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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
commit | a4b7ed7a42c716ab9f05e351f003d589124fd55d (patch) | |
tree | b620cd3f223850b28716e474e80c58059dca5dd4 /tests/codegen/asm-options.rs | |
parent | Adding upstream version 1.67.1+dfsg1. (diff) | |
download | rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.tar.xz rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.zip |
Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/asm-options.rs')
-rw-r--r-- | tests/codegen/asm-options.rs | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/tests/codegen/asm-options.rs b/tests/codegen/asm-options.rs new file mode 100644 index 000000000..963b60cfe --- /dev/null +++ b/tests/codegen/asm-options.rs @@ -0,0 +1,104 @@ +// compile-flags: -O +// only-x86_64 + +#![crate_type = "rlib"] + +use std::arch::asm; + +// CHECK-LABEL: @pure +// CHECK-NOT: asm +// CHECK: ret void +#[no_mangle] +pub unsafe fn pure(x: i32) { + let y: i32; + asm!("", out("ax") y, in("cx") x, options(pure, nomem)); +} + +// CHECK-LABEL: @noreturn +// CHECK: call void asm +// CHECK-NEXT: unreachable +#[no_mangle] +pub unsafe fn noreturn() { + asm!("", options(noreturn)); +} + +pub static mut VAR: i32 = 0; +pub static mut DUMMY_OUTPUT: i32 = 0; + +// CHECK-LABEL: @readonly +// CHECK: call i32 asm +// CHECK: ret i32 1 +#[no_mangle] +pub unsafe fn readonly() -> i32 { + VAR = 1; + asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly)); + VAR +} + +// CHECK-LABEL: @not_readonly +// CHECK: call i32 asm +// CHECK: ret i32 % +#[no_mangle] +pub unsafe fn not_readonly() -> i32 { + VAR = 1; + asm!("", out("ax") DUMMY_OUTPUT, options()); + VAR +} + +// CHECK-LABEL: @nomem +// CHECK-NOT: store +// CHECK: call i32 asm +// CHECK: store +// CHECK: ret i32 2 +#[no_mangle] +pub unsafe fn nomem() -> i32 { + VAR = 1; + asm!("", out("ax") DUMMY_OUTPUT, options(pure, nomem)); + VAR = 2; + VAR +} + +// CHECK-LABEL: @nomem_nopure +// CHECK-NOT: store +// CHECK: call i32 asm +// CHECK: store +// CHECK: ret i32 2 +#[no_mangle] +pub unsafe fn nomem_nopure() -> i32 { + VAR = 1; + asm!("", out("ax") DUMMY_OUTPUT, options(nomem)); + VAR = 2; + VAR +} + +// CHECK-LABEL: @not_nomem +// CHECK: store +// CHECK: call i32 asm +// CHECK: store +// CHECK: ret i32 2 +#[no_mangle] +pub unsafe fn not_nomem() -> i32 { + VAR = 1; + asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly)); + VAR = 2; + VAR +} + +// CHECK-LABEL: @dont_remove_nonpure +// CHECK: call void asm +// CHECK: call void asm +// CHECK: call void asm +// CHECK: ret void +#[no_mangle] +pub unsafe fn dont_remove_nonpure() { + asm!("", options()); + asm!("", options(nomem)); + asm!("", options(readonly)); +} + +// CHECK-LABEL: @raw +// CHECK: call void asm sideeffect inteldialect "{} {}", ""() +#[no_mangle] +pub unsafe fn raw() { + asm!("{} {}", options(nostack, nomem, preserves_flags, raw)); +} |