1; Test to ensure that the Enable Split LTO Unit flag is set properly in the 2; summary, and that we correctly silently handle linking bitcode files with 3; different values of this flag. 4 5; Linking bitcode both with EnableSplitLTOUnit set should work 6; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t1 %s 7; RUN: llvm-bcanalyzer -dump %t1 | FileCheck %s --check-prefix=SPLITLTOUNIT 8; RUN: llvm-dis -o - %t1 | FileCheck %s --check-prefix=ENABLESPLITFLAG 9; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t2 %s 10; RUN: llvm-bcanalyzer -dump %t2 | FileCheck %s --check-prefix=SPLITLTOUNIT 11; RUN: llvm-dis -o - %t2 | FileCheck %s --check-prefix=ENABLESPLITFLAG 12; RUN: llvm-lto2 run -o %t3 %t1 %t2 13 14; Linking bitcode both without EnableSplitLTOUnit set should work 15; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t1 %s 16; RUN: llvm-bcanalyzer -dump %t1 | FileCheck %s --check-prefix=NOSPLITLTOUNIT 17; RUN: llvm-dis -o - %t1 | FileCheck %s --check-prefix=NOENABLESPLITFLAG 18; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t2 %s 19; RUN: llvm-bcanalyzer -dump %t2 | FileCheck %s --check-prefix=NOSPLITLTOUNIT 20; RUN: llvm-dis -o - %t2 | FileCheck %s --check-prefix=NOENABLESPLITFLAG 21; RUN: llvm-lto2 run -o %t3 %t1 %t2 22 23; Linking bitcode with different values of EnableSplitLTOUnit should succeed 24; (silently skipping any optimizations like whole program devirt that rely 25; on all modules being split). 26; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t1 %s 27; RUN: llvm-bcanalyzer -dump %t1 | FileCheck %s --check-prefix=SPLITLTOUNIT 28; RUN: llvm-dis -o - %t1 | FileCheck %s --check-prefix=ENABLESPLITFLAG 29; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t2 %s 30; RUN: llvm-bcanalyzer -dump %t2 | FileCheck %s --check-prefix=NOSPLITLTOUNIT 31; RUN: llvm-dis -o - %t2 | FileCheck %s --check-prefix=NOENABLESPLITFLAG 32; RUN: llvm-lto2 run -o %t3 %t1 %t2 33 34; Linking bitcode with different values of EnableSplitLTOUnit (reverse order) 35; should succeed (silently skipping any optimizations like whole program devirt 36; that rely on all modules being split). 37; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t1 %s 38; RUN: llvm-bcanalyzer -dump %t1 | FileCheck %s --check-prefix=NOSPLITLTOUNIT 39; RUN: llvm-dis -o - %t1 | FileCheck %s --check-prefix=NOENABLESPLITFLAG 40; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t2 %s 41; RUN: llvm-bcanalyzer -dump %t2 | FileCheck %s --check-prefix=SPLITLTOUNIT 42; RUN: llvm-dis -o - %t2 | FileCheck %s --check-prefix=ENABLESPLITFLAG 43; RUN: llvm-lto2 run -o %t3 %t1 %t2 44 45; The flag should be set when splitting is disabled (for backwards compatibility 46; with older bitcode where it was always enabled). 47; SPLITLTOUNIT: <FLAGS op0=8/> 48; NOSPLITLTOUNIT: <FLAGS op0=0/> 49 50; Check that the corresponding module flag is set when expected. 51; ENABLESPLITFLAG: !{i32 1, !"EnableSplitLTOUnit", i32 1} 52; NOENABLESPLITFLAG-NOT: !{i32 1, !"EnableSplitLTOUnit", i32 1} 53 54target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 55target triple = "x86_64-unknown-linux-gnu" 56