[all-commits] [llvm/llvm-project] b76854: Revert "[InstCombine] Simplify select operand base...

[Benjamin Kramer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b768546fe0cc1d320857a6e080d4c796efb0c00c
      https://github.com/llvm/llvm-project/commit/b768546fe0cc1d320857a6e080d4c796efb0c00c
  Author: Benjamin Kramer <benny.kra at googlemail.com>
  Date:   2020-09-15 (Tue, 15 Sep 2020)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
    M llvm/test/Transforms/InstCombine/rem.ll
    M llvm/test/Transforms/InstCombine/select-binop-cmp.ll
    M llvm/test/Transforms/InstCombine/select.ll

  Log Message:
  -----------
  Revert "[InstCombine] Simplify select operand based on equality condition"

This reverts commit cfff88c03cf9e9b72906a41fd11e06721d54f293. Sends
instcombine into an infinite loop.

```
define i1 @foo(i32 %arg, i32 %arg1) {
bb:
  %tmp = udiv i32 %arg, %arg1
  %tmp2 = mul nsw i32 %tmp, %arg1
  %tmp3 = icmp eq i32 %tmp2, %arg
  %tmp4 = select i1 %tmp3, i32 %tmp, i32 undef
  %tmp5 = icmp sgt i32 %tmp4, 255
  ret i1 %tmp5
}
```