stdin

stdin.txt

diff --git a/js/src/jit/Lowering.cpp b/js/src/jit/Lowering.cpp
--- a/js/src/jit/Lowering.cpp
+++ b/js/src/jit/Lowering.cpp
@@ -1796,17 +1796,21 @@ LIRGenerator::visitToDouble(MToDouble *c
       }
 
       case MIRType_Float32:
       {
         // Bug 1039993: this used to be useRegisterAtStart, and theoreticall, it
         // should still be, however, there is a bug in LSRA's implementation of
         // *AtStart, which is quite fundamental. This should be reverted when that
         // is fixed, or lsra is deprecated.
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS)
         LFloat32ToDouble *lir = new(alloc()) LFloat32ToDouble(useRegister(opd));
+#else
+        LFloat32ToDouble *lir = new(alloc()) LFloat32ToDouble(useRegisterAtStart(opd));
+#endif
         return define(lir, convert);
       }
 
       case MIRType_Double:
         return redefine(convert, opd);
 
       default:
         // Objects might be effectful. Symbols will throw.