I'm splitting all Basic Blocks with minimum number of instructions (usually 3-5):
llvm::SplitBlock(BasicBlock, &*BasicBlockiter, Pass);
and trying to get object file from IR
llc -filetype=obj 2.ll
I got the following errors:
Instruction does not dominate all uses!
%1 = alloca i32
%mul = load i32* %1
Instruction does not dominate all uses!
%1 = alloca i32
%99 = load i32* %1
and
While deleting: i32 %
Use still stuck around after Def is destroyed: %var = alloca i32
Assertion failed: use_empty() && "Uses remain when a value is destroyed!"
and
error: expected instruction opcode
invoke.cont2: ; preds = %main_block, %invoke
.cont
IR:
invoke.cont2: ; preds = %main_block, %invoke.cont
%call4 = invoke i32 @_ZStorSt13_Ios_OpenmodeS_(i32 8, i32 16)
to label %invoke.cont3 unwind label %lpad1
store i32 %call4, i32* %var4
I think that after splitting, instructions are located in different basic blocks. If I split the block into 10-15 instructions, all is OK. How can I predict/check and avoid this errors?