head	1.1;
branch	1.1.1;
access;
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locks; strict;
comment	@// @;


1.1
date	2017.01.11.10.37.30;	author joerg;	state Exp;
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next	;
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1.1.1.1
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next	1.1.1.2;
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1.1.1.2
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1.1.1.1.4.1
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1.1.1.1.4.2
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1.1.1.2.4.1
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1.1.1.2.4.2
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desc
@@


1.1
log
@Initial revision
@
text
@// RUN: %clang_cc1 -analyze -std=c++11 -analyzer-checker=alpha.clone.CloneChecker -analyzer-config alpha.clone.CloneChecker:MinimumCloneComplexity=10 -verify %s

// Tests that the complexity value of a macro expansion is about the same as
// the complexity value of a normal function call and the the macro body doesn't
// influence the complexity. See the CloneSignature class in CloneDetection.h
// for more information about complexity values of clones.

#define MACRO_FOO(a, b) a > b ? -a * a : -b * b;

// First, manually apply MACRO_FOO and see if the code gets detected as a clone.
// This confirms that with the current configuration the macro body would be
// considered large enough to pass the MinimumCloneComplexity constraint.

int manualMacro(int a, int b) { // expected-warning{{Duplicate code detected}}
  return a > b ? -a * a : -b * b;
}

int manualMacroClone(int a, int b) { // expected-note{{Similar code here}}
  return a > b ? -a * a : -b * b;
}

// Now we actually use the macro to generate the same AST as above. They
// shouldn't be reported because the macros only slighly increase the complexity
// value and the resulting code will never pass the MinimumCloneComplexity
// constraint.

int macro(int a, int b) {
  return MACRO_FOO(a, b);
}

int macroClone(int a, int b) {
  return MACRO_FOO(a, b);
}

// So far we only tested that macros increase the complexity by a lesser amount
// than normal code. We also need to be sure this amount is not zero because
// we otherwise macro code would be 'invisible' for the CloneDetector.
// This tests that it is possible to increase the reach the minimum complexity
// by only using macros. This is only possible if the complexity value is bigger
// than zero.

#define NEG(A) -(A)

int nestedMacros() { // expected-warning{{Duplicate code detected}}
  return NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(1))))))))));
}

int nestedMacrosClone() { // expected-note{{Similar code here}}
  return NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(1))))))))));
}
@


1.1.1.1
log
@Import Clang pre-4.0.0 r291444.
@
text
@@


1.1.1.2
log
@Import clang r309604 from branches/release_50
@
text
@d1 1
a1 1
// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=alpha.clone.CloneChecker -analyzer-config alpha.clone.CloneChecker:MinimumCloneComplexity=10 -verify %s
@


1.1.1.2.4.1
log
@Sync with HEAD
@
text
@d4 1
a4 1
// the complexity value of a normal function call and the macro body doesn't
d23 1
a23 1
// shouldn't be reported because the macros only slightly increase the complexity
@


1.1.1.2.4.2
log
@Mostly merge changes from HEAD upto 20200411
@
text
@@


1.1.1.2.2.1
log
@Sync with HEAD
@
text
@d4 1
a4 1
// the complexity value of a normal function call and the macro body doesn't
d23 1
a23 1
// shouldn't be reported because the macros only slightly increase the complexity
@


1.1.1.3
log
@Import clang r337282 from trunk
@
text
@d4 1
a4 1
// the complexity value of a normal function call and the macro body doesn't
d23 1
a23 1
// shouldn't be reported because the macros only slightly increase the complexity
@


1.1.1.4
log
@Mark old LLVM instance as dead.
@
text
@@


1.1.1.1.4.1
log
@file macro-complexity.cpp was added on branch pgoyette-localcount on 2017-03-20 06:52:48 +0000
@
text
@d1 50
@


1.1.1.1.4.2
log
@Sync with HEAD
@
text
@a0 50
// RUN: %clang_cc1 -analyze -std=c++11 -analyzer-checker=alpha.clone.CloneChecker -analyzer-config alpha.clone.CloneChecker:MinimumCloneComplexity=10 -verify %s

// Tests that the complexity value of a macro expansion is about the same as
// the complexity value of a normal function call and the the macro body doesn't
// influence the complexity. See the CloneSignature class in CloneDetection.h
// for more information about complexity values of clones.

#define MACRO_FOO(a, b) a > b ? -a * a : -b * b;

// First, manually apply MACRO_FOO and see if the code gets detected as a clone.
// This confirms that with the current configuration the macro body would be
// considered large enough to pass the MinimumCloneComplexity constraint.

int manualMacro(int a, int b) { // expected-warning{{Duplicate code detected}}
  return a > b ? -a * a : -b * b;
}

int manualMacroClone(int a, int b) { // expected-note{{Similar code here}}
  return a > b ? -a * a : -b * b;
}

// Now we actually use the macro to generate the same AST as above. They
// shouldn't be reported because the macros only slighly increase the complexity
// value and the resulting code will never pass the MinimumCloneComplexity
// constraint.

int macro(int a, int b) {
  return MACRO_FOO(a, b);
}

int macroClone(int a, int b) {
  return MACRO_FOO(a, b);
}

// So far we only tested that macros increase the complexity by a lesser amount
// than normal code. We also need to be sure this amount is not zero because
// we otherwise macro code would be 'invisible' for the CloneDetector.
// This tests that it is possible to increase the reach the minimum complexity
// by only using macros. This is only possible if the complexity value is bigger
// than zero.

#define NEG(A) -(A)

int nestedMacros() { // expected-warning{{Duplicate code detected}}
  return NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(1))))))))));
}

int nestedMacrosClone() { // expected-note{{Similar code here}}
  return NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(NEG(1))))))))));
}
@


