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Make SSA aggregates without needing an alloca
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Original file line number | Diff line number | Diff line change |
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@@ -1,39 +1,123 @@ | ||
//@ compile-flags: -O -C no-prepopulate-passes | ||
//@ compile-flags: -O -C no-prepopulate-passes -Z randomize-layout=no | ||
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#![crate_type = "lib"] | ||
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#[repr(transparent)] | ||
struct Transparent32(u32); | ||
pub struct Transparent32(u32); | ||
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// CHECK: i32 @make_transparent(i32 noundef %x) | ||
#[no_mangle] | ||
pub fn make_transparent(x: u32) -> Transparent32 { | ||
// CHECK: %a = alloca i32 | ||
// CHECK: store i32 %x, ptr %a | ||
// CHECK: %[[TEMP:.+]] = load i32, ptr %a | ||
// CHECK: ret i32 %[[TEMP]] | ||
// CHECK-NOT: alloca | ||
// CHECK: ret i32 %x | ||
let a = Transparent32(x); | ||
a | ||
} | ||
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// CHECK: i32 @make_closure(i32 noundef %x) | ||
#[no_mangle] | ||
pub fn make_closure(x: i32) -> impl Fn(i32) -> i32 { | ||
// CHECK: %[[ALLOCA:.+]] = alloca i32 | ||
// CHECK: store i32 %x, ptr %[[ALLOCA]] | ||
// CHECK: %[[TEMP:.+]] = load i32, ptr %[[ALLOCA]] | ||
// CHECK: ret i32 %[[TEMP]] | ||
// CHECK-NOT: alloca | ||
// CHECK: ret i32 %x | ||
move |y| x + y | ||
} | ||
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#[repr(transparent)] | ||
pub struct TransparentPair((), (u16, u16), ()); | ||
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// CHECK: { i16, i16 } @make_transparent_pair(i16 noundef %x.0, i16 noundef %x.1) | ||
#[no_mangle] | ||
pub fn make_transparent_pair(x: (u16, u16)) -> TransparentPair { | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i16, i16 } poison, i16 %x.0, 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i16, i16 } %[[TEMP0]], i16 %x.1, 1 | ||
// CHECK: ret { i16, i16 } %[[TEMP1]] | ||
let a = TransparentPair((), x, ()); | ||
a | ||
} | ||
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// CHECK-LABEL: { i32, i32 } @make_2_tuple(i32 noundef %x) | ||
#[no_mangle] | ||
pub fn make_2_tuple(x: u32) -> (u32, u32) { | ||
// CHECK: %pair = alloca { i32, i32 } | ||
// CHECK: store i32 | ||
// CHECK: store i32 | ||
// CHECK: load i32 | ||
// CHECK: load i32 | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i32, i32 } poison, i32 %x, 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i32, i32 } %[[TEMP0]], i32 %x, 1 | ||
// CHECK: ret { i32, i32 } %[[TEMP1]] | ||
let pair = (x, x); | ||
pair | ||
} | ||
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// CHECK-LABEL: i8 @make_cell_of_bool(i1 noundef zeroext %b) | ||
#[no_mangle] | ||
pub fn make_cell_of_bool(b: bool) -> std::cell::Cell<bool> { | ||
// CHECK: %[[BYTE:.+]] = zext i1 %b to i8 | ||
// CHECK: ret i8 %[[BYTE]] | ||
std::cell::Cell::new(b) | ||
} | ||
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// CHECK-LABLE: { i8, i16 } @make_cell_of_bool_and_short(i1 noundef zeroext %b, i16 noundef %s) | ||
#[no_mangle] | ||
pub fn make_cell_of_bool_and_short(b: bool, s: u16) -> std::cell::Cell<(bool, u16)> { | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[BYTE:.+]] = zext i1 %b to i8 | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i8, i16 } poison, i8 %[[BYTE]], 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i8, i16 } %[[TEMP0]], i16 %s, 1 | ||
// CHECK: ret { i8, i16 } %[[TEMP1]] | ||
std::cell::Cell::new((b, s)) | ||
} | ||
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// CHECK-LABEL: { i1, i1 } @make_tuple_of_bools(i1 noundef zeroext %a, i1 noundef zeroext %b) | ||
#[no_mangle] | ||
pub fn make_tuple_of_bools(a: bool, b: bool) -> (bool, bool) { | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i1, i1 } poison, i1 %a, 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i1, i1 } %[[TEMP0]], i1 %b, 1 | ||
// CHECK: ret { i1, i1 } %[[TEMP1]] | ||
(a, b) | ||
} | ||
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pub struct Struct0(); | ||
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// CHECK-LABEL: void @make_struct_0() | ||
#[no_mangle] | ||
pub fn make_struct_0() -> Struct0 { | ||
// CHECK: ret void | ||
let s = Struct0(); | ||
s | ||
} | ||
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pub struct Struct1(i32); | ||
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// CHECK-LABEL: i32 @make_struct_1(i32 noundef %a) | ||
#[no_mangle] | ||
pub fn make_struct_1(a: i32) -> Struct1 { | ||
// CHECK: ret i32 %a | ||
let s = Struct1(a); | ||
s | ||
} | ||
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pub struct Struct2Asc(i16, i64); | ||
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// CHECK-LABEL: { i64, i16 } @make_struct_2_asc(i16 noundef %a, i64 noundef %b) | ||
#[no_mangle] | ||
pub fn make_struct_2_asc(a: i16, b: i64) -> Struct2Asc { | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i64, i16 } poison, i64 %b, 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i64, i16 } %[[TEMP0]], i16 %a, 1 | ||
// CHECK: ret { i64, i16 } %[[TEMP1]] | ||
let s = Struct2Asc(a, b); | ||
s | ||
} | ||
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pub struct Struct2Desc(i64, i16); | ||
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// CHECK-LABEL: { i64, i16 } @make_struct_2_desc(i64 noundef %a, i16 noundef %b) | ||
#[no_mangle] | ||
pub fn make_struct_2_desc(a: i64, b: i16) -> Struct2Desc { | ||
// CHECK-NOT: alloca | ||
// CHECK: %[[TEMP0:.+]] = insertvalue { i64, i16 } poison, i64 %a, 0 | ||
// CHECK: %[[TEMP1:.+]] = insertvalue { i64, i16 } %[[TEMP0]], i16 %b, 1 | ||
// CHECK: ret { i64, i16 } %[[TEMP1]] | ||
let s = Struct2Desc(a, b); | ||
s | ||
} |