clang/test/CodeGen/thinlto-loop-vectorize-pm.c

   1 // REQUIRES: x86-registered-target
   2 // RUN: %clang_cc1 -o %t.o -O2 -flto=thin -triple x86_64-unknown-linux-gnu -emit-llvm-bc %s
   3 // RUN: llvm-lto -thinlto -o %t %t.o
   4
   5 // Test to ensure the loop vectorize codegen option is passed down to the
   6 // ThinLTO backend. -vectorize-loops is a cc1 option and will be added
   7 // automatically when O2/O3/Os is available for clang. Also check that
   8 // "-mllvm -vectorize-loops=false" will disable loop vectorization, overriding
   9 // the cc1 option.
  10 //
  11 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O2 -vectorize-loops -mllvm -force-vector-width=2 -mllvm -force-vector-interleave=1 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O2-LPV
  12 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O2 -vectorize-loops -mllvm -vectorize-loops=false -mllvm -force-vector-width=2 -mllvm -force-vector-interleave=1 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O2-NOLPV
  13 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O0 -vectorize-loops -mllvm -force-vector-width=2 -mllvm -force-vector-interleave=1 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O0-LPV
  14 // O2-LPV: = !{!"llvm.loop.isvectorized", i32 1}
  15 // O2-NOLPV-NOT: = !{!"llvm.loop.isvectorized", i32 1}
  16 // O0-LPV-NOT: = !{!"llvm.loop.isvectorized", i32 1}
  17
  18 // Test to ensure the loop interleave codegen option is passed down to the
  19 // ThinLTO backend. The internal loop interleave codegen option will be
  20 // enabled automatically when O2/O3 is available for clang. Also check that
  21 // "-mllvm -interleave-loops=false" will disable the interleaving, overriding
  22 // the cc1 option.
  23 //
  24 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O2 -vectorize-loops -mllvm -force-vector-width=2 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O2-InterLeave
  25 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O2 -vectorize-loops -mllvm -interleave-loops=false -mllvm -force-vector-width=2 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O2-NoInterLeave
  26 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O0 -vectorize-loops -mllvm -force-vector-width=2 -emit-llvm -o - -x ir %t.o -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s --check-prefix=O0-InterLeave
  27 // O2-InterLeave-COUNT-2: store <2 x double>
  28 // O2-InterLeave: = !{!"llvm.loop.isvectorized", i32 1}
  29 // O2-NoInterLeave-COUNT-1: store <2 x double>
  30 // O2-NoInterLeave-NOT: store <2 x double>
  31 // O2-NoInterLeave: = !{!"llvm.loop.isvectorized", i32 1}
  32 // O0-InterLeave-NOT: = !{!"llvm.loop.isvectorized", i32 1}
  33
  34 void foo(double *a) {
  35   for (int i = 0; i < 1000; i++)
  36     a[i] = 10;
  37 }