Fix bug in the call to random number generator in Cfg's ctor

tests_lit/llvm2ice_tests/rng.ll

 ; This is a smoke test of random number generator.
 ; The random number generators for different randomization passes should be
 ; decoupled. The random number used in one randomization pass should not be
 ; influenced by the existence of other randomization passes.
 
 ; REQUIRES: allow_dump, target_X8632
 
 ; Command for checking constant blinding (Need to turn off nop-insertion)
 ; RUN: %p2i --target x8632 -i %s --filetype=obj --disassemble --args -O2 \
 ; RUN:    -sz-seed=1 -randomize-pool-immediates=randomize \
@@ skipping 127 matching lines @@
 
 define float @func2(float* %arg) {
 entry:
   %arg.int = ptrtoint float* %arg to i32
   %addr.int = add i32 %arg.int, 200000
   %addr.ptr = inttoptr i32 %addr.int to float*
   %addr.load = load float, float* %addr.ptr, align 4
   ret float %addr.load
 
 ; BLINDINGO2-LABEL: func2
-; BLINDINGO2: lea [[REG:e[a-z]*]],{{[[]}}{{e[a-z]*}}+0x32c814{{[]]}}
+; BLINDINGO2: lea [[REG:e[a-z]*]],{{[[]}}{{e[a-z]*}}+0x69ed4ee7{{[]]}}
 }
 
 define float @func3(i32 %arg, float %input) {
 entry:
   switch i32 %arg, label %return [
     i32 0, label %sw.bb
     i32 1, label %sw.bb1
     i32 2, label %sw.bb2
     i32 3, label %sw.bb3
     i32 4, label %sw.bb4
@@ skipping 63 matching lines @@
 ; BBREORDERING: .Lfunc5$BB4:
 ; BBREORDERING: .Lfunc5$BB3
 }
 
 define i32 @func6(i32 %arg) {
 entry:
   %res = add i32 200000, %arg
   ret i32 %res
 
 ; BLINDINGO2-LABEL: func6
-; BLINDINGO2: mov [[REG:e[a-z]*]],0xb178f
-; BLINDINGO2-NEXT: lea [[REG]],{{[[]}}[[REG]]-0x80a4f{{[]]}}
+; BLINDINGO2: mov [[REG:e[a-z]*]],0x77254ee7
+; BLINDINGO2-NEXT: lea [[REG]],{{[[]}}[[REG]]-0x772241a7{{[]]}}
 }
 
 ; Check for function reordering
 ; FUNCREORDERING-LABEL: func1
 ; FUNCREORDERING-LABEL: func4
 ; FUNCREORDERING-LABEL: func5
 ; FUNCREORDERING-LABEL: func2
 ; FUNCREORDERING-LABEL: func6
 ; FUNCREORDERING-LABEL: func3
 
 ; Check for global variable reordering
 ; GLOBALVARS-LABEL: ArrayInit
 ; GLOBALVARS-LABEL: PrimitiveInit
 ; GLOBALVARS-LABEL: ArrayInitPartial
 ; GLOBALVARS-LABEL: PrimitiveUninit
 ; GLOBALVARS-LABEL: ArrayUninit
 ; GLOBALVARS-LABEL: PrimitiveInitStatic
 ; GLOBALVARS-LABEL: ArrayUninitConstDouble
 ; GLOBALVARS-LABEL: ArrayUninitConstInt
 ; GLOBALVARS-LABEL: PrimitiveInitConst
 
 ; Check for pooled constant reordering
 ; POOLEDCONSTANTS-LABEL: .rodata.cst4
 ; POOLEDCONSTANTS: 0000803e 0000803f 00000000 0000003f
 ; POOLEDCONSTANTS: 00008040 00000040