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Author SHA1 Message Date
Yaxun Liu 2c17e82bc7 [OpenCL][AMDGPU] Add support for -cl-denorms-are-zero 
Adjust target features for amdgcn target when -cl-denorms-are-zero is set.

Denormal support is controlled by feature strings fp32-denormals fp64-denormals in amdgcn target. If -cl-denorms-are-zero is not set and the command line does not set fp32/64-denormals feature string, +fp32-denormals +fp64-denormals will be on for GPU's supporting them.

A new virtual function virtual void TargetInfo::adjustTargetOptions(const CodeGenOptions &CGOpts, TargetOptions &TargetOpts) const is introduced to allow adjusting target option by codegen option.

Differential Revision: https://reviews.llvm.org/D22815

llvm-svn: 278151
 2016-08-09 19:43:38 +00:00
Tom Stellard f414fb75b0 Driver: Implement -cl-denorms-are-zero 
This is currently a no-op, which is allowed by the OpenCL specification.

llvm-svn: 216179
 2014-08-21 13:58:36 +00:00