PTX: Fix various codegen issues

- Emit mad instead of mad.rn for shader model 1.0
- Emit explicit mov.u32 instructions for reading global variables
- (most PTX instructions cannot take global variable immediates)

llvm-svn: 127895
7 files changed
tree: 639f605b70b18c0768ffd6e90cb28b11dde5341b
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. lldb/
  6. llvm/