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| author | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2017-04-15 13:37:50 +0200 |
|---|---|---|
| committer | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2018-07-01 00:18:44 +0200 |
| commit | 8cb5317fa01679fd8b2b30ffbf8dec13ae71c98d (patch) | |
| tree | a27db0ecaec527b69c4d8e7e1e5a450eb945d4bb /sparse-llvm.c | |
| parent | ea44f850aa68db74283986b47f617d38d2f63fed (diff) | |
| download | sparse-dev-8cb5317fa01679fd8b2b30ffbf8dec13ae71c98d.tar.gz | |
add PSEUDO_UNDEF & undef_pseudo()
Processing in the middle-end are much easier if undefined values
have been clearly identified. Once done, we can then make
choices like:
- give some warnings about uninitialized variables
- always initialize them to zero
- allow arbitraly simplification
- ...
Prepare this by declaring a new type of pseudo: PSEUDO_UNDEF
somewhat similar to PSEUDO_VOID.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Diffstat (limited to 'sparse-llvm.c')
| -rw-r--r-- | sparse-llvm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sparse-llvm.c b/sparse-llvm.c index d28eb6e7..cce2baa5 100644 --- a/sparse-llvm.c +++ b/sparse-llvm.c @@ -270,6 +270,9 @@ static const char *pseudo_name(pseudo_t pseudo, char *buf) case PSEUDO_VOID: buf[0] = '\0'; break; + case PSEUDO_UNDEF: + assert(0); + break; default: assert(0); } @@ -387,6 +390,9 @@ static LLVMValueRef pseudo_to_value(struct function *fn, struct symbol *ctype, p case PSEUDO_VOID: result = NULL; break; + case PSEUDO_UNDEF: + result = LLVMGetUndef(symbol_type(ctype)); + break; default: assert(0); } |