Legalize i64.const by breaking it into two i32.const, on 32-bits platforms;

cranelift/filetests/filetests/isa/x86/legalize-custom.clif

@@ -62,14 +62,6 @@ ebb0:
     return v1
 }
 
-function %f64const() -> f64 {
-ebb0:
-    v1 = f64const 0x1.0p1
-    ; check: $(tmp=$V) = iconst.i64
-    ; check: v1 = bitcast.f64 $tmp
-    return v1
-}
-
 function %select_f64(f64, f64, i32) -> f64 {
 ebb0(v0: f64, v1: f64, v2: i32):
     v3 = select v2, v0, v1

cranelift/filetests/filetests/isa/x86/legalize-f64const-x64.clif

@@ -0,0 +1,13 @@
+; Test the legalization of f64const.
+test legalizer
+target x86_64
+
+; regex: V=v\d+
+
+function %f64const() -> f64 {
+ebb0:
+    v1 = f64const 0x1.0p1
+    ; check: $(tmp=$V) = iconst.i64
+    ; check: v1 = bitcast.f64 $tmp
+    return v1
+}

cranelift/filetests/filetests/legalizer/iconst-i64.clif

@@ -0,0 +1,12 @@
+test legalizer
+target i686
+
+function %foo() -> i64 {
+ebb0:
+    v1 = iconst.i64 0x6400000042
+    return v1
+}
+
+; check: v2 = iconst.i32 66
+; check: v3 = iconst.i32 100
+; check: v1 = iconcat v2, v3