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Fix analyzer tests. llvm-svn: 162588
2012-08-25 04:39:55 +08:00
// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=core,alpha.deadcode.IdempotentOperations -analyzer-max-loop 3 -verify %s
// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=core,alpha.deadcode.IdempotentOperations -analyzer-max-loop 4 -verify %s
// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=core,alpha.deadcode.IdempotentOperations %s -verify
"Fix" bogus idempotent operations warning due to loop unrolling not unrolling enough loops to show that an invariant doesn't hold. This fix is to increase the loop unrolling count to 4, which experiments show doesn't typically impact analysis time. The real fix is to modify the IdempotentOperationsChecker to suppress warnings where an analysis point could be preceded by a point where we gave up due to loop unrolling. llvm-svn: 116769
2010-10-19 07:36:05 +08:00
Fix edge case where we don't cull warnings in IdempotentOperationsChecker due to incomplete analysis of loops. llvm-svn: 125495
2011-02-15 01:59:23 +08:00
void always_warning() { int *p = 0; *p = 0xDEADBEEF; } // expected-warning{{Dereference of null pointer (loaded from variable 'p')}}
"Fix" bogus idempotent operations warning due to loop unrolling not unrolling enough loops to show that an invariant doesn't hold. This fix is to increase the loop unrolling count to 4, which experiments show doesn't typically impact analysis time. The real fix is to modify the IdempotentOperationsChecker to suppress warnings where an analysis point could be preceded by a point where we gave up due to loop unrolling. llvm-svn: 116769
2010-10-19 07:36:05 +08:00
Fix edge case where we don't cull warnings in IdempotentOperationsChecker due to incomplete analysis of loops. llvm-svn: 125495
2011-02-15 01:59:23 +08:00
// This test case previously caused a bogus idempotent operation warning
// due to us not properly culling warnings due to incomplete analysis of loops.
"Fix" bogus idempotent operations warning due to loop unrolling not unrolling enough loops to show that an invariant doesn't hold. This fix is to increase the loop unrolling count to 4, which experiments show doesn't typically impact analysis time. The real fix is to modify the IdempotentOperationsChecker to suppress warnings where an analysis point could be preceded by a point where we gave up due to loop unrolling. llvm-svn: 116769
2010-10-19 07:36:05 +08:00
int pr8403()
{
int i;
for(i=0; i<10; i++)
{
int j;
for(j=0; j+1<i; j++)
{
}
}
return 0;
}