Subzero, MIPS32: Implement logical instructions ashr, lshr, shl

src/IceTargetLoweringMIPS32.cpp

Index: src/IceTargetLoweringMIPS32.cpp
diff --git a/src/IceTargetLoweringMIPS32.cpp b/src/IceTargetLoweringMIPS32.cpp
index 79f02fbaefac2a5b395a0f1f37f3cd834e881a2b..a2e82b266535a2149254aac634e52fbb1d6ef343 100644
--- a/src/IceTargetLoweringMIPS32.cpp
+++ b/src/IceTargetLoweringMIPS32.cpp
@@ -692,9 +692,6 @@ void TargetMIPS32::lowerArithmetic(const InstArithmetic *Instr) {
   switch (Instr->getOp()) {
   default:
     break;
-  case InstArithmetic::Shl:
-  case InstArithmetic::Lshr:
-  case InstArithmetic::Ashr:
   case InstArithmetic::Udiv:
   case InstArithmetic::Sdiv:
   case InstArithmetic::Urem:
@@ -742,12 +739,21 @@ void TargetMIPS32::lowerArithmetic(const InstArithmetic *Instr) {
     _mov(Dest, T);
     return;
   }
-  case InstArithmetic::Shl:
-    break;
-  case InstArithmetic::Lshr:
-    break;
-  case InstArithmetic::Ashr:
-    break;
+  case InstArithmetic::Shl: {
+    _sllv(T, Src0R, Src1R);
+    _mov(Dest, T);
+    return;
+  }
+  case InstArithmetic::Lshr: {
+    _srlv(T, Src0R, Src1R);
+    _mov(Dest, T);
+    return;
+  }
+  case InstArithmetic::Ashr: {
+    _srav(T, Src0R, Src1R);
+    _mov(Dest, T);
+    return;
+  }
   case InstArithmetic::Udiv:
     break;
   case InstArithmetic::Sdiv: