Shr should save its Use truncating flag before Canonicalize

test/mjsunit/shr-truncating-nouint32.js

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-// Flags: --allow-natives-syntax
-
-// Should not take a very long time (n^2 algorithms are bad)
+// Flags: --allow-natives-syntax --noalways-opt --noopt_safe_uint32_operations
 
 
-function ensureNotNegative(x) {
-  return Math.max(0, x | 0);
+var two_31 = 1 << 31;
+
+function shr_0_truncating(a) {
+    return a >>> 0 | 0;
 }
 
-
-ensureNotNegative(1);
-ensureNotNegative(2);
-
-%OptimizeFunctionOnNextCall(ensureNotNegative);
-
-var r = ensureNotNegative(-1);
-
-assertEquals(0, r);
+shr_0_truncating(100);
+shr_0_truncating(100);
+%OptimizeFunctionOnNextCall(shr_0_truncating);
+assertEquals(two_31, shr_0_truncating(two_31));
+assertOptimized(shr_0_truncating);