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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
29c294880d
Rather than producing multiple constants with the same value, fold all instances of a given constant to the same constant instruction. A future PR will use this to replace the current type canonicalization system.
53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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fn Main() {
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var x: i32 = 0;
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if (true) {
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var x: i32 = 0;
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// TODO: We should reject this use of the shadowed variable `x`.
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x = 1;
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}
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}
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// CHECK:STDOUT: --- shadowing.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: i32 = int_literal 0 [template]
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// CHECK:STDOUT: %.2: bool = bool_literal true [template]
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// CHECK:STDOUT: %.3: i32 = int_literal 1 [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace package, {.Main = %Main} [template]
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// CHECK:STDOUT: %Main: <function> = fn_decl @Main [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Main() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %x.var.loc8: ref i32 = var x
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// CHECK:STDOUT: %x.loc8: ref i32 = bind_name x, %x.var.loc8
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// CHECK:STDOUT: %.loc8: i32 = int_literal 0 [template = constants.%.1]
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// CHECK:STDOUT: assign %x.var.loc8, %.loc8
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// CHECK:STDOUT: %.loc9: bool = bool_literal true [template = constants.%.2]
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// CHECK:STDOUT: if %.loc9 br !if.then else br !if.else
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.then:
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// CHECK:STDOUT: %x.var.loc10: ref i32 = var x
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// CHECK:STDOUT: %x.loc10: ref i32 = bind_name x, %x.var.loc10
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// CHECK:STDOUT: %.loc10: i32 = int_literal 0 [template = constants.%.1]
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// CHECK:STDOUT: assign %x.var.loc10, %.loc10
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// CHECK:STDOUT: %x.ref: ref i32 = name_ref x, %x.loc10
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// CHECK:STDOUT: %.loc13: i32 = int_literal 1 [template = constants.%.3]
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// CHECK:STDOUT: assign %x.ref, %.loc13
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// CHECK:STDOUT: br !if.else
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.else:
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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