mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
673715d427
The order of global variables is generated in the order of recursively materializing variables if the global variable has the attribute of hasLocalLinkage or hasLinkOnceLinkage during the module merging. In practice, it is often the exact reverse of source order. This new order may cause performance regression. The change is to preserve the original lexical order for global variables. Reviewed By: jdoerfert, dexonsmith Differential Revision: https://reviews.llvm.org/D94202
49 lines
2.2 KiB
LLVM
49 lines
2.2 KiB
LLVM
; Checks that we optimize writeonly variables and corresponding stores using llvm-lto
|
|
; -stats requires asserts
|
|
; REQUIRES: asserts
|
|
|
|
; RUN: opt -module-summary %s -o %t1.bc
|
|
; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc
|
|
; RUN: llvm-lto -thinlto-action=thinlink -o %t3.index.bc %t1.bc %t2.bc
|
|
|
|
; Check that we optimize write-only variables
|
|
; RUN: llvm-lto -thinlto-action=import -exported-symbol=main %t1.bc -thinlto-index=%t3.index.bc -o %t1.imported.bc -stats 2>&1 | FileCheck %s --check-prefix=STATS
|
|
; RUN: llvm-dis %t1.imported.bc -o - | FileCheck %s --check-prefix=IMPORT
|
|
; RUN: llvm-lto -thinlto-action=optimize %t1.imported.bc -o - | llvm-dis - -o - | FileCheck %s --check-prefix=OPTIMIZE
|
|
|
|
; IMPORT: @gBar = internal local_unnamed_addr global i32 0, align 4, !dbg !0
|
|
; IMPORT-NEXT: @gFoo.llvm.0 = internal unnamed_addr global i32 0, align 4, !dbg !5
|
|
; IMPORT: !DICompileUnit({{.*}})
|
|
|
|
; STATS: 2 module-summary-index - Number of live global variables marked write only
|
|
|
|
; Check that we've optimized out variables and corresponding stores
|
|
; OPTIMIZE-NOT: gFoo
|
|
; OPTIMIZE-NOT: gBar
|
|
; OPTIMIZE: i32 @main
|
|
; OPTIMIZE-NEXT: %1 = tail call i32 @rand()
|
|
; OPTIMIZE-NEXT: %2 = tail call i32 @rand()
|
|
; OPTIMIZE-NEXT: ret i32 0
|
|
|
|
; Confirm that with -propagate-attrs=false we no longer do write-only importing
|
|
; RUN: llvm-lto -propagate-attrs=false -thinlto-action=import -exported-symbol=main %t1.bc -thinlto-index=%t3.index.bc -o %t1.imported.bc -stats 2>&1 | FileCheck %s --check-prefix=STATS-NOPROP
|
|
; RUN: llvm-dis %t1.imported.bc -o - | FileCheck %s --check-prefix=IMPORT-NOPROP
|
|
; STATS-NOPROP-NOT: Number of live global variables marked write only
|
|
; IMPORT-NOPROP: @gBar = available_externally
|
|
; IMPORT-NOPROP-NEXT: @gFoo.llvm.0 = available_externally
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-pc-linux-gnu"
|
|
|
|
@gBar = external global i32
|
|
|
|
; Should not be counted in the stats of live write only variables since it is
|
|
; dead and will be dropped anyway.
|
|
@gDead = internal unnamed_addr global i32 1, align 4
|
|
|
|
define i32 @main() local_unnamed_addr {
|
|
tail call void @baz()
|
|
ret i32 0
|
|
}
|
|
declare void @baz() local_unnamed_addr
|