Craig Topper 4b9bffa31e [X86] Clzero intrinsic and its addition under znver1
This patch does the following.

1. Adds an Intrinsic int_x86_clzero which works with __builtin_ia32_clzero
2. Identifies clzero feature using cpuid info. (Function:8000_0008, Checks if EBX[0]=1)
3. Adds the clzero feature under znver1 architecture.
4. The custom inserter is added in Lowering.
5. A testcase is added to check the intrinsic.
6. The clzero instruction is added to assembler test.

Patch by Ganesh Gopalasubramanian with a couple formatting tweaks, a disassembler test, and using update_llc_test.py from me.

Differential revision: https://reviews.llvm.org/D29385

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294558 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-09 04:27:34 +00:00
..
2017-01-27 18:02:53 +00:00
2014-03-20 06:45:10 +00:00