diff options
author | Eli Friedman <efriedma@codeaurora.org> | 2017-01-12 19:51:44 +0000 |
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committer | Eli Friedman <efriedma@codeaurora.org> | 2017-01-12 19:51:44 +0000 |
commit | 6535a57ff4dc2bbecfb255093832af8e0b2aa0b7 (patch) | |
tree | 10fc33a06f3609a1880c910e94e744f117e71e79 | |
parent | 3840cfcb048c98504efd8e88789b6e5949db9158 (diff) |
Add additional testcases for nsw markings on ++ and --.
clang has generated correct IR for char/short decrement since r126816,
but we didn't have any test coverage for decrement.
Patch by Andrew Rogers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@291805 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | test/CodeGen/integer-overflow.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/test/CodeGen/integer-overflow.c b/test/CodeGen/integer-overflow.c index 6a7c3e51ee..0b28bc5b8a 100644 --- a/test/CodeGen/integer-overflow.c +++ b/test/CodeGen/integer-overflow.c @@ -65,13 +65,37 @@ void test1() { // TRAPV: getelementptr inbounds i32, i32* // CATCH_UB: getelementptr inbounds i32, i32* - // PR9350: char increment never overflows. - extern volatile signed char PR9350; + // PR9350: char pre-increment never overflows. + extern volatile signed char PR9350_char_inc; // DEFAULT: add i8 {{.*}}, 1 // WRAPV: add i8 {{.*}}, 1 // TRAPV: add i8 {{.*}}, 1 // CATCH_UB: add i8 {{.*}}, 1 - ++PR9350; + ++PR9350_char_inc; + + // PR9350: char pre-decrement never overflows. + extern volatile signed char PR9350_char_dec; + // DEFAULT: add i8 {{.*}}, -1 + // WRAPV: add i8 {{.*}}, -1 + // TRAPV: add i8 {{.*}}, -1 + // CATCH_UB: add i8 {{.*}}, -1 + --PR9350_char_dec; + + // PR9350: short pre-increment never overflows. + extern volatile signed short PR9350_short_inc; + // DEFAULT: add i16 {{.*}}, 1 + // WRAPV: add i16 {{.*}}, 1 + // TRAPV: add i16 {{.*}}, 1 + // CATCH_UB: add i16 {{.*}}, 1 + ++PR9350_short_inc; + + // PR9350: short pre-decrement never overflows. + extern volatile signed short PR9350_short_dec; + // DEFAULT: add i16 {{.*}}, -1 + // WRAPV: add i16 {{.*}}, -1 + // TRAPV: add i16 {{.*}}, -1 + // CATCH_UB: add i16 {{.*}}, -1 + --PR9350_short_dec; // PR24256: don't instrument __builtin_frame_address. __builtin_frame_address(0 + 0); |