1 ; Checks that we optimize writeonly variables and corresponding stores using llvm-lto
2 ; -stats requires asserts
5 ; RUN: opt -module-summary %s -o %t1.bc
6 ; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc
7 ; RUN: llvm-lto -thinlto-action=thinlink -o %t3.index.bc %t1.bc %t2.bc
9 ; Check that we optimize write-only variables
10 ; 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
11 ; RUN: llvm-dis %t1.imported.bc -o - | FileCheck %s --check-prefix=IMPORT
12 ; RUN: llvm-lto -thinlto-action=optimize %t1.imported.bc -o - | llvm-dis - -o - | FileCheck %s --check-prefix=OPTIMIZE
14 ; IMPORT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4, !dbg !0
15 ; IMPORT-NEXT: @gBar = internal local_unnamed_addr global i32 2, align 4, !dbg !5
16 ; IMPORT: !DICompileUnit({{.*}})
18 ; STATS: 2 module-summary-index - Number of live global variables marked write only
20 ; Check that we've optimized out variables and corresponding stores
24 ; OPTIMIZE-NEXT: %1 = tail call i32 @rand()
25 ; OPTIMIZE-NEXT: %2 = tail call i32 @rand()
26 ; OPTIMIZE-NEXT: ret i32 0
28 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
29 target triple = "x86_64-pc-linux-gnu"
31 @gBar = external global i32
33 ; Should not be counted in the stats of live write only variables since it is
34 ; dead and will be dropped anyway.
35 @gDead = internal unnamed_addr global i32 1, align 4
37 define i32 @main() local_unnamed_addr {
41 declare void @baz() local_unnamed_addr