X86: correct library call setup for Windows itanium

This target is identical to the Windows MSVC (and follows Microsoft ABI for C).
Correct the library call setup for this target.  The same set of library calls
are missing on this environment.

llvm-svn: 213883

2 files changed, 17 insertions, 1 deletions

diff --git a/llvm/lib/Target/TargetLibraryInfo.cpp b/llvm/lib/Target/TargetLibraryInfo.cpp
index 6ec0b1f929c..6ff7441bbd3 100644
--- a/llvm/lib/Target/TargetLibraryInfo.cpp
+++ b/llvm/lib/Target/TargetLibraryInfo.cpp
@@ -426,7 +426,7 @@ static void initialize(TargetLibraryInfo &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc::fiprintf);
   }
 
-  if (T.isKnownWindowsMSVCEnvironment()) {
+  if (T.isKnownWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {
     // Win32 does not support long double
     TLI.setUnavailable(LibFunc::acosl);
     TLI.setUnavailable(LibFunc::asinl);
diff --git a/llvm/test/MC/X86/x86-windows-itanium-libcalls.ll b/llvm/test/MC/X86/x86-windows-itanium-libcalls.ll
new file mode 100644
index 00000000000..773d03b4def
--- /dev/null
+++ b/llvm/test/MC/X86/x86-windows-itanium-libcalls.ll
@@ -0,0 +1,16 @@
+; RUN: opt -mtriple i686-windows-itanium -O2 -o - %s | llvm-dis | FileCheck %s
+
+target triple = "i686-windows-itanium"
+
+declare dllimport double @floor(double)
+
+define dllexport float @test(float %f) {
+  %conv = fpext float %f to double
+  %call = tail call double @floor(double %conv)
+  %cast = fptrunc double %call to float
+  ret float %cast
+}
+
+; CHECK-NOT: floorf
+; CHECK: floor
+