PPC/s390: [wasm] Trim graph before scheduling.

src/compiler/ppc/code-generator-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1223 matching lines @@
       // i.InputRegister(1) ... left high word.
       // i.InputRegister(2) ... right low word.
       // i.InputRegister(3) ... right high word.
       __ mullw(i.TempRegister(0), i.InputRegister(0), i.InputRegister(3));
       __ mullw(i.TempRegister(1), i.InputRegister(2), i.InputRegister(1));
       __ add(i.TempRegister(0), i.TempRegister(0), i.TempRegister(1));
       __ mullw(i.OutputRegister(0), i.InputRegister(0), i.InputRegister(2));
       __ mulhwu(i.OutputRegister(1), i.InputRegister(0), i.InputRegister(2));
       __ add(i.OutputRegister(1), i.OutputRegister(1), i.TempRegister(0));
       break;
-    case kPPC_ShiftLeftPair:
+    case kPPC_ShiftLeftPair: {
+      Register second_output =
+          instr->OutputCount() >= 2 ? i.OutputRegister(1) : i.TempRegister(0);
       if (instr->InputAt(2)->IsImmediate()) {
-        __ ShiftLeftPair(i.OutputRegister(0), i.OutputRegister(1),
-                         i.InputRegister(0), i.InputRegister(1),
-                         i.InputInt32(2));
+        __ ShiftLeftPair(i.OutputRegister(0), second_output, i.InputRegister(0),
+                         i.InputRegister(1), i.InputInt32(2));
       } else {
-        __ ShiftLeftPair(i.OutputRegister(0), i.OutputRegister(1),
-                         i.InputRegister(0), i.InputRegister(1), kScratchReg,
-                         i.InputRegister(2));
+        __ ShiftLeftPair(i.OutputRegister(0), second_output, i.InputRegister(0),
+                         i.InputRegister(1), kScratchReg, i.InputRegister(2));
       }
       break;
-    case kPPC_ShiftRightPair:
+    }
+    case kPPC_ShiftRightPair: {
+      Register second_output =
+          instr->OutputCount() >= 2 ? i.OutputRegister(1) : i.TempRegister(0);
       if (instr->InputAt(2)->IsImmediate()) {
-        __ ShiftRightPair(i.OutputRegister(0), i.OutputRegister(1),
+        __ ShiftRightPair(i.OutputRegister(0), second_output,
                           i.InputRegister(0), i.InputRegister(1),
                           i.InputInt32(2));
       } else {
-        __ ShiftRightPair(i.OutputRegister(0), i.OutputRegister(1),
+        __ ShiftRightPair(i.OutputRegister(0), second_output,
                           i.InputRegister(0), i.InputRegister(1), kScratchReg,
                           i.InputRegister(2));
       }
       break;
-    case kPPC_ShiftRightAlgPair:
+    }
+    case kPPC_ShiftRightAlgPair: {
+      Register second_output =
+          instr->OutputCount() >= 2 ? i.OutputRegister(1) : i.TempRegister(0);
       if (instr->InputAt(2)->IsImmediate()) {
-        __ ShiftRightAlgPair(i.OutputRegister(0), i.OutputRegister(1),
+        __ ShiftRightAlgPair(i.OutputRegister(0), second_output,
                              i.InputRegister(0), i.InputRegister(1),
                              i.InputInt32(2));
       } else {
-        __ ShiftRightAlgPair(i.OutputRegister(0), i.OutputRegister(1),
+        __ ShiftRightAlgPair(i.OutputRegister(0), second_output,
                              i.InputRegister(0), i.InputRegister(1),
                              kScratchReg, i.InputRegister(2));
       }
       break;
+    }
 #endif
     case kPPC_RotRight32:
       if (HasRegisterInput(instr, 1)) {
         __ subfic(kScratchReg, i.InputRegister(1), Operand(32));
         __ rotlw(i.OutputRegister(), i.InputRegister(0), kScratchReg,
                  i.OutputRCBit());
       } else {
         int sh = i.InputInt32(1);
         __ rotrwi(i.OutputRegister(), i.InputRegister(0), sh, i.OutputRCBit());
       }
@@ skipping 1150 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8