[llvm] [DAG] visitFREEZE - always allow freezing multiple operands (PR #145939)

[Nikita Popov via llvm-commits]

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@@ -278,16 +278,22 @@ define void @freeze_buildvector_single_maybe_poison_operand(ptr %origin, ptr %ds
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
-; X86-NEXT:    vbroadcastss {{.*#+}} xmm0 = [42,42,42,42]
-; X86-NEXT:    vpinsrd $0, (%ecx), %xmm0, %xmm0
+; X86-NEXT:    vmovd {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; X86-NEXT:    movl $42, %ecx
+; X86-NEXT:    vpinsrd $1, %ecx, %xmm0, %xmm0
+; X86-NEXT:    vpinsrd $2, %ecx, %xmm0, %xmm0
+; X86-NEXT:    vpinsrd $3, %ecx, %xmm0, %xmm0
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nikic wrote:

What's the cause for this regression? Does this leave behind a freeze poison for the base vector, even though it's non-demanded?

https://github.com/llvm/llvm-project/pull/145939