From: Peter Collingbourne <peter@pcc.me.uk>
Date: Sat, 4 Dec 2010 01:51:14 +0000 (+0000)
Subject: Implement -cl-unsafe-math-optimizations
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5f67e13fcdc3c33e9cd5d027bfbb677b726c6f6a;p=clang

Implement -cl-unsafe-math-optimizations

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120879 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 19d3a24fcb..a7b2692101 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -603,3 +603,5 @@ def cl_single_precision_constant : Flag<"-cl-single-precision-constant">,
   HelpText<"OpenCL only. Treat double precision floating-point constant as single precision constant.">;
 def cl_finite_math_only : Flag<"-cl-finite-math-only">,
   HelpText<"OpenCL only. Allow floating-point optimizations that assume arguments and results are not NaNs or +-Inf.">;
+def cl_unsafe_math_optimizations : Flag<"-cl-unsafe-math-optimizations">,
+  HelpText<"OpenCL only. Allow unsafe floating-point optimizations.  Also implies -cl-no-signed-zeros and -cl-mad-enable">;
diff --git a/include/clang/Frontend/CodeGenOptions.h b/include/clang/Frontend/CodeGenOptions.h
index 3ca3104348..84f500383d 100644
--- a/include/clang/Frontend/CodeGenOptions.h
+++ b/include/clang/Frontend/CodeGenOptions.h
@@ -75,6 +75,7 @@ public:
   unsigned UnitAtATime       : 1; /// Unused. For mirroring GCC optimization
                                   /// selection.
   unsigned UnrollLoops       : 1; /// Control whether loops are unrolled.
+  unsigned UnsafeFPMath      : 1; /// Allow unsafe floating point optzns.
   unsigned UnwindTables      : 1; /// Emit unwind tables.
   unsigned VerifyModule      : 1; /// Control whether the module should be run
                                   /// through the LLVM Verifier.
@@ -139,6 +140,7 @@ public:
     TimePasses = 0;
     UnitAtATime = 1;
     UnrollLoops = 0;
+    UnsafeFPMath = 0;
     UnwindTables = 0;
     VerifyModule = 1;
 
diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index ad70b601c5..2808b4a350 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -186,6 +186,7 @@ bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action,
   llvm::NoInfsFPMath = CodeGenOpts.NoInfsFPMath;
   llvm::NoNaNsFPMath = CodeGenOpts.NoNaNsFPMath;
   NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
+  llvm::UnsafeFPMath = CodeGenOpts.UnsafeFPMath;
   llvm::UseSoftFloat = CodeGenOpts.SoftFloat;
   UnwindTablesMandatory = CodeGenOpts.UnwindTables;
 
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 4c8a281d1e..fd0b056eaa 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -903,6 +903,7 @@ static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
+  Opts.UnsafeFPMath = Args.hasArg(OPT_cl_unsafe_math_optimizations);
   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");