i8* %[[CUR]] to %struct.medium**
// CHECK-DAG: %[[ADR:[^ ]+]] = load %struct.medium*, %struct.medium** %[[IND]]
// CHECK: br
case 'm':
s += *va_arg(ap, struct medium).a;
break;
}
return s;
}
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