[PATCH] D72225: Align branches within 32-Byte boundary(Prefix padding)

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

Here is one failure.

  --x86-align-branch-prefix-size=0
  
      3444eca6:	64 48 8b 04 25 00 00 	mov    %fs:0x0,%rax
      3444ecad:	00 00 
      3444ecaf:	48 8d 80 60 f7 ff ff 	lea    -0x8a0(%rax),%rax
      3444ecb6:	83 78 04 00          	cmpl   $0x0,0x4(%rax)
      3444ecba:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
      3444ecc0:	0f 88 08 02 00 00    	js     3444eece
  
  --x86-align-branch-prefix-size=5
  
      3444fe66:	2e 2e 2e 2e 2e 64 48 	cs cs cs cs cs mov %fs:0x0,%rax
      3444fe6d:	8b 04 25 00 00 00 00 
      3444fe74:	48 8d 80 60 f7 ff ff 	lea    -0x8a0(%rax),%rax
      3444fe7b:	00 83 78 04 00 0f    	add    %al,0xf000478(%rbx)   ###### incorrect
      3444fe81:	88 08                	mov    %cl,(%rax)
      3444fe83:	02 00                	add    (%rax),%al
      3444fe85:	00 48 8d             	add    %cl,-0x73(%rax)
      3444fe88:	05 73 b4 44 01       	add    $0x144b473,%eax


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  https://reviews.llvm.org/D72225/new/

https://reviews.llvm.org/D72225