[llvm] [X86] Improve lowering of i32/i64 minmax reductions (PR #197578)

[Simon Pilgrim via llvm-commits]

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@@ -70,62 +70,37 @@ define i64 @test_v2i64(<2 x i64> %a0) nounwind {
 ; X86-SSE41-NEXT:    pextrd $1, %xmm2, %edx
 ; X86-SSE41-NEXT:    retl
 ;
-; X64-SSE41-LABEL: test_v2i64:
-; X64-SSE41:       # %bb.0:
-; X64-SSE41-NEXT:    movdqa %xmm0, %xmm1
-; X64-SSE41-NEXT:    movdqa {{.*#+}} xmm0 = [9223372039002259456,9223372039002259456]
-; X64-SSE41-NEXT:    movdqa %xmm1, %xmm2
-; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
-; X64-SSE41-NEXT:    pshufd {{.*#+}} xmm3 = xmm1[2,3,2,3]
-; X64-SSE41-NEXT:    pxor %xmm3, %xmm0
-; X64-SSE41-NEXT:    movdqa %xmm0, %xmm4
-; X64-SSE41-NEXT:    pcmpgtd %xmm2, %xmm4
-; X64-SSE41-NEXT:    pmovsxdq %xmm4, %xmm5
-; X64-SSE41-NEXT:    pcmpeqd %xmm2, %xmm0
-; X64-SSE41-NEXT:    pshufd {{.*#+}} xmm2 = xmm0[1,1,3,3]
-; X64-SSE41-NEXT:    pand %xmm5, %xmm2
-; X64-SSE41-NEXT:    pshufd {{.*#+}} xmm0 = xmm4[1,1,3,3]
-; X64-SSE41-NEXT:    por %xmm2, %xmm0
-; X64-SSE41-NEXT:    blendvpd %xmm0, %xmm1, %xmm3
-; X64-SSE41-NEXT:    movq %xmm3, %rax
-; X64-SSE41-NEXT:    retq
+; X64-SSE4-LABEL: test_v2i64:
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RKSimon wrote:

@phoebewang  Pushed the change now - can you confirm you're still happy with it?

https://github.com/llvm/llvm-project/pull/197578