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[X86] Also create+widen FMIN/FMAX nodes for v2f32.

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This happens in the HINT benchmark, where the SLP-vectorizer created
v2f32 fcmp/select code.  The "correct" solution would have been to
teach the vectorizer cost model that v2f32 isn't legal (because really,
it isn't), but if we can vectorize we might as well do so.

We legalize these v2f32 FMIN/FMAX nodes by widening to v4f32 later on.
v3f32 were already widened to v4f32 by the generic unroll-and-build-vector
legalization.

rdar://15763436
Differential Revision: http://reviews.llvm.org/D6557


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225691 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Bougacha
2015-01-12 20:31:30 +00:00
parent c88b471b9d
commit cd5bbd8bad
2 changed files with 54 additions and 1 deletions
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36
test/CodeGen/X86/sse-minmax.ll
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@@ -989,3 +989,39 @@ define <4 x float> @test_minps(<4 x float> %x, <4 x float> %y) nounwind {
%min = select <4 x i1> %min_is_x, <4 x float> %x, <4 x float> %y
ret <4 x float> %min
}
; UNSAFE-LABEL: test_maxps_illegal_v2f32:
; UNSAFE-NEXT: maxps %xmm1, %xmm0
; UNSAFE-NEXT: ret
define <2 x float> @test_maxps_illegal_v2f32(<2 x float> %x, <2 x float> %y) nounwind {
%max_is_x = fcmp oge <2 x float> %x, %y
%max = select <2 x i1> %max_is_x, <2 x float> %x, <2 x float> %y
ret <2 x float> %max
}
; UNSAFE-LABEL: test_minps_illegal_v2f32:
; UNSAFE-NEXT: minps %xmm1, %xmm0
; UNSAFE-NEXT: ret
define <2 x float> @test_minps_illegal_v2f32(<2 x float> %x, <2 x float> %y) nounwind {
%min_is_x = fcmp ole <2 x float> %x, %y
%min = select <2 x i1> %min_is_x, <2 x float> %x, <2 x float> %y
ret <2 x float> %min
}
; UNSAFE-LABEL: test_maxps_illegal_v3f32:
; UNSAFE-NEXT: maxps %xmm1, %xmm0
; UNSAFE-NEXT: ret
define <3 x float> @test_maxps_illegal_v3f32(<3 x float> %x, <3 x float> %y) nounwind {
%max_is_x = fcmp oge <3 x float> %x, %y
%max = select <3 x i1> %max_is_x, <3 x float> %x, <3 x float> %y
ret <3 x float> %max
}
; UNSAFE-LABEL: test_minps_illegal_v3f32:
; UNSAFE-NEXT: minps %xmm1, %xmm0
; UNSAFE-NEXT: ret
define <3 x float> @test_minps_illegal_v3f32(<3 x float> %x, <3 x float> %y) nounwind {
%min_is_x = fcmp ole <3 x float> %x, %y
%min = select <3 x i1> %min_is_x, <3 x float> %x, <3 x float> %y
ret <3 x float> %min
}