PPC: Fix simulator and re-enable wasm tests.

R=bradnelson@chromium.org, titzer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1567753002

Cr-Commit-Position: refs/heads/master@{#33140}

src/ppc/simulator-ppc.cc

@@ -3861,6 +3861,9 @@ void Simulator::CallInternal(byte* entry) {
   set_pc(reinterpret_cast<intptr_t>(entry));
 #endif
 
+  // Put target address in ip (for JS prologue).
+  set_register(r12, get_pc());
+
   // Put down marker for end of simulation. The simulator will stop simulation
   // when the PC reaches this value. By saving the "end simulation" value into
   // the LR the simulation stops when returning to this call point.

test/cctest/wasm/test-run-wasm-module.cc

@@ -28,9 +28,6 @@ void TestModule(WasmModuleIndex* module, int32_t expected_result) {
 }  // namespace
 
 
-// TODO(tizer): Figure out why this crashes with PPC.
-#if !defined(V8_TARGET_ARCH_PPC) && !defined(V8_TARGET_ARCH_PPC64)
-
 // A raw test that skips the WasmModuleBuilder.
 TEST(Run_WasmModule_CallAdd_rev) {
   static const byte data[] = {
@@ -58,8 +55,6 @@ TEST(Run_WasmModule_CallAdd_rev) {
   CHECK_EQ(99, result);
 }
 
-#endif
-
 
 TEST(Run_WasmModule_Return114) {
   static const int32_t kReturnValue = 114;
@@ -76,9 +71,6 @@ TEST(Run_WasmModule_Return114) {
 }
 
 
-// TODO(tizer): Figure out why this crashes with PPC.
-#if !defined(V8_TARGET_ARCH_PPC) && !defined(V8_TARGET_ARCH_PPC64)
-
 TEST(Run_WasmModule_CallAdd) {
   Zone zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
@@ -100,8 +92,6 @@ TEST(Run_WasmModule_CallAdd) {
   TestModule(writer->WriteTo(&zone), 99);
 }
 
-#endif
-
 
 TEST(Run_WasmModule_ReadLoadedDataSegment) {
   static const byte kDataSegmentDest0 = 12;
@@ -156,9 +146,7 @@ TEST(Run_WasmModule_CheckMemoryIsZero) {
 #endif
 
 
-#if !defined(V8_WITH_ASAN) && !defined(V8_TARGET_ARCH_PPC) && \
-    !defined(V8_TARGET_ARCH_PPC64)
-// TODO(tizer): Figure out why this crashes with PPC.
+#if !defined(V8_WITH_ASAN)
 // TODO(bradnelson): Figure out why this crashes under asan.
 TEST(Run_WasmModule_CallMain_recursive) {
   Zone zone;
@@ -184,9 +172,7 @@ TEST(Run_WasmModule_CallMain_recursive) {
 #endif
 
 
-#if !defined(V8_WITH_ASAN) && !defined(V8_TARGET_ARCH_PPC) && \
-    !defined(V8_TARGET_ARCH_PPC64)
-// TODO(tizer): Figure out why this fails with PPC.
+#if !defined(V8_WITH_ASAN)
 // TODO(bradnelson): Figure out why this crashes under asan.
 TEST(Run_WasmModule_Global) {
   Zone zone;