ff00110543
Rust's current mangling scheme depends on compiler internals; loses information about generic parameters (and other things) which makes for a worse experience when using external tools that need to interact with Rust symbol names; is inconsistent; and can contain `.` characters which aren't universally supported. Therefore, Rust has defined its own symbol mangling scheme which is defined in terms of the Rust language, not the compiler implementation; encodes information about generic parameters in a reversible way; has a consistent definition; and generates symbols that only use the characters `A-Z`, `a-z`, `0-9`, and `_`. Support for the new Rust symbol mangling scheme has been added to upstream tools that will need to interact with Rust symbols (e.g. debuggers). This commit changes the default symbol mangling scheme from the legacy scheme to the new Rust mangling scheme. Signed-off-by: David Wood <david.wood@huawei.com>
59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
//@ only-x86_64
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//@ ignore-sgx Tests incompatible with LVI mitigations
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//@ assembly-output: emit-asm
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// make sure the feature is not enabled at compile-time
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//@ compile-flags: -C opt-level=3 -C target-feature=-sse4.1 -C llvm-args=-x86-asm-syntax=intel
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#![crate_type = "rlib"]
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use std::arch::x86_64::{__m128, _mm_blend_ps};
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// Use an explicit return pointer to prevent tail call optimization.
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#[no_mangle]
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pub unsafe fn sse41_blend_nofeature(x: __m128, y: __m128, ret: *mut __m128) {
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let f = {
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// check that _mm_blend_ps is not being inlined into the closure
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// CHECK-LABEL: {{sse41_blend_nofeature:}}
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// CHECK-NOT: blendps
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// CHECK: {{call .*_mm_blend_ps.*}}
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// CHECK-NOT: blendps
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// CHECK: ret
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#[inline(never)]
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|x, y, ret: *mut __m128| unsafe { *ret = _mm_blend_ps(x, y, 0b0101) }
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};
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f(x, y, ret);
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}
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#[no_mangle]
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#[target_feature(enable = "sse4.1")]
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pub fn sse41_blend_noinline(x: __m128, y: __m128) -> __m128 {
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let f = {
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// check that _mm_blend_ps is being inlined into the closure
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// CHECK-LABEL: {{sse41_blend_noinline:}}
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// CHECK-NOT: _mm_blend_ps
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// CHECK: blendps
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// CHECK-NOT: _mm_blend_ps
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// CHECK: ret
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#[inline(never)]
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|x, y| unsafe { _mm_blend_ps(x, y, 0b0101) }
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};
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f(x, y)
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}
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#[no_mangle]
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#[target_feature(enable = "sse4.1")]
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pub fn sse41_blend_doinline(x: __m128, y: __m128) -> __m128 {
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// check that the closure and _mm_blend_ps are being inlined into the function
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// CHECK-LABEL: sse41_blend_doinline:
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// CHECK-NOT: {{sse41_blend_doinline:}}
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// CHECK-NOT: _mm_blend_ps
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// CHECK: blendps
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// CHECK-NOT: {{sse41_blend_doinline.*}}
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// CHECK-NOT: _mm_blend_ps
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// CHECK: ret
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let f = {
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#[inline]
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|x, y| unsafe { _mm_blend_ps(x, y, 0b0101) }
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};
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f(x, y)
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}
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