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Diffstat (limited to 'docs/LangRef.html')
| -rw-r--r-- | docs/LangRef.html | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 596066d..b0bb562 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -2116,7 +2116,7 @@ arbitrarily change its value over its "live range". This is true because the "variable" doesn't actually <em>have a live range</em>. Instead, the value is logically read from arbitrary registers that happen to be around when needed, so the value is not neccesarily consistent over time. In fact, %A and %C need -to have the same semantics of the core LLVM "replace all uses with" concept +to have the same semantics or the core LLVM "replace all uses with" concept would not hold.</p> <div class="doc_code"> @@ -2136,7 +2136,7 @@ can be constant folded to undef because the undef could be an SNaN, and fdiv is not (currently) defined on SNaN's. However, in the second example, we can make a more aggressive assumption: because the undef is allowed to be an arbitrary value, we are allowed to assume that it could be zero. Since a divide by zero -is has <em>undefined behavior</em>, we are allowed to assume that the operation +it has <em>undefined behavior</em>, we are allowed to assume that the operation does not execute at all. This allows us to delete the divide and all code after it: since the undefined operation "can't happen", the optimizer can assume that it occurs in dead code. |