live-stmts.cpp
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// RUN: %clang_analyze_cc1 -w -analyzer-checker=debug.DumpLiveExprs %s 2>&1\
// RUN: | FileCheck %s
int coin();
int testThatDumperWorks(int x, int y, int z) {
return x ? y : z;
}
// [B5 (ENTRY)]
// |
// V
// [B4 (x)] ? [B2 (y)] : [B3 (z)]
// \ /
// ---|----
// V
// [B1] --> [B0 (EXIT)]
// return
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'y' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'z' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: ImplicitCastExpr {{.*}} <IntegralToBoolean>
// CHECK-NEXT: `-ImplicitCastExpr {{.*}} <LValueToRValue>
// CHECK-NEXT: `-DeclRefExpr {{.*}} 'x' 'int'
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B3 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'y' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'z' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: ImplicitCastExpr {{.*}} <IntegralToBoolean>
// CHECK-NEXT: `-ImplicitCastExpr {{.*}} <LValueToRValue>
// CHECK-NEXT: `-DeclRefExpr {{.*}} 'x' 'int'
// CHECK: [ B4 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'y' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'z' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: ImplicitCastExpr {{.*}} <IntegralToBoolean>
// CHECK-NEXT: `-ImplicitCastExpr {{.*}} <LValueToRValue>
// CHECK-NEXT: `-DeclRefExpr {{.*}} 'x' 'int'
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B5 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'y' 'int'
// CHECK-EMPTY:
// CHECK-NEXT: DeclRefExpr {{.*}} 'z' 'int'
// CHECK-EMPTY:
// CHECK-EMPTY:
void testIfBranchExpression(bool flag) {
// No expressions should be carried over from one block to another here.
while (flag) {
int e = 1;
if (true)
e;
}
}
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B3 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B4 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B5 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
void testWhileBodyExpression(bool flag) {
// No expressions should be carried over from one block to another here.
while (flag) {
int e = 1;
while (coin())
e;
}
}
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B3 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B4 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B5 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
void testDoWhileBodyExpression(bool flag) {
// No expressions should be carried over from one block to another here.
while (flag) {
int e = 1;
do
e;
while (coin());
}
}
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B3 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B4 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B5 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
void testForBodyExpression(bool flag) {
// No expressions should be carried over from one block to another here.
while (flag) {
int e = 1;
for (; coin();)
e;
}
}
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B3 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B4 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK: [ B5 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
void clang_analyzer_eval(bool);
void test_lambda_refcapture() {
int a = 6;
[&](int &a) { a = 42; }(a);
clang_analyzer_eval(a == 42); // expected-warning{{TRUE}}
}
// CHECK: [ B0 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK-NEXT: [ B1 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY:
// CHECK-NEXT: [ B2 (live expressions at block exit) ]
// CHECK-EMPTY:
// CHECK-EMPTY: