Subzero, MIPS32: Enable MIPS support in lit tests

tests_lit/llvm2ice_tests/square.ll

 ; Test the a=b*b lowering sequence which can use a single temporary register
 ; instead of two registers.
 
 ; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
 ; RUN:   --target x8632 -i %s --args -O2 -mattr=sse4.1 \
 ; RUN:   | %if --need=target_X8632 --command FileCheck %s
 
 ; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
 ; RUN:   --target x8632 -i %s --args -Om1 -mattr=sse4.1 \
 ; RUN:   | %if --need=target_X8632 --command FileCheck %s
 
+; RUN: %if --need=target_MIPS32 --need=allow_dump \
+; RUN:   --command %p2i --filetype=asm --assemble --disassemble --target \
+; RUN:   mips32 -i %s --args -O2 -allow-externally-defined-symbols \
+; RUN:   | %if --need=target_MIPS32 --need=allow_dump \
+; RUN:   --command FileCheck --check-prefix MIPS32 %s
+
 define internal float @Square_float(float %a) {
 entry:
   %result = fmul float %a, %a
   ret float %result
 }
 ; CHECK-LABEL: Square_float
 ; CHECK: mulss [[REG:xmm.]],[[REG]]
+; MIPS32-LABEL: Square_float
+; MIPS32:       mov.s
+; MIPS32:       mul.s
 
 define internal double @Square_double(double %a) {
 entry:
   %result = fmul double %a, %a
   ret double %result
 }
 ; CHECK-LABEL: Square_double
 ; CHECK: mulsd [[REG:xmm.]],[[REG]]
+; MIPS32-LABEL: Square_double
+; MIPS32:       mov.d
+; MIPS32:       mul.d
 
 define internal i32 @Square_i32(i32 %a) {
 entry:
   %result = mul i32 %a, %a
   ret i32 %result
 }
 ; CHECK-LABEL: Square_i32
 ; CHECK: imul [[REG:e..]],[[REG]]
+; MIPS32-LABEL: Square_i32
+; MIPS32:       move
+; MIPS32:       mul
 
 define internal i32 @Square_i16(i32 %a) {
 entry:
   %a.16 = trunc i32 %a to i16
   %result = mul i16 %a.16, %a.16
   %result.i32 = sext i16 %result to i32
   ret i32 %result.i32
 }
 ; CHECK-LABEL: Square_i16
 ; CHECK: imul [[REG:..]],[[REG]]
+; MIPS32-LABEL: Square_i16
+; MIPS32:       move
+; MIPS32:       mul
+; MIPS32:       sll
+; MIPS32:       sra
 
 define internal i32 @Square_i8(i32 %a) {
 entry:
   %a.8 = trunc i32 %a to i8
   %result = mul i8 %a.8, %a.8
   %result.i32 = sext i8 %result to i32
   ret i32 %result.i32
 }
 ; CHECK-LABEL: Square_i8
 ; CHECK: imul al
+; MIPS32-LABEL: Square_i8
+; MIPS32:       move
+; MIPS32:       mul
+; MIPS32:       sll
+; MIPS32:       sra
 
 define internal <4 x float> @Square_v4f32(<4 x float> %a) {
 entry:
   %result = fmul <4 x float> %a, %a
   ret <4 x float> %result
 }
 ; CHECK-LABEL: Square_v4f32
 ; CHECK: mulps [[REG:xmm.]],[[REG]]
 
 define internal <4 x i32> @Square_v4i32(<4 x i32> %a) {
@@ skipping 12 matching lines @@
 ; CHECK-LABEL: Square_v8i16
 ; CHECK: pmullw [[REG:xmm.]],[[REG]]
 
 define internal <16 x i8> @Square_v16i8(<16 x i8> %a) {
 entry:
   %result = mul <16 x i8> %a, %a
   ret <16 x i8> %result
 }
 ; CHECK-LABEL: Square_v16i8
 ; CHECK-NOT: pmul