khchen added a comment.
In D71387#1790413 <https://reviews.llvm.org/D71387#1790413>, @efriedma wrote:
> > But in RISCV clang emits the same IR for different ABI (-mabi),
>
> This is not true. For simple cases, it does, yes, but there are some weird
> edge cases for functions with many arguments.
It's interesting, I didn't find the edge cases for functions with many
arguments.
but you are right, I found a case when passing struct as argument,
different `-mabi` will generate incompatible function interface.
struct bar{
int a;
float b;
};
float foo(struct bar a, struct bar b){ ...}
compiled with `-march=rv32imafc -mabi=ilp32f`: `define dso_local float @foo(i32
%0, float %1, i32 %2, float %3)`
compiled with `-march=rv32imafc -mabi=-ilp32`: `define dso_local float @foo([2
x i32] %a.coerce, [2 x i32] %b.coerce) `
@efriedma thanks for your suggestions.
Repository:
rG LLVM Github Monorepo
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https://reviews.llvm.org/D71387/new/
https://reviews.llvm.org/D71387
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