1 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/cconv/return-hard-struct-f128.ll b/test/CodeGen/Mips/cconv/return-hard-struct-f128.ll
new file mode 100644
index 0000000..2e84477
--- /dev/null
+++ b/test/CodeGen/Mips/cconv/return-hard-struct-f128.ll
@@ -0,0 +1,36 @@
+; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
+; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
+
+; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
+; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
+
+; Test return of {fp128} agrees with de-facto N32/N64 ABI.
+
+@struct_fp128 = global {fp128} zeroinitializer
+
+define inreg {fp128} @ret_struct_fp128() nounwind {
+entry:
+        %0 = load volatile {fp128}* @struct_fp128
+        ret {fp128} %0
+}
+
+; ALL-LABEL: ret_struct_fp128:
+
+; O32 generates different IR so we don't test it here. It returns the struct
+; indirectly.
+
+; Contrary to the N32/N64 ABI documentation, a struct containing a long double
+; is returned in $f0, and $f1 instead of the usual $f0, and $f2. This is to
+; match the de facto ABI as implemented by GCC.
+; N32-DAG:        lui [[R1:\$[0-9]+]], %hi(struct_fp128)
+; N32-DAG:        ld  [[R2:\$[0-9]+]], %lo(struct_fp128)([[R1]])
+; N32-DAG:        dmtc1 [[R2]], $f0
+; N32-DAG:        addiu [[R3:\$[0-9]+]], [[R1]], %lo(struct_fp128)
+; N32-DAG:        ld  [[R4:\$[0-9]+]], 8([[R3]])
+; N32-DAG:        dmtc1 [[R4]], $f1
+
+; N64-DAG:        ld  [[R1:\$[0-9]+]], %got_disp(struct_fp128)($1)
+; N64-DAG:        ld  [[R2:\$[0-9]+]], 0([[R1]])
+; N64-DAG:        dmtc1 [[R2]], $f0
+; N64-DAG:        ld  [[R4:\$[0-9]+]], 8([[R1]])
+; N64-DAG:        dmtc1 [[R4]], $f1