diff --git a/js/src/jit/arm/MacroAssembler-arm.cpp b/js/src/jit/arm/MacroAssembler-arm.cpp
index 5dd8300e506..f7aa0f47335 100644
--- a/js/src/jit/arm/MacroAssembler-arm.cpp
+++ b/js/src/jit/arm/MacroAssembler-arm.cpp
@@ -2028,7 +2028,7 @@ MacroAssemblerARMCompat::movePtr(const ImmGCPtr &imm, Register dest)
     ma_mov(imm, dest);
 }
 void
-MacroAssemblerARMCompat::movePtr(const ImmPtr &imm, Register dest)
+MacroAssemblerARMCompat::movePtr(ImmPtr imm, Register dest)
 {
     movePtr(ImmWord(uintptr_t(imm.value)), dest);
 }
@@ -2501,7 +2501,7 @@ MacroAssemblerARMCompat::cmpPtr(Register lhs, ImmWord rhs)
 }
 
 void
-MacroAssemblerARMCompat::cmpPtr(Register lhs, const ImmPtr &rhs)
+MacroAssemblerARMCompat::cmpPtr(Register lhs, ImmPtr rhs)
 {
     return cmpPtr(lhs, ImmWord(uintptr_t(rhs.value)));
 }
@@ -2539,7 +2539,7 @@ MacroAssemblerARMCompat::cmpPtr(const Address &lhs, ImmWord rhs)
 }
 
 void
-MacroAssemblerARMCompat::cmpPtr(const Address &lhs, const ImmPtr &rhs)
+MacroAssemblerARMCompat::cmpPtr(const Address &lhs, ImmPtr rhs)
 {
     cmpPtr(lhs, ImmWord(uintptr_t(rhs.value)));
 }
diff --git a/js/src/jit/arm/MacroAssembler-arm.h b/js/src/jit/arm/MacroAssembler-arm.h
index db205287ffc..85f550a3068 100644
--- a/js/src/jit/arm/MacroAssembler-arm.h
+++ b/js/src/jit/arm/MacroAssembler-arm.h
@@ -1235,7 +1235,7 @@ class MacroAssemblerARMCompat : public MacroAssemblerARM
         framePushed_ += sizeof(word.value);
         return pushWithPatch(word);
     }
-    CodeOffsetLabel PushWithPatch(const ImmPtr &imm) {
+    CodeOffsetLabel PushWithPatch(ImmPtr imm) {
         return PushWithPatch(ImmWord(uintptr_t(imm.value)));
     }
 
@@ -1313,7 +1313,7 @@ class MacroAssemblerARMCompat : public MacroAssemblerARM
 
     void movePtr(Register src, Register dest);
     void movePtr(ImmWord imm, Register dest);
-    void movePtr(const ImmPtr &imm, Register dest);
+    void movePtr(ImmPtr imm, Register dest);
     void movePtr(const AsmJSImmPtr &imm, Register dest);
     void movePtr(const ImmGCPtr &imm, Register dest);
 
@@ -1412,13 +1412,13 @@ class MacroAssemblerARMCompat : public MacroAssemblerARM
     void cmp32(const Operand &lhs, Register rhs);
 
     void cmpPtr(Register lhs, ImmWord rhs);
-    void cmpPtr(Register lhs, const ImmPtr &rhs);
+    void cmpPtr(Register lhs, ImmPtr rhs);
     void cmpPtr(Register lhs, Register rhs);
     void cmpPtr(Register lhs, const ImmGCPtr &rhs);
     void cmpPtr(Register lhs, Imm32 rhs);
     void cmpPtr(const Address &lhs, Register rhs);
     void cmpPtr(const Address &lhs, ImmWord rhs);
-    void cmpPtr(const Address &lhs, const ImmPtr &rhs);
+    void cmpPtr(const Address &lhs, ImmPtr rhs);
 
     void subPtr(Imm32 imm, const Register dest);
     void subPtr(const Address &addr, const Register dest);
diff --git a/js/src/jit/mips/MacroAssembler-mips.cpp b/js/src/jit/mips/MacroAssembler-mips.cpp
index d2eb650efb1..917a8eb0b64 100644
--- a/js/src/jit/mips/MacroAssembler-mips.cpp
+++ b/js/src/jit/mips/MacroAssembler-mips.cpp
@@ -1767,7 +1767,7 @@ MacroAssemblerMIPSCompat::movePtr(const ImmGCPtr &imm, Register dest)
     ma_li(dest, imm);
 }
 void
-MacroAssemblerMIPSCompat::movePtr(const ImmPtr &imm, Register dest)
+MacroAssemblerMIPSCompat::movePtr(ImmPtr imm, Register dest)
 {
     movePtr(ImmWord(uintptr_t(imm.value)), dest);
 }
diff --git a/js/src/jit/mips/MacroAssembler-mips.h b/js/src/jit/mips/MacroAssembler-mips.h
index 4ca84485488..c3e4e8a7409 100644
--- a/js/src/jit/mips/MacroAssembler-mips.h
+++ b/js/src/jit/mips/MacroAssembler-mips.h
@@ -935,7 +935,7 @@ public:
         framePushed_ += sizeof(word.value);
         return pushWithPatch(word);
     }
-    CodeOffsetLabel PushWithPatch(const ImmPtr &imm) {
+    CodeOffsetLabel PushWithPatch(ImmPtr imm) {
         return PushWithPatch(ImmWord(uintptr_t(imm.value)));
     }
 
@@ -1025,7 +1025,7 @@ public:
 
     void movePtr(Register src, Register dest);
     void movePtr(ImmWord imm, Register dest);
-    void movePtr(const ImmPtr &imm, Register dest);
+    void movePtr(ImmPtr imm, Register dest);
     void movePtr(const AsmJSImmPtr &imm, Register dest);
     void movePtr(const ImmGCPtr &imm, Register dest);
 
diff --git a/js/src/jit/shared/MacroAssembler-x86-shared.h b/js/src/jit/shared/MacroAssembler-x86-shared.h
index 15d49750a42..72c8d4a9846 100644
--- a/js/src/jit/shared/MacroAssembler-x86-shared.h
+++ b/js/src/jit/shared/MacroAssembler-x86-shared.h
@@ -260,7 +260,7 @@ class MacroAssemblerX86Shared : public Assembler
         framePushed_ += sizeof(word.value);
         return pushWithPatch(word);
     }
-    CodeOffsetLabel PushWithPatch(const ImmPtr &imm) {
+    CodeOffsetLabel PushWithPatch(ImmPtr imm) {
         return PushWithPatch(ImmWord(uintptr_t(imm.value)));
     }
 
diff --git a/js/src/jit/x64/Assembler-x64.h b/js/src/jit/x64/Assembler-x64.h
index 952f7f30ae9..85ce727f542 100644
--- a/js/src/jit/x64/Assembler-x64.h
+++ b/js/src/jit/x64/Assembler-x64.h
@@ -279,7 +279,7 @@ class Assembler : public AssemblerX86Shared
             push(ScratchReg);
         }
     }
-    void push(const ImmPtr &imm) {
+    void push(ImmPtr imm) {
         push(ImmWord(uintptr_t(imm.value)));
     }
     void push(const FloatRegister &src) {
@@ -301,7 +301,7 @@ class Assembler : public AssemblerX86Shared
         masm.movq_i64r(word.value, dest.code());
         return masm.currentOffset();
     }
-    CodeOffsetLabel movWithPatch(const ImmPtr &imm, Register dest) {
+    CodeOffsetLabel movWithPatch(ImmPtr imm, Register dest) {
         return movWithPatch(ImmWord(uintptr_t(imm.value)), dest);
     }
 
diff --git a/js/src/jit/x86/Assembler-x86.h b/js/src/jit/x86/Assembler-x86.h
index 87f6212fbfd..99e948413dd 100644
--- a/js/src/jit/x86/Assembler-x86.h
+++ b/js/src/jit/x86/Assembler-x86.h
@@ -214,7 +214,7 @@ class Assembler : public AssemblerX86Shared
         movl(Imm32(word.value), dest);
         return masm.currentOffset();
     }
-    CodeOffsetLabel movWithPatch(const ImmPtr &imm, Register dest) {
+    CodeOffsetLabel movWithPatch(ImmPtr imm, Register dest) {
         return movWithPatch(ImmWord(uintptr_t(imm.value)), dest);
     }