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| author | dim <dim@FreeBSD.org> | 2015-01-18 16:23:48 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2015-01-18 16:23:48 +0000 |
| commit | c86b984ea8ecb3e944dc3de48539f4c1f65851ea (patch) | |
| tree | 3eb853da77d46cc77c4b017525a422f9ddb1385b /test/CodeGen/mips-transparent-union.c | |
| parent | c696171ff15f0ee60dea4abfd99a135473c95656 (diff) | |
| download | FreeBSD-src-c86b984ea8ecb3e944dc3de48539f4c1f65851ea.zip FreeBSD-src-c86b984ea8ecb3e944dc3de48539f4c1f65851ea.tar.gz | |
Vendor import of clang RELEASE_360/rc1 tag r226102 (effectively, 3.6.0 RC1):
https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_360/rc1@226102
Diffstat (limited to 'test/CodeGen/mips-transparent-union.c')
| -rw-r--r-- | test/CodeGen/mips-transparent-union.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/CodeGen/mips-transparent-union.c b/test/CodeGen/mips-transparent-union.c new file mode 100644 index 0000000..ad417dd --- /dev/null +++ b/test/CodeGen/mips-transparent-union.c @@ -0,0 +1,27 @@ +// RUN: %clang_cc1 -triple mips64-linux-gnu -S -o - -emit-llvm %s | FileCheck %s +// +// Transparent unions are passed according to the calling convention rules of +// the first member. In this case, it is as if it were a void pointer so we +// do not have the inreg attribute we would normally have for unions. +// +// This comes up in glibc's wait() function and matters for the big-endian N32 +// case where pointers are promoted to i64 and a non-transparent union would be +// passed in the upper 32-bits of an i64. + +union either_pointer { + void *void_ptr; + int *int_ptr; +} __attribute__((transparent_union)); + +extern void foo(union either_pointer p); + +int data; + +void bar(void) { + return foo(&data); +} + +// CHECK-LABEL: define void @bar() +// CHECK: call void @foo(i8* %{{[0-9]+}}) + +// CHECK: declare void @foo(i8*) |
