Files
clang-p2996/clang/test/CodeGen/mips64-class-return.cpp
Daniel Sanders e5018b6c00 [mips] Mark aggregates returned in registers with the 'inreg' attribute.
Summary:
This allows us to easily find them in the backend after the aggregates have
been lowered to other types. This is important on big-endian targets using
the N32/N64 ABI's since these ABI's must shift small structures into the
upper bits of the register.

Reviewers: atanasyan

Reviewed By: atanasyan

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5005

llvm-svn: 217160
2014-09-04 15:05:39 +00:00

47 lines
700 B
C++

// RUN: %clang -target mips64el-unknown-linux -O3 -S -mabi=n64 -o - -emit-llvm %s | FileCheck %s
class B0 {
double d;
};
class D0 : public B0 {
float f;
};
class B1 {
};
class D1 : public B1 {
double d;
float f;
};
class D2 : public B0 {
double d2;
};
extern D0 gd0;
extern D1 gd1;
extern D2 gd2;
// CHECK: define inreg { i64, i64 } @_Z4foo1v()
D0 foo1(void) {
return gd0;
}
// CHECK: define inreg { double, float } @_Z4foo2v()
D1 foo2(void) {
return gd1;
}
// CHECK-LABEL: define void @_Z4foo32D2(i64 %a0.coerce0, double %a0.coerce1)
void foo3(D2 a0) {
gd2 = a0;
}
// CHECK-LABEL: define void @_Z4foo42D0(i64 %a0.coerce0, i64 %a0.coerce1)
void foo4(D0 a0) {
gd0 = a0;
}