Add support for -fno-builtin to LTO and ThinLTO to libLTO

Reviewers: tejohnson, pcc

Subscribers: Prazek, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D30791

llvm-svn: 298936

1 files changed, 46 insertions, 0 deletions

diff --git a/llvm/test/ThinLTO/X86/tli-nobuiltin.ll b/llvm/test/ThinLTO/X86/tli-nobuiltin.ll
new file mode 100644
index 00000000000..9a480cba115
--- /dev/null
+++ b/llvm/test/ThinLTO/X86/tli-nobuiltin.ll
@@ -0,0 +1,46 @@
+; Test -lto-freestanding option for libLTO.
+; RUN: llvm-as < %s > %t.bc
+
+; Regular run: expects fprintf to be turned into fwrite
+; RUN: llvm-lto %t.bc -exported-symbol=_foo -o %t.o
+; RUN: llvm-nm %t.o | FileCheck %s --check-prefix=LTO
+; LTO: fwrite
+
+; Freestanding run: expects fprintf to NOT be turned into fwrite
+; RUN: llvm-lto %t.bc -lto-freestanding -exported-symbol=_foo -o %t.o
+; RUN: llvm-nm %t.o | FileCheck %s --check-prefix=LTO-FREESTANDING
+; LTO-FREESTANDING: fprintf
+
+; Same with ThinLTO now.
+; RUN: opt -module-hash -module-summary %s -o %t.bc
+
+; Regular run: expects fprintf to be turned into fwrite
+; RUN: llvm-lto -exported-symbol=_foo -thinlto-action=run %t.bc
+; RUN: llvm-nm %t.bc.thinlto.o | FileCheck %s --check-prefix=ThinLTO
+; ThinLTO: fwrite
+
+; Freestanding run: expects fprintf to NOT be turned into fwrite
+; RUN: llvm-lto -lto-freestanding -exported-symbol=_foo -thinlto-action=run %t.bc
+; RUN: llvm-nm %t.bc.thinlto.o | FileCheck %s --check-prefix=ThinLTO-FREESTANDING
+; ThinLTO-FREESTANDING: fprintf
+
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+declare i32 @fprintf(%FILE*, i8*, ...)
+
+%FILE = type { }
+
+@hello_world = constant [13 x i8] c"hello world\0A\00"
+@percent_s = constant [3 x i8] c"%s\00"
+
+; Check fprintf(fp, "%s", str) -> fwrite(str, fp) only when builtins are enabled
+
+define void @foo(%FILE* %fp) {
+  %fmt = getelementptr [3 x i8], [3 x i8]* @percent_s, i32 0, i32 0
+  %str = getelementptr [13 x i8], [13 x i8]* @hello_world, i32 0, i32 0
+  call i32 (%FILE*, i8*, ...) @fprintf(%FILE* %fp, i8* %fmt, i8* %str)
+  ret void
+}
+