SuccessChanges

Summary

  1. Set the floating point status register as reserved (details)
Commit 8d7ccb37440e11552cb4a0bb989ddee5031700a4 by pengfei.wang
 Set the floating point status register as reserved
Summary: This patch sets the FPSW (X87 floating-point status register)
as a reserved physical register and fix the test failure caused by [[
https://reviews.llvm.org/D68854| D68854 ]].
Before this patch, some tests will fail because it implicit uses FPSW
without define it. Setting the FPSW as a reserved physical register will
skip liveness analysis because it is always live.
Reviewers: pengfei, craig.topper
Reviewed By: craig.topper
Subscribers: craig.topper, hiraditya, llvm-commits
Patch by LiuChen.
Differential Revision: https://reviews.llvm.org/D69784
The file was modifiedllvm/lib/Target/X86/X86RegisterInfo.cpp
The file was modifiedllvm/test/CodeGen/X86/pr34080-2.ll