[llvm] [CodeGen] Remove ExpandInlineAsm hook (PR #156617)

[Nikita Popov via llvm-commits]

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@@ -25,16 +31,20 @@ define i32 @pen(i32 %x) nounwind {
 ; CHECK-LABEL: pen:
 ; CHECK:       ## %bb.0:
 ; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    ## InlineAsm Start
 ; CHECK-NEXT:    bswapl %eax
+; CHECK-NEXT:    ## InlineAsm End
 ; CHECK-NEXT:    retq
-	%asmtmp = tail call i32 asm "bswapl ${0:q}", "=r,0,~{dirflag},~{fpsr},~{flags}"(i32 %x) nounwind
+	%asmtmp = tail call i32 asm "bswapl ${0:k}", "=r,0,~{dirflag},~{fpsr},~{flags}"(i32 %x) nounwind
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nikic wrote:

The transform hid a bug in the inline asm string. This was using the wrong register class.

https://github.com/llvm/llvm-project/pull/156617