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Replace form insts with actions (#7100)

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See
[here](https://docs.google.com/document/d/1rWcueFwIfZox6GKVGxiUG4cBzjrZ6djXiIDGyJDtrE4/edit?tab=t.0)
for the design doc.

This also removes the default value of the `result_type_inst_id`
parameter of `HandleAction`, moves it before the action in the parameter
list, and documents it. This solves two problems:
- The default made it easy to forget, leading to unnecessary
`TypeOfInst` instructions.
- When it was present, putting it after the fairly "bulky" action
argument tended to make the callsite harder to read.
This commit is contained in:
Geoff Romer
2026-04-29 18:13:42 +00:00
committed by GitHub
parent 0124aae041
commit 4c9049346d
97 changed files with 1181 additions and 834 deletions
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toolchain/check/testdata/function/declaration/ref.carbon
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+6 -6
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@@ -53,14 +53,14 @@ fn G() {
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %.loc4_8.1: %pattern_type.7ce = ref_return_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.7ce = return_slot_pattern %.loc4_8.1, %i32 [concrete]
// CHECK:STDOUT: %.loc4_11.1: %pattern_type.7ce = ref_return_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.7ce = return_slot_pattern %.loc4_11.1, %i32 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %.loc4_11.1: type = ref_tag %i32
// CHECK:STDOUT: %.loc4_11.2: Core.Form = ref_form %i32 [concrete = constants.%.1da]
// CHECK:STDOUT: %.loc4_8.2: ref %i32 = ref_return
// CHECK:STDOUT: %return: ref %i32 = return_slot %.loc4_8.2
// CHECK:STDOUT: %.loc4_11.2: type = ref_tag %i32
// CHECK:STDOUT: %.loc4_11.3: Core.Form = ref_form %i32 [concrete = constants.%.1da]
// CHECK:STDOUT: %.loc4_11.4: ref %i32 = ref_return
// CHECK:STDOUT: %return: ref %i32 = return_slot %.loc4_11.4
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {} {}
// CHECK:STDOUT: }