2f000a78bf
This should have no real effect in most cases, as e.g. `hidden`
visibility already implies `dso_local` (or at least LLVM IR does not
preserve the `dso_local` setting if the item is already `hidden`), but
it should fix `-Crelocation-model=static` and improve codegen in
executables.
Note that this PR does not exhaustively port the logic in [clang]. Only
the obviously correct portion and what is necessary to fix a regression
from LLVM 12 that relates to `-Crelocation_model=static`.
Fixes #83335
[clang]: 3001d080c8/clang/lib/CodeGen/CodeGenModule.cpp (L945-L1039)
45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
// compile-flags: -O
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#![crate_type = "lib"]
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// CHECK: define{{.*}}{ i8, i8 } @pair_bool_bool(i1 zeroext %pair.0, i1 zeroext %pair.1)
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#[no_mangle]
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pub fn pair_bool_bool(pair: (bool, bool)) -> (bool, bool) {
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pair
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}
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// CHECK: define{{.*}}{ i8, i32 } @pair_bool_i32(i1 zeroext %pair.0, i32 %pair.1)
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#[no_mangle]
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pub fn pair_bool_i32(pair: (bool, i32)) -> (bool, i32) {
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pair
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}
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// CHECK: define{{.*}}{ i32, i8 } @pair_i32_bool(i32 %pair.0, i1 zeroext %pair.1)
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#[no_mangle]
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pub fn pair_i32_bool(pair: (i32, bool)) -> (i32, bool) {
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pair
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}
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// CHECK: define{{.*}}{ i8, i8 } @pair_and_or(i1 zeroext %_1.0, i1 zeroext %_1.1)
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#[no_mangle]
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pub fn pair_and_or((a, b): (bool, bool)) -> (bool, bool) {
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// Make sure it can operate directly on the unpacked args
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// (but it might not be using simple and/or instructions)
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// CHECK-DAG: %_1.0
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// CHECK-DAG: %_1.1
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(a && b, a || b)
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}
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// CHECK: define{{.*}}void @pair_branches(i1 zeroext %_1.0, i1 zeroext %_1.1)
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#[no_mangle]
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pub fn pair_branches((a, b): (bool, bool)) {
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// Make sure it can branch directly on the unpacked bool args
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// CHECK: br i1 %_1.0
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if a {
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println!("Hello!");
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}
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// CHECK: br i1 %_1.1
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if b {
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println!("Goodbye!");
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}
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}
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