mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-11-15 20:28:12 +00:00
Richard Smith
428d11323a
If the initializing representation is the same as the value representation, don't materialize a temporary and perform a value binding. Instead, directly extract the value, using a new `value_of_initializer` node. This removes a lot of redundant `alloca`s from our generated LLVM IR.
40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
// AUTOUPDATE
|
|
|
|
fn F() -> i32 { return 1; }
|
|
fn G() -> i32 { return 2; }
|
|
|
|
fn Select(b: bool) -> i32 {
|
|
return if b then F() else G();
|
|
}
|
|
|
|
// CHECK:STDOUT: ; ModuleID = 'basic.carbon'
|
|
// CHECK:STDOUT: source_filename = "basic.carbon"
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: define i32 @F() {
|
|
// CHECK:STDOUT: ret i32 1
|
|
// CHECK:STDOUT: }
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: define i32 @G() {
|
|
// CHECK:STDOUT: ret i32 2
|
|
// CHECK:STDOUT: }
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: define i32 @Select(i1 %b) {
|
|
// CHECK:STDOUT: br i1 %b, label %1, label %2
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: 1: ; preds = %0
|
|
// CHECK:STDOUT: %F = call i32 @F()
|
|
// CHECK:STDOUT: br label %3
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: 2: ; preds = %0
|
|
// CHECK:STDOUT: %G = call i32 @G()
|
|
// CHECK:STDOUT: br label %3
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: 3: ; preds = %2, %1
|
|
// CHECK:STDOUT: %4 = phi i32 [ %F, %1 ], [ %G, %2 ]
|
|
// CHECK:STDOUT: ret i32 %4
|
|
// CHECK:STDOUT: }
|