PPC/s390: [Liftoff] Remove unused return value

Port 9c3e94b2

R=clemensb@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I61d15d3314752408505cf91e4db454318efa2047
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893587Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64702}

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -213,9 +213,8 @@ void LiftoffAssembler::FillStackSlotsWithZero(uint32_t index, uint32_t count) {
     bailout(kUnsupportedArchitecture, "i64_i binop: " #name);                  \
   }
 #define UNIMPLEMENTED_GP_UNOP(name)                                \
-  bool LiftoffAssembler::emit_##name(Register dst, Register src) { \
+  void LiftoffAssembler::emit_##name(Register dst, Register src) { \
     bailout(kUnsupportedArchitecture, "gp unop: " #name);          \
-    return true;                                                   \
   }
 #define UNIMPLEMENTED_FP_BINOP(name)                                         \
   void LiftoffAssembler::emit_##name(DoubleRegister dst, DoubleRegister lhs, \
@@ -264,7 +263,6 @@ UNIMPLEMENTED_I64_SHIFTOP(i64_sar)
 UNIMPLEMENTED_I64_SHIFTOP(i64_shr)
 UNIMPLEMENTED_GP_UNOP(i32_clz)
 UNIMPLEMENTED_GP_UNOP(i32_ctz)
-UNIMPLEMENTED_GP_UNOP(i32_popcnt)
 UNIMPLEMENTED_FP_BINOP(f32_add)
 UNIMPLEMENTED_FP_BINOP(f32_sub)
 UNIMPLEMENTED_FP_BINOP(f32_mul)
@@ -305,6 +303,11 @@ UNIMPLEMENTED_FP_UNOP(f64_sqrt)
 #undef UNIMPLEMENTED_I32_SHIFTOP
 #undef UNIMPLEMENTED_I64_SHIFTOP
 
+bool LiftoffAssembler::emit_i32_popcnt(Register dst, Register src) {
+  bailout(kUnsupportedArchitecture, "i32_popcnt");
+  return true;
+}
+
 void LiftoffAssembler::emit_i32_divs(Register dst, Register lhs, Register rhs,
                                      Label* trap_div_by_zero,
                                      Label* trap_div_unrepresentable) {

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -212,9 +212,8 @@ void LiftoffAssembler::FillStackSlotsWithZero(uint32_t index, uint32_t count) {
     bailout(kUnsupportedArchitecture, "i64 binop_i: " #name);                  \
   }
 #define UNIMPLEMENTED_GP_UNOP(name)                                \
-  bool LiftoffAssembler::emit_##name(Register dst, Register src) { \
+  void LiftoffAssembler::emit_##name(Register dst, Register src) { \
     bailout(kUnsupportedArchitecture, "gp unop: " #name);          \
-    return true;                                                   \
   }
 #define UNIMPLEMENTED_FP_BINOP(name)                                         \
   void LiftoffAssembler::emit_##name(DoubleRegister dst, DoubleRegister lhs, \
@@ -263,7 +262,6 @@ UNIMPLEMENTED_I64_SHIFTOP(i64_sar)
 UNIMPLEMENTED_I64_SHIFTOP(i64_shr)
 UNIMPLEMENTED_GP_UNOP(i32_clz)
 UNIMPLEMENTED_GP_UNOP(i32_ctz)
-UNIMPLEMENTED_GP_UNOP(i32_popcnt)
 UNIMPLEMENTED_FP_BINOP(f32_add)
 UNIMPLEMENTED_FP_BINOP(f32_sub)
 UNIMPLEMENTED_FP_BINOP(f32_mul)
@@ -304,6 +302,11 @@ UNIMPLEMENTED_FP_UNOP(f64_sqrt)
 #undef UNIMPLEMENTED_I32_SHIFTOP
 #undef UNIMPLEMENTED_I64_SHIFTOP
 
+bool LiftoffAssembler::emit_i32_popcnt(Register dst, Register src) {
+  bailout(kUnsupportedArchitecture, "i32_popcnt");
+  return true;
+}
+
 void LiftoffAssembler::emit_i32_divs(Register dst, Register lhs, Register rhs,
                                      Label* trap_div_by_zero,
                                      Label* trap_div_unrepresentable) {