[llvm-stress] Ensure that the C++11 random device respects its min/max values (PR32585)
As noted on PR32585, the change in D29780/rL295325 resulted in calls to Rand32() (values 0 -> 0xFFFFFFFF) but the min()/max() operators indicated it would be (0 -> 0x7FFFF).
This patch changes the random operator to call Rand() instead which does respect the 0 -> 0x7FFFF range and asserts that the value is in range as well.
Differential Revision: https://reviews.llvm.org/D34089
llvm-svn: 306281
diff --git a/llvm/tools/llvm-stress/llvm-stress.cpp b/llvm/tools/llvm-stress/llvm-stress.cpp
index ba1d573..6e2b8d3 100644
--- a/llvm/tools/llvm-stress/llvm-stress.cpp
+++ b/llvm/tools/llvm-stress/llvm-stress.cpp
@@ -116,10 +116,14 @@
/// Make this like a C++11 random device
typedef uint32_t result_type;
- uint32_t operator()() { return Rand32(); }
static constexpr result_type min() { return 0; }
static constexpr result_type max() { return 0x7ffff; }
-
+ uint32_t operator()() {
+ uint32_t Val = Rand();
+ assert(Val <= max() && "Random value out of range");
+ return Val;
+ }
+
private:
unsigned Seed;
};