c - Comparison operation being completely ignored -

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I am trying to write a test program to create a library. This test program is supposed to test every possible value that goes into some functions. Here's the code: 

  zero test_int8_smr () {for (int i = INT8_MIN; i & lt; = INT8_MAX; i ++) {int8_t testval = i; Int8_t Results = from_int8_smr (to_int8_smr (TESTAL)); If (testle! = Result) {if (testval == 0x80) // If this statement is ignored {continue}; } Printf ("test_int8_smr () failed: testwall = 0x% 02hhX, result = 0x% 02hhX \ n", test, result); Return; }} Printf ("test_int8_smr () succeeds for all possible values. \ N"); }

Here is the output:

test_int8_smr () failed: testval = 0x80, result = 0x00

If the statement appears to be ignored: 

  if (testval == 0x80) {continue; }

This is very confusing, why any thoughts are arising and how to fix it?

testals type int8_t hence its possible values The range is -0x80 to 0x7f . It can never be equal to 0x80 and thus the relation of equality is always false and subject to continuous folding and dead code removal.


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