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ctg01
2008 Jan 22
0
[LLVMdev] [llvm-commits] a question about type conversion propagation and elimination
...8* %ptr, i32 1 ; <i8*> [#uses=1]
br label %B2
B2: ; preds = %B1, %Entry
%eax.0.in = phi i8* [ %ctg2, %B1 ], [ %ptr, %Entry ] ; <i8*> [#uses=4]
icmp ult i8* %eax.0.in, %end ; <i1>:1 [#uses=1]
br i1 %1, label %B3, label %exit
B3: ; preds = %B2
store i8 1, i8* %eax.0.in
%ctg21 = getelementptr i8* %eax.0.in, i32 1 ; <i8*> [#uses=1]
br label %exit
exit: ; preds = %B3, %B2
%eax.1.in = phi i8* [ %ctg21, %B3 ], [ %eax.0.in, %B2 ] ; <i8*>
[#uses=1]
ret i8* %eax.1.in
}
Note that it eliminated all the ptrtoint casts (in this case) and
infered some getelem...