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04ff1444bb
set * Enforce the `-Zregparm=N` flag by setting the NumRegisterParameters LLVM module flag * Add assembly tests verifying that the parameters are passed in registers for reparm values 1, 2, and 3, for both LLVM intrinsics and non-builtin functions * Add c_void type to minicore
71 lines
2.1 KiB
Rust
71 lines
2.1 KiB
Rust
// Test the regparm ABI with builtin and non-builtin calls
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// Issue: https://github.com/rust-lang/rust/issues/145271
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//@ add-core-stubs
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//@ assembly-output: emit-asm
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//@ compile-flags: -O --target=i686-unknown-linux-gnu -Crelocation-model=static
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//@ revisions: REGPARM1 REGPARM2 REGPARM3
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//@[REGPARM1] compile-flags: -Zregparm=1
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//@[REGPARM2] compile-flags: -Zregparm=2
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//@[REGPARM3] compile-flags: -Zregparm=3
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//@ needs-llvm-components: x86
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#![feature(no_core)]
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#![no_std]
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#![no_core]
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#![crate_type = "lib"]
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extern crate minicore;
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use minicore::*;
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unsafe extern "C" {
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fn memset(p: *mut c_void, val: i32, len: usize) -> *mut c_void;
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fn non_builtin_memset(p: *mut c_void, val: i32, len: usize) -> *mut c_void;
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}
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn entrypoint(len: usize, ptr: *mut c_void, val: i32) -> *mut c_void {
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// REGPARM1-LABEL: entrypoint
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// REGPARM1: movl %e{{.*}}, %ecx
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// REGPARM1: pushl
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// REGPARM1: pushl
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// REGPARM1: calll memset
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// REGPARM2-LABEL: entrypoint
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// REGPARM2: movl 16(%esp), %edx
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// REGPARM2: movl %e{{.*}}, (%esp)
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// REGPARM2: movl %e{{.*}}, %eax
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// REGPARM2: calll memset
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// REGPARM3-LABEL: entrypoint
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// REGPARM3: movl %e{{.*}}, %esi
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// REGPARM3: movl %e{{.*}}, %eax
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// REGPARM3: movl %e{{.*}}, %ecx
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// REGPARM3: jmp memset
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unsafe { memset(ptr, val, len) }
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}
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn non_builtin_entrypoint(
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len: usize,
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ptr: *mut c_void,
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val: i32,
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) -> *mut c_void {
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// REGPARM1-LABEL: non_builtin_entrypoint
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// REGPARM1: movl %e{{.*}}, %ecx
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// REGPARM1: pushl
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// REGPARM1: pushl
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// REGPARM1: calll non_builtin_memset
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// REGPARM2-LABEL: non_builtin_entrypoint
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// REGPARM2: movl 16(%esp), %edx
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// REGPARM2: movl %e{{.*}}, (%esp)
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// REGPARM2: movl %e{{.*}}, %eax
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// REGPARM2: calll non_builtin_memset
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// REGPARM3-LABEL: non_builtin_entrypoint
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// REGPARM3: movl %e{{.*}}, %esi
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// REGPARM3: movl %e{{.*}}, %eax
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// REGPARM3: movl %e{{.*}}, %ecx
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// REGPARM3: jmp non_builtin_memset
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unsafe { non_builtin_memset(ptr, val, len) }
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}
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