Subzero, MIPS32: Stacksave/Stackrestore implementation

tests_lit/llvm2ice_tests/nacl-other-intrinsics.ll

 ; This tests the NaCl intrinsics not related to atomic operations.
 
 ; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
 ; RUN:   --target x8632 --sandbox -i %s --args -O2 \
 ; RUN:   -allow-externally-defined-symbols \
 ; RUN:   | %if --need=target_X8632 --command FileCheck %s
 ; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
 ; RUN:   --target x8632 --sandbox -i %s --args -Om1 \
 ; RUN:   -allow-externally-defined-symbols \
 ; RUN:   | %if --need=target_X8632 --command FileCheck %s
@@ skipping 640 matching lines @@
   %sp = call i8* @llvm.stacksave()
   call void @llvm.stackrestore(i8* %sp)
   ret void
 }
 ; CHECK-LABEL: test_stacksave_noalloca
 ; CHECK: mov {{.*}},esp
 ; CHECK: mov esp,{{.*}}
 ; ARM32-LABEL: test_stacksave_noalloca
 ; ARM32: mov {{.*}}, sp
 ; ARM32: mov sp, {{.*}}
+; MIPS32-LABEL: test_stacksave_noalloca
+; MIPS32:       sw      sp,{{.*}}
+; MIPS32:       lw      [[REG:.*]],0(sp)
+; MIPS32:       move    sp,[[REG]]
 
 declare i32 @foo(i32 %x)
 
 define internal void @test_stacksave_multiple(i32 %x) {
 entry:
   %x_4 = mul i32 %x, 4
   %sp1 = call i8* @llvm.stacksave()
   %tmp1 = alloca i8, i32 %x_4, align 4
 
   %sp2 = call i8* @llvm.stacksave()
@@ skipping 24 matching lines @@
 ; CHECK: lea {{.*}},[esp+0x10]
 ; CHECK: lea {{.*}},[esp+0x10]
 ; CHECK: call
 ; CHECK: mov esp,{{.*}}
 ; CHECK: mov esp,ebp
 ; ARM32-LABEL: test_stacksave_multiple
 ; ARM32: mov {{.*}}, sp
 ; ARM32: mov {{.*}}, sp
 ; ARM32: mov {{.*}}, sp
 ; ARM32: mov sp, {{.*}}
+; MIPS32-LABEL: test_stacksave_multiple
+; MIPS32:       sw      sp,[[MEMLOC:.*]]
+; MIPS32:       sw      sp,{{.*}}
+; MIPS32:       sw      sp,{{.*}}
+; MIPS32:       lw      [[REG:.*]],[[MEMLOC]]
+; MIPS32:       move    sp,[[REG]]