skip _ec ld insn when data size is lesser or equal to 32.

Author: cdevadas

llvm/lib/Target/AMDGPU/SMInstructions.td

@@ -171,15 +171,15 @@ multiclass SM_Pseudo_Loads<RegisterClass baseClass,
   // The constrained multi-dword load equivalents with early clobber flag at
   // the dst operand. They are needed only for codegen and there is no need for
   // their real opcodes.
-  let SubtargetPredicate = isGFX8Plus,
-      Constraints = !if(!gt(dstClass.RegTypes[0].Size, 32),
-                         "@earlyclobber $sdst", "") in {
-    let PseudoInstr = NAME # !cast<OffsetMode>(IMM_Offset).Variant in
-      def _IMM_ec : SM_Load_Pseudo <opName, baseClass, dstClass, IMM_Offset>;
-    let PseudoInstr = NAME # !cast<OffsetMode>(SGPR_Offset).Variant in
-      def _SGPR_ec : SM_Load_Pseudo <opName, baseClass, dstClass, SGPR_Offset>;
-    let PseudoInstr = NAME # !cast<OffsetMode>(SGPR_IMM_Offset).Variant in
-      def _SGPR_IMM_ec : SM_Load_Pseudo <opName, baseClass, dstClass, SGPR_IMM_Offset>;
+  if !gt(dstClass.RegTypes[0].Size, 32) then {
+    let SubtargetPredicate = isGFX8Plus, Constraints = "@earlyclobber $sdst" in {
+      let PseudoInstr = NAME # !cast<OffsetMode>(IMM_Offset).Variant in
+        def _IMM_ec : SM_Load_Pseudo <opName, baseClass, dstClass, IMM_Offset>;
+      let PseudoInstr = NAME # !cast<OffsetMode>(SGPR_Offset).Variant in
+        def _SGPR_ec : SM_Load_Pseudo <opName, baseClass, dstClass, SGPR_Offset>;
+      let PseudoInstr = NAME # !cast<OffsetMode>(SGPR_IMM_Offset).Variant in
+        def _SGPR_IMM_ec : SM_Load_Pseudo <opName, baseClass, dstClass, SGPR_IMM_Offset>;
+    }
   }
 }