From: Chad Rosier <mcrosier@apple.com>
Date: Wed, 29 Feb 2012 20:14:59 +0000 (+0000)
Subject: Allocate TargetLibraryInfo for the CodeGen passes.  Otherwise, it's instantiated
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3f3335dbc30fbcd71b295d248cd3d5f6d94ce3fb;p=clang

Allocate TargetLibraryInfo for the CodeGen passes.  Otherwise, it's instantiated
by the BAA pass, which uses the default TargetLibraryInfo constructor.
Unfortunately, the default TargetLibraryInfo constructor assumes all library
calls are available and thus ignores -fno-builtin.
rdar://10947759


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151745 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index d175bd5e08..d9bdc325c1 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -351,6 +351,12 @@ bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action,
   // Create the code generator passes.
   PassManager *PM = getCodeGenPasses();
 
+  // Add LibraryInfo.
+  TargetLibraryInfo *TLI = new TargetLibraryInfo();
+  if (!CodeGenOpts.SimplifyLibCalls)
+    TLI->disableAllFunctions();
+  PM->add(TLI);
+
   // Normal mode, emit a .s or .o file by running the code generator. Note,
   // this also adds codegenerator level optimization passes.
   TargetMachine::CodeGenFileType CGFT = TargetMachine::CGFT_AssemblyFile;
diff --git a/test/CodeGen/libcalls-fno-builtin.c b/test/CodeGen/libcalls-fno-builtin.c
new file mode 100644
index 0000000000..41f0b38c67
--- /dev/null
+++ b/test/CodeGen/libcalls-fno-builtin.c
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -S -O3 -fno-builtin -o - %s | FileCheck %s
+
+double ceil(double x);
+double copysign(double,double);
+double cos(double x);
+double fabs(double x);
+double floor(double x);
+
+double t1(double x) { return ceil(x); }
+// CHECK: t1
+// CHECK: ceil
+
+double t2(double x, double y) { return copysign(x,y); }
+// CHECK: t2
+// CHECK: copysign
+
+double t3(double x) { return cos(x); }
+// CHECK: t3
+// CHECK: cos
+
+double t4(double x) { return fabs(x); }
+// CHECK: t4
+// CHECK: fabs
+
+double t5(double x) { return floor(x); }
+// CHECK: t5
+// CHECK: floor