clang/test/CodeGen/fat-lto-objects.c

   1 // REQUIRES: x86-registered-target
   2
   3 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=full -ffat-lto-objects -fsplit-lto-unit -emit-llvm < %s  | FileCheck %s --check-prefixes=FULL,SPLIT
   4 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=full -ffat-lto-objects -emit-llvm < %s  | FileCheck %s --check-prefixes=FULL,SPLIT
   5
   6 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=thin -fsplit-lto-unit -ffat-lto-objects -emit-llvm < %s  | FileCheck %s --check-prefixes=THIN,SPLIT
   7 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=thin -ffat-lto-objects -emit-llvm < %s  | FileCheck %s --check-prefixes=THIN,NOSPLIT
   8
   9 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=full -ffat-lto-objects -fsplit-lto-unit -emit-obj < %s -o %t.full.split.o
  10 // RUN: llvm-readelf -S %t.full.split.o | FileCheck %s --check-prefixes=ELF
  11 // RUN: llvm-objcopy --dump-section=.llvm.lto=%t.full.split.bc %t.full.split.o
  12 // RUN: llvm-dis %t.full.split.bc -o - | FileCheck %s --check-prefixes=FULL,SPLIT,NOUNIFIED
  13
  14 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=full -ffat-lto-objects -emit-obj < %s -o %t.full.nosplit.o
  15 // RUN: llvm-readelf -S %t.full.nosplit.o | FileCheck %s --check-prefixes=ELF
  16 // RUN: llvm-objcopy --dump-section=.llvm.lto=%t.full.nosplit.bc %t.full.nosplit.o
  17 // RUN: llvm-dis %t.full.nosplit.bc -o - | FileCheck %s --check-prefixes=FULL,NOSPLIT,NOUNIFIED
  18
  19 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=thin -fsplit-lto-unit -ffat-lto-objects -emit-obj < %s -o %t.thin.split.o
  20 // RUN: llvm-readelf -S %t.thin.split.o | FileCheck %s --check-prefixes=ELF
  21 // RUN: llvm-objcopy --dump-section=.llvm.lto=%t.thin.split.bc %t.thin.split.o
  22 // RUN: llvm-dis %t.thin.split.bc -o - | FileCheck %s --check-prefixes=THIN,SPLIT,NOUNIFIED
  23
  24 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=thin -ffat-lto-objects -emit-obj < %s -o %t.thin.nosplit.o
  25 // RUN: llvm-readelf -S %t.thin.nosplit.o | FileCheck %s --check-prefixes=ELF
  26 // RUN: llvm-objcopy --dump-section=.llvm.lto=%t.thin.nosplit.bc %t.thin.nosplit.o
  27 // RUN: llvm-dis %t.thin.nosplit.bc -o -  | FileCheck %s --check-prefixes=THIN,NOSPLIT,NOUNIFIED
  28
  29 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=thin -funified-lto -ffat-lto-objects -emit-obj < %s -o %t.unified.o
  30 // RUN: llvm-readelf -S %t.unified.o | FileCheck %s --check-prefixes=ELF
  31 // RUN: llvm-objcopy --dump-section=.llvm.lto=%t.unified.bc %t.unified.o
  32 // RUN: llvm-dis %t.unified.bc -o - | FileCheck %s --check-prefixes=THIN,NOSPLIT,UNIFIED
  33
  34 // RUN: %clang -cc1 -triple x86_64-unknown-linux-gnu -flto=full -ffat-lto-objects -fsplit-lto-unit -S < %s -o - \
  35 // RUN: | FileCheck %s --check-prefixes=ASM
  36
  37 /// Check that the ThinLTO metadata is only set false for full LTO.
  38 // FULL: ![[#]] = !{i32 1, !"ThinLTO", i32 0}
  39 // THIN-NOT: ![[#]] = !{i32 1, !"ThinLTO", i32 0}
  40
  41 /// Be sure we enable split LTO units correctly under -ffat-lto-objects.
  42 // SPLIT: ![[#]] = !{i32 1, !"EnableSplitLTOUnit", i32 1}
  43 // NOSPLIT: ![[#]] = !{i32 1, !"EnableSplitLTOUnit", i32 0}
  44
  45 // UNIFIED: ![[#]] = !{i32 1, !"UnifiedLTO", i32 1}
  46 // NOUNIFIED-NOT: ![[#]] = !{i32 1, !"UnifiedLTO", i32 1}
  47
  48 // ELF: .llvm.lto
  49
  50 //      ASM: .section        .llvm.lto,"e",@progbits
  51 // ASM-NEXT: .Lllvm.embedded.object:
  52 // ASM-NEXT:        .asciz  "BC
  53 // ASM-NEXT: .size   .Lllvm.embedded.object
  54
  55 int test(void) {
  56   return 0xabcd;
  57 }