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| author | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-12-16 18:23:00 +0000 |
|---|---|---|
| committer | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-12-16 18:23:00 +0000 |
| commit | 805e22b2051e9c6a75377ea6599654d7415da483 (patch) | |
| tree | c259697c448b0c6f548f153c48c46a8d7a75970f /gcc/basic-block.h | |
| parent | 2c27ce73ee2229b0871c4ccad2342d8a4be85eff (diff) | |
| download | gcc-805e22b2051e9c6a75377ea6599654d7415da483.tar.gz | |
Merge basic-improvements-branch to trunk
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@60174 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/basic-block.h')
| -rw-r--r-- | gcc/basic-block.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/basic-block.h b/gcc/basic-block.h index 10c895408f2..a72b9b9dc3c 100644 --- a/gcc/basic-block.h +++ b/gcc/basic-block.h @@ -112,7 +112,11 @@ do { \ be done, other than zero the statistics on the first allocation. */ #define MAX_REGNO_REG_SET(NUM_REGS, NEW_P, RENUMBER_P) -/* Type we use to hold basic block counters. Should be at least 64bit. */ +/* Type we use to hold basic block counters. Should be at least + 64bit. Although a counter cannot be negative, we use a signed + type, because erroneous negative counts can be generated when the + flow graph is manipulated by various optimizations. A signed type + makes those easy to detect. */ typedef HOST_WIDEST_INT gcov_type; /* Control flow edge information. */ |