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| author | NAKAMURA Takumi <geek4civic@gmail.com> | 2025-01-09 17:16:04 +0900 |
|---|---|---|
| committer | NAKAMURA Takumi <geek4civic@gmail.com> | 2025-01-09 17:16:04 +0900 |
| commit | 0aa930a41f2d1ebf1fa90ec42da8f96d15a4dcbb (patch) | |
| tree | 6a77b463f700e090df586672c26b9fe765fd115b /clang/test/Analysis/loop-unrolling.cpp | |
| parent | ec6892d1c979ce0b84c86918d5cdbb03037b409a (diff) | |
| parent | 6d16b1c5c468a79ecf867293023c89ac518ecdda (diff) | |
| download | llvm-users/chapuni/cov/single/nextcount-base.zip llvm-users/chapuni/cov/single/nextcount-base.tar.gz llvm-users/chapuni/cov/single/nextcount-base.tar.bz2 | |
Merge branch 'users/chapuni/cov/single/pair' into users/chapuni/cov/single/nextcount-baseusers/chapuni/cov/single/nextcount-base
Diffstat (limited to 'clang/test/Analysis/loop-unrolling.cpp')
| -rw-r--r-- | clang/test/Analysis/loop-unrolling.cpp | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/clang/test/Analysis/loop-unrolling.cpp b/clang/test/Analysis/loop-unrolling.cpp index 66a828a..bf05a77 100644 --- a/clang/test/Analysis/loop-unrolling.cpp +++ b/clang/test/Analysis/loop-unrolling.cpp @@ -63,7 +63,7 @@ int simple_no_unroll1() { int a[9]; int k = 42; for (int i = 0; i < 9; i++) { - clang_analyzer_numTimesReached(); // expected-warning {{4}} + clang_analyzer_numTimesReached(); // expected-warning {{2}} a[i] = 42; foo(i); } @@ -76,7 +76,7 @@ int simple_no_unroll2() { int k = 42; int i; for (i = 0; i < 9; i++) { - clang_analyzer_numTimesReached(); // expected-warning {{4}} + clang_analyzer_numTimesReached(); // expected-warning {{2}} a[i] = 42; i += getNum(); } @@ -309,9 +309,9 @@ int nested_inner_unrolled() { int k = 42; int j = 0; for (int i = 0; i < getNum(); i++) { - clang_analyzer_numTimesReached(); // expected-warning {{4}} + clang_analyzer_numTimesReached(); // expected-warning {{2}} for (j = 0; j < 8; ++j) { - clang_analyzer_numTimesReached(); // expected-warning {{32}} + clang_analyzer_numTimesReached(); // expected-warning {{16}} a[j] = 22; } a[i] = 42; @@ -346,11 +346,7 @@ int simple_known_bound_loop() { int simple_unknown_bound_loop() { for (int i = 2; i < getNum(); i++) { -#ifdef DFS - clang_analyzer_numTimesReached(); // expected-warning {{16}} -#else clang_analyzer_numTimesReached(); // expected-warning {{8}} -#endif } return 0; } @@ -368,11 +364,7 @@ int nested_inlined_unroll1() { int nested_inlined_no_unroll1() { int k; for (int i = 0; i < 9; i++) { -#ifdef DFS - clang_analyzer_numTimesReached(); // expected-warning {{18}} -#else - clang_analyzer_numTimesReached(); // expected-warning {{14}} -#endif + clang_analyzer_numTimesReached(); // expected-warning {{10}} k = simple_unknown_bound_loop(); // reevaluation without inlining, splits the state as well } int a = 22 / k; // no-warning @@ -475,9 +467,13 @@ int num_steps_over_limit2() { int num_steps_on_limit3() { for (int i = 0; i < getNum(); i++) { - clang_analyzer_numTimesReached(); // expected-warning {{4}} + clang_analyzer_numTimesReached(); // expected-warning {{2}} for (int j = 0; j < 32; j++) { - clang_analyzer_numTimesReached(); // expected-warning {{128}} + // Here the loop unrollig logic calculates with four potential iterations + // in the outer loop where it cannot determine the iteration count in + // advance; but after two loops the analyzer conservatively assumes that + // the (still opaque) loop condition is false. + clang_analyzer_numTimesReached(); // expected-warning {{64}} } } return 0; @@ -493,6 +489,15 @@ int num_steps_over_limit3() { return 0; } +int num_steps_on_limit4() { + for (int i = 0; i < 4; i++) { + clang_analyzer_numTimesReached(); // expected-warning {{4}} + for (int j = 0; j < 32; j++) { + clang_analyzer_numTimesReached(); // expected-warning {{128}} + } + } + return 0; +} void pr34943() { for (int i = 0; i < 6L; ++i) { |