mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
1b84262428
It looks like this isn't necessary (in any tests I've done, it results in the global being described with no location or value in the imported side - while it's still fully described in the place it's imported from) & results in significant/pathological debug info growth to home these location-less global variable descriptions on the import side. This is a rather pressing/important issue to address - this regressed executable size for one example I'm looking at by 15%, object size is probably similar though I haven't measured it, and a 22x increase in the number of CUs in the cu_index in split DWARF DWP files, creating a similarly large regression in the time it takes llvm-symbolizer to run on such binaries. Reviewers: tejohnson, evgeny777 Differential Revision: https://reviews.llvm.org/D55309 llvm-svn: 348416
60 lines
2.2 KiB
LLVM
60 lines
2.2 KiB
LLVM
; Check constant propagation in thinlto combined summary. This allows us to do 2 things:
|
|
; 1. Internalize global definition which is not used externally if all accesses to it are read-only
|
|
; 2. Make a local copy of internal definition if all accesses to it are readonly. This allows constant
|
|
; folding it during optimziation phase.
|
|
; RUN: opt -module-summary %s -o %t1.bc
|
|
; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc
|
|
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
|
|
; RUN: -r=%t2.bc,foo,pl \
|
|
; RUN: -r=%t2.bc,bar,pl \
|
|
; RUN: -r=%t2.bc,baz,pl \
|
|
; RUN: -r=%t2.bc,rand, \
|
|
; RUN: -r=%t2.bc,gBar,pl \
|
|
; RUN: -r=%t1.bc,main,plx \
|
|
; RUN: -r=%t1.bc,foo, \
|
|
; RUN: -r=%t1.bc,bar, \
|
|
; RUN: -r=%t1.bc,gBar, \
|
|
; RUN: -o %t3
|
|
; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT
|
|
; RUN: llvm-dis %t3.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN
|
|
|
|
; Now check that we won't internalize global (gBar) if it's externally referenced
|
|
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
|
|
; RUN: -r=%t2.bc,foo,pl \
|
|
; RUN: -r=%t2.bc,bar,pl \
|
|
; RUN: -r=%t2.bc,baz,pl \
|
|
; RUN: -r=%t2.bc,rand, \
|
|
; RUN: -r=%t2.bc,gBar,plx \
|
|
; RUN: -r=%t1.bc,main,plx \
|
|
; RUN: -r=%t1.bc,foo, \
|
|
; RUN: -r=%t1.bc,bar, \
|
|
; RUN: -r=%t1.bc,gBar, \
|
|
; RUN: -o %t3
|
|
; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT2
|
|
|
|
; IMPORT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4
|
|
; IMPORT-NEXT: @gBar = internal local_unnamed_addr global i32 2, align 4
|
|
; IMPORT: !DICompileUnit({{.*}})
|
|
|
|
; CODEGEN: i32 @main()
|
|
; CODEGEN-NEXT: ret i32 3
|
|
|
|
; IMPORT2: @gBar = available_externally dso_local local_unnamed_addr global i32 2, align 4
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-pc-linux-gnu"
|
|
|
|
; We should be able to link external definition of gBar to its declaration
|
|
@gBar = external global i32
|
|
|
|
define i32 @main() local_unnamed_addr {
|
|
%call = tail call i32 bitcast (i32 (...)* @foo to i32 ()*)()
|
|
%call1 = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)()
|
|
%add = add nsw i32 %call1, %call
|
|
ret i32 %add
|
|
}
|
|
|
|
declare i32 @foo(...) local_unnamed_addr
|
|
|
|
declare i32 @bar(...) local_unnamed_addr
|