Hello, I am a llvm beginner. I recently try to run my own toy-c-compiler project but the executable file has unexpected results. Here are my test codes, LLVM IR codes and assembly codes. TEST CODE extern void printi(int n); extern void scanfi(int* intaddr); int main(){ int a = 1; int b =…

%addtmp is the result of an addition. Then you load %a from memory to %a4 and print %a4. But you leave %addtmp unused. addrspace is usually for GPUs. For CPUs you don’t need addrspace.

Problems in the transformation from LLVM IR code to x86-64 executable file

Beginners

tschuett May 27, 2023, 7:27am 6

LLVM uses opaque pointers.

ptr is a pointer. addrspace(4) does not say anything about the type.

%a3 = load i32, ptr %a, align 4

In the load instruction, you specify the type.

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Problems in the transformation from LLVM IR code to x86-64 executable file

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