diff options
| -rw-r--r-- | lib/Target/README.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index e63df536ae..55c08173d2 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1963,3 +1963,15 @@ bb3: ; preds = %entry ret i32 %b } //===---------------------------------------------------------------------===// +We should fold this code into "ret i1 false" since neither %zero nor %one can +ever be null pointers. + +define i1 @foo(i1 %cond) { + %zero = alloca i32 + %one = alloca i32 + + %ptr = select i1 %cond, i32* %zero, i32* %one + %isnull = icmp eq i32* %ptr, null + ret i1 %isnull +} +//===---------------------------------------------------------------------===// |