Bootstrap build exhausts memory and looks fall into infinite loop on X86

[bzEq]

Use the trunk driver to bootstrap, the clang driver looks falling into infinite loop on X86.
To reproduce, use the commit 0a17bdf to build an llc and run following command

llc < sample.ll

sample.ll.txt

[llvmbot]

@llvm/issue-subscribers-backend-x86

Author: Kai Luo (bzEq)

Use the trunk driver to bootstrap, the clang driver looks falling into infinite loop on X86. To reproduce, use the commit 0a17bdf to build an `llc` and run following command ``` llc < sample.ll ``` [sample.ll.txt](https://github.com/user-attachments/files/17377449/sample.ll.txt)

[bzEq]

I believe 4647a46 is a good commit, I'm bisecting to find the first bad commit.

[bzEq]

6fd229a is the first bad commit

commit 6fd229a655f521a9f58d40c671e5cab4ea3ea87b
Author: Miguel Saldivar <miguel.saldivar@hpe.com>
Date:   Sat Oct 12 03:28:39 2024 -0700

    [X86] Invert (and X, ~(and ~Y, Z)) back into (and X, (or Y, ~Z)) (#109215)
    
    When `andn` is available, we should avoid switching `s &= ~(z & ~y);` into `s &= ~z | y;`
    
    This patch turns this assembly from:
    ```
    foo:
            not     rcx
            and     rsi, rdx
            andn    rax, rsi, rdi
            or      rcx, rdx
            and     rax, rcx
            ret
    ```
    into:
    ```
    foo:
            and     rsi, rdx
            andn    rcx, rdx, rcx
            andn    rax, rsi, rdi
            andn    rax, rcx, rax
            ret
    ```
    Fixes #108731

@Saldivarcher Could you please take a look?

[RKSimon]

Trying to reduce now

[RKSimon]

llc -mtriple=x86_64-- -mattr=+bmi

define void @PR112347(ptr %p0, ptr %p1, ptr %p2) {
  %load0 = load i32, ptr %p0, align 1
  %load1 = load i32, ptr %p1, align 4
  %not = xor i32 %load0, -1
  %top = or i32 %not, -16777204
  %mask = and i32 %load1, %top
  store i32 %mask, ptr %p2, align 4
  ret void
}

[Saldivarcher]

@RKSimon thanks for fixing this 👍