enable SDISel sincos optimization for GNU environments

- add sincos to runtime library if target triple environment is GNU
- added canCombineSinCosLibcall() which checks that sincos is in the RTL and
  if the environment is GNU then unsafe fpmath is enabled (required to
  preserve errno)
- extended sincos-opt lit test

Reviewed by: Hal Finkel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175283 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 8 deletions

diff --git a/lib/CodeGen/TargetLoweringBase.cpp b/lib/CodeGen/TargetLoweringBase.cpp
index 10aa9d684ba..f2329dc720c 100644
--- a/lib/CodeGen/TargetLoweringBase.cpp
+++ b/lib/CodeGen/TargetLoweringBase.cpp
@@ -14,6 +14,7 @@
 #include "llvm/Target/TargetLowering.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/CodeGen/Analysis.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -34,7 +35,7 @@ using namespace llvm;
 
 /// InitLibcallNames - Set default libcall names.
 ///
-static void InitLibcallNames(const char **Names) {
+static void InitLibcallNames(const char **Names, const TargetMachine &TM) {
   Names[RTLIB::SHL_I16] = "__ashlhi3";
   Names[RTLIB::SHL_I32] = "__ashlsi3";
   Names[RTLIB::SHL_I64] = "__ashldi3";
@@ -341,12 +342,20 @@ static void InitLibcallNames(const char **Names) {
   Names[RTLIB::SYNC_FETCH_AND_NAND_4] = "__sync_fetch_and_nand_4";
   Names[RTLIB::SYNC_FETCH_AND_NAND_8] = "__sync_fetch_and_nand_8";
   
-  // These are generally not available.
-  Names[RTLIB::SINCOS_F32] = 0;
-  Names[RTLIB::SINCOS_F64] = 0;
-  Names[RTLIB::SINCOS_F80] = 0;
-  Names[RTLIB::SINCOS_F128] = 0;
-  Names[RTLIB::SINCOS_PPCF128] = 0;
+  if (Triple(TM.getTargetTriple()).getEnvironment() == Triple::GNU) {
+    Names[RTLIB::SINCOS_F32] = "sincosf";
+    Names[RTLIB::SINCOS_F64] = "sincos";
+    Names[RTLIB::SINCOS_F80] = "sincosl";
+    Names[RTLIB::SINCOS_F128] = "sincosl";
+    Names[RTLIB::SINCOS_PPCF128] = "sincosl";
+  } else {
+    // These are generally not available.
+    Names[RTLIB::SINCOS_F32] = 0;
+    Names[RTLIB::SINCOS_F64] = 0;
+    Names[RTLIB::SINCOS_F80] = 0;
+    Names[RTLIB::SINCOS_F128] = 0;
+    Names[RTLIB::SINCOS_PPCF128] = 0;
+  }
 }
 
 /// InitLibcallCallingConvs - Set default libcall CallingConvs.
@@ -726,7 +735,7 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm,
   SupportJumpTables = true;
   MinimumJumpTableEntries = 4;
 
-  InitLibcallNames(LibcallRoutineNames);
+  InitLibcallNames(LibcallRoutineNames, TM);
   InitCmpLibcallCCs(CmpLibcallCCs);
   InitLibcallCallingConvs(LibcallCallingConvs);
 }