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Constant evaluation support for initializing expressions. (#3624)

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The constant value we associate with an initializing representation is
the object representation that the initializing expression will store to
its destination.

Also include the type in the profile of an instruction. This is now
necessary for array values, which are represented as tuple_value
instructions with array type, to avoid instructions with different types
being merged by constant canonicalization.
This commit is contained in:
Richard Smith
2024-01-19 23:28:53 +00:00
committed by GitHub
parent a1d03b1f56
commit 87ecb34f6b
54 changed files with 588 additions and 398 deletions
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toolchain/check/testdata/array/array_vs_tuple.carbon
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// 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 G() {
// These should have two different constant values.
var a: [i32; 3] = (1, 2, 3);
var b: (i32, i32, i32) = (1, 2, 3);
}
// CHECK:STDOUT: --- array_vs_tuple.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %.1: i32 = int_literal 3 [template]
// CHECK:STDOUT: %.2: type = array_type %.1, i32 [template]
// CHECK:STDOUT: %.3: type = ptr_type [i32; 3] [template]
// CHECK:STDOUT: %.4: i32 = int_literal 1 [template]
// CHECK:STDOUT: %.5: i32 = int_literal 2 [template]
// CHECK:STDOUT: %.6: type = tuple_type (i32, i32, i32) [template]
// CHECK:STDOUT: %.7: i32 = int_literal 0 [template]
// CHECK:STDOUT: %.8: i32 = int_literal 1 [template]
// CHECK:STDOUT: %.9: i32 = int_literal 2 [template]
// CHECK:STDOUT: %.10: [i32; 3] = tuple_value (%.4, %.5, %.1) [template]
// CHECK:STDOUT: %.11: type = tuple_type (type, type, type) [template]
// CHECK:STDOUT: %.12: type = ptr_type (i32, i32, i32) [template]
// CHECK:STDOUT: %.13: (i32, i32, i32) = tuple_value (%.4, %.5, %.1) [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace package, {.G = %G} [template]
// CHECK:STDOUT: %G: <function> = fn_decl @G [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc9_16: i32 = int_literal 3 [template = constants.%.1]
// CHECK:STDOUT: %.loc9_17: type = array_type %.loc9_16, i32 [template = constants.%.2]
// CHECK:STDOUT: %a.var: ref [i32; 3] = var a
// CHECK:STDOUT: %a: ref [i32; 3] = bind_name a, %a.var
// CHECK:STDOUT: %.loc9_22: i32 = int_literal 1 [template = constants.%.4]
// CHECK:STDOUT: %.loc9_25: i32 = int_literal 2 [template = constants.%.5]
// CHECK:STDOUT: %.loc9_28: i32 = int_literal 3 [template = constants.%.1]
// CHECK:STDOUT: %.loc9_29.1: (i32, i32, i32) = tuple_literal (%.loc9_22, %.loc9_25, %.loc9_28)
// CHECK:STDOUT: %.loc9_29.2: i32 = int_literal 0 [template = constants.%.7]
// CHECK:STDOUT: %.loc9_29.3: ref i32 = array_index %a.var, %.loc9_29.2
// CHECK:STDOUT: %.loc9_29.4: init i32 = initialize_from %.loc9_22 to %.loc9_29.3 [template = constants.%.4]
// CHECK:STDOUT: %.loc9_29.5: i32 = int_literal 1 [template = constants.%.8]
// CHECK:STDOUT: %.loc9_29.6: ref i32 = array_index %a.var, %.loc9_29.5
// CHECK:STDOUT: %.loc9_29.7: init i32 = initialize_from %.loc9_25 to %.loc9_29.6 [template = constants.%.5]
// CHECK:STDOUT: %.loc9_29.8: i32 = int_literal 2 [template = constants.%.9]
// CHECK:STDOUT: %.loc9_29.9: ref i32 = array_index %a.var, %.loc9_29.8
// CHECK:STDOUT: %.loc9_29.10: init i32 = initialize_from %.loc9_28 to %.loc9_29.9 [template = constants.%.1]
// CHECK:STDOUT: %.loc9_29.11: init [i32; 3] = array_init (%.loc9_29.4, %.loc9_29.7, %.loc9_29.10) to %a.var [template = constants.%.10]
// CHECK:STDOUT: %.loc9_29.12: init [i32; 3] = converted %.loc9_29.1, %.loc9_29.11 [template = constants.%.10]
// CHECK:STDOUT: assign %a.var, %.loc9_29.12
// CHECK:STDOUT: %.loc10_24.1: (type, type, type) = tuple_literal (i32, i32, i32)
// CHECK:STDOUT: %.loc10_24.2: type = converted %.loc10_24.1, constants.%.6 [template = constants.%.6]
// CHECK:STDOUT: %b.var: ref (i32, i32, i32) = var b
// CHECK:STDOUT: %b: ref (i32, i32, i32) = bind_name b, %b.var
// CHECK:STDOUT: %.loc10_29: i32 = int_literal 1 [template = constants.%.4]
// CHECK:STDOUT: %.loc10_32: i32 = int_literal 2 [template = constants.%.5]
// CHECK:STDOUT: %.loc10_35: i32 = int_literal 3 [template = constants.%.1]
// CHECK:STDOUT: %.loc10_36.1: (i32, i32, i32) = tuple_literal (%.loc10_29, %.loc10_32, %.loc10_35)
// CHECK:STDOUT: %.loc10_36.2: ref i32 = tuple_access %b.var, element0
// CHECK:STDOUT: %.loc10_36.3: init i32 = initialize_from %.loc10_29 to %.loc10_36.2 [template = constants.%.4]
// CHECK:STDOUT: %.loc10_36.4: ref i32 = tuple_access %b.var, element1
// CHECK:STDOUT: %.loc10_36.5: init i32 = initialize_from %.loc10_32 to %.loc10_36.4 [template = constants.%.5]
// CHECK:STDOUT: %.loc10_36.6: ref i32 = tuple_access %b.var, element2
// CHECK:STDOUT: %.loc10_36.7: init i32 = initialize_from %.loc10_35 to %.loc10_36.6 [template = constants.%.1]
// CHECK:STDOUT: %.loc10_36.8: init (i32, i32, i32) = tuple_init (%.loc10_36.3, %.loc10_36.5, %.loc10_36.7) to %b.var [template = constants.%.13]
// CHECK:STDOUT: %.loc10_36.9: init (i32, i32, i32) = converted %.loc10_36.1, %.loc10_36.8 [template = constants.%.13]
// CHECK:STDOUT: assign %b.var, %.loc10_36.9
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: