[llvm-dev] [RFC][ThinLTO] llvm-dis ThinLTO summary dump format

[Charles Saternos via llvm-dev]

Hey all,

Below is the proposed format for the dump of the ThinLTO module summary in
the llvm-dis utility:

> ../build/bin/llvm-dis t.o && cat t.o.ll
; ModuleID = '2.o'
source_filename = "2.ll"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@X = constant i32 42, section "foo", align 4

@a = weak alias i32, i32* @X

define void @afun() {
  %1 = load i32, i32* @a
  ret void
}

define void @testtest() {
  tail call void @boop()
  ret void
}

declare void @boop()

; Module summary:
;  testtest (External linkage)
;    Function (2 instructions)
;    Calls: boop
;  X (External linkage)
;    Global Variable
;  afun (External linkage)
;    Function (2 instructions)
;    Refs:
;      a
;  a (Weak any linkage)
;    Alias (aliasee X)

I've implemented the above format in the llvm-dis utility, since there
currently isn't really a way of getting ThinLTO summaries in a
human-readable format.

Let me know what you think of this format, and what information you think
should be added/removed.

Thanks,
Charles
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