diff options
| author | Tim Shen <timshen91@gmail.com> | 2018-03-30 17:51:03 +0000 |
|---|---|---|
| committer | Tim Shen <timshen91@gmail.com> | 2018-03-30 17:51:03 +0000 |
| commit | 844d7995bb8d5f14706e25b1a33066e00664c2c4 (patch) | |
| tree | e732aca8a806e72cf6e8803ae4fc77799f85d133 /llvm/lib/Target/NVPTX | |
| parent | 615e08a67bd48c3df3e08b69364a03164e69fa8f (diff) | |
[NVPTX] Enable StructuredCFG for NVPTX
Summary:
Make NVPTX require structured CFG. Added a temporary flag to
"roll back" the behavior for easy deployment.
Combined with D45008, this fixes several internal Nvidia GPU test
failures that we suspect to be ptxas miscompiles (PR27738).
Reviewers: jlebar
Subscribers: jholewinski, sanjoy, llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D45070
Diffstat (limited to 'llvm/lib/Target/NVPTX')
| -rw-r--r-- | llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp index 50c3e279f3a..741fcfb37e7 100644 --- a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp +++ b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp @@ -44,6 +44,14 @@ static cl::opt<bool> cl::desc("Disable load/store vectorizer"), cl::init(false), cl::Hidden); +// TODO: Remove this flag when we are confident with no regressions. +static cl::opt<bool> DisableRequireStructuredCFG( + "disable-nvptx-require-structured-cfg", + cl::desc("Transitional flag to turn off NVPTX's requirement on preserving " + "structured CFG. The requirement should be disabled only when " + "unexpected regressions happen."), + cl::init(false), cl::Hidden); + namespace llvm { void initializeNVVMIntrRangePass(PassRegistry&); @@ -108,6 +116,8 @@ NVPTXTargetMachine::NVPTXTargetMachine(const Target &T, const Triple &TT, drvInterface = NVPTX::NVCL; else drvInterface = NVPTX::CUDA; + if (!DisableRequireStructuredCFG) + setRequiresStructuredCFG(true); initAsmInfo(); } |