diff options
Diffstat (limited to 'test/CodeGen/Mips/cconv/reserved-space.ll')
-rw-r--r-- | test/CodeGen/Mips/cconv/reserved-space.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/cconv/reserved-space.ll b/test/CodeGen/Mips/cconv/reserved-space.ll new file mode 100644 index 0000000..b36f89e --- /dev/null +++ b/test/CodeGen/Mips/cconv/reserved-space.ll @@ -0,0 +1,39 @@ +; RUN: llc -march=mips < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s +; RUN: llc -march=mipsel < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s + +; RUN-TODO: llc -march=mips64 -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s +; RUN-TODO: llc -march=mips64el -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s + +; RUN: llc -march=mips64 -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s +; RUN: llc -march=mips64el -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s + +; RUN: llc -march=mips64 -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s +; RUN: llc -march=mips64el -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s + +; Test that O32 correctly reserved space for the four arguments, even when +; there aren't any as per section 5 of MD00305 (MIPS ABIs Described). + +declare void @foo() nounwind; + +define void @reserved_space() nounwind { +entry: + tail call void @foo() + ret void +} + +; ALL-LABEL: reserved_space: +; O32: addiu $sp, $sp, -24 +; O32: sw $ra, 20($sp) +; O32: lw $ra, 20($sp) +; O32: addiu $sp, $sp, 24 +; Despite pointers being 32-bit wide on N32, the return pointer is saved as a +; 64-bit pointer. I've yet to find a documentation reference for this quirk but +; this behaviour matches GCC so I have considered it to be correct. +; N32: addiu $sp, $sp, -16 +; N32: sd $ra, 8($sp) +; N32: ld $ra, 8($sp) +; N32: addiu $sp, $sp, 16 +; N64: daddiu $sp, $sp, -16 +; N64: sd $ra, 8($sp) +; N64: ld $ra, 8($sp) +; N64: daddiu $sp, $sp, 16 |