1 files changed, 66 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/cconv/return.ll b/test/CodeGen/Mips/cconv/return.ll
new file mode 100644
index 0000000..76ce5e4
--- /dev/null
+++ b/test/CodeGen/Mips/cconv/return.ll
@@ -0,0 +1,66 @@
+; RUN: llc -mtriple=mips-linux-gnu -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
+; RUN: llc -mtriple=mipsel-linux-gnu -relocation-model=static < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
+
+; RUN-TODO: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
+; RUN-TODO: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
+
+; 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 the integer returns for all ABI's and byte orders as specified by
+; section 5 of MD00305 (MIPS ABIs Described).
+
+; We only test Linux because other OS's use different relocations and I don't
+; know if this is correct.
+
+@byte = global i8 zeroinitializer
+@word = global i32 zeroinitializer
+@dword = global i64 zeroinitializer
+@float = global float zeroinitializer
+@double = global double zeroinitializer
+
+define i8 @reti8() nounwind {
+entry:
+        %0 = load volatile i8* @byte
+        ret i8 %0
+}
+
+; ALL-LABEL: reti8:
+; O32-DAG:           lui [[R1:\$[0-9]+]], %hi(byte)
+; O32-DAG:           lbu $2, %lo(byte)([[R1]])
+; N32-DAG:           lui [[R1:\$[0-9]+]], %hi(byte)
+; N32-DAG:           lbu $2, %lo(byte)([[R1]])
+; N64-DAG:           ld  [[R1:\$[0-9]+]], %got_disp(byte)($1)
+; N64-DAG:           lbu $2, 0([[R1]])
+
+define i32 @reti32() nounwind {
+entry:
+        %0 = load volatile i32* @word
+        ret i32 %0
+}
+
+; ALL-LABEL: reti32:
+; O32-DAG:           lui [[R1:\$[0-9]+]], %hi(word)
+; O32-DAG:           lw $2, %lo(word)([[R1]])
+; N32-DAG:           lui [[R1:\$[0-9]+]], %hi(word)
+; N32-DAG:           lw $2, %lo(word)([[R1]])
+; N64-DAG:           ld  [[R1:\$[0-9]+]], %got_disp(word)($1)
+; N64-DAG:           lw $2, 0([[R1]])
+
+define i64 @reti64() nounwind {
+entry:
+        %0 = load volatile i64* @dword
+        ret i64 %0
+}
+
+; ALL-LABEL: reti64:
+; On O32, we must use v0 and v1 for the return value
+; O32-DAG:           lw $2, %lo(dword)([[R1:\$[0-9]+]])
+; O32-DAG:           addiu [[R2:\$[0-9]+]], [[R1]], %lo(dword)
+; O32-DAG:           lw $3, 4([[R2]])
+; N32-DAG:           ld $2, %lo(dword)([[R1:\$[0-9]+]])
+; N64-DAG:           ld  [[R1:\$[0-9]+]], %got_disp(dword)([[R1:\$[0-9]+]])
+; N64-DAG:           ld $2, 0([[R1]])