[x86] add tests for fmax/fmin experimental intrinsics with 'fast' FMF…

…; NFC D87391 proposes to change the lowerings for 'nnan'-only FMF. That's the minimal requirement to get good codegen for x86, but currently we have bugs hindering that output unless the full 'fast' FMF is applied. These tests provide coverage for the ideal lowerings.
llvm · Sep 10, 2020 · 1ebb31b · 1ebb31b
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diff --git a/llvm/test/CodeGen/X86/vector-reduce-fmax-fmin-fast.ll b/llvm/test/CodeGen/X86/vector-reduce-fmax-fmin-fast.ll
@@ -0,0 +1,328 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSE2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSE41
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX1
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512f,+avx512bw | FileCheck %s --check-prefix=ALL --check-prefix=AVX512 --check-prefix=AVX512BW
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512f,+avx512bw,+avx512vl | FileCheck %s --check-prefix=ALL --check-prefix=AVX512 --check-prefix=AVX512VL
+
+; These tests are identical to corresponding tests in the 'nnan' versions
+; of the files except that they use 'fast' FMF. If things are working as
+; expected, the 'nnan' codegen should be the same as 'fast'.
+
+;
+; vXf32
+;
+
+define float @test_v2f32(<2 x float> %a0) {
+; SSE2-LABEL: test_v2f32:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    shufps {{.*#+}} xmm1 = xmm1[1,1],xmm0[1,1]
+; SSE2-NEXT:    minss %xmm1, %xmm0
+; SSE2-NEXT:    retq
+;
+; SSE41-LABEL: test_v2f32:
+; SSE41:       # %bb.0:
+; SSE41-NEXT:    movshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; SSE41-NEXT:    minss %xmm1, %xmm0
+; SSE41-NEXT:    retq
+;
+; AVX-LABEL: test_v2f32:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX-NEXT:    vminss %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v2f32:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX512-NEXT:    vminss %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    retq
+  %1 = call fast float @llvm.experimental.vector.reduce.fmin.v2f32(<2 x float> %a0)
+  ret float %1
+}
+
+define float @test_v4f32(<4 x float> %a0) {
+; SSE2-LABEL: test_v4f32:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE2-NEXT:    maxps %xmm1, %xmm0
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    shufps {{.*#+}} xmm1 = xmm1[1,1],xmm0[1,1]
+; SSE2-NEXT:    maxss %xmm1, %xmm0
+; SSE2-NEXT:    retq
+;
+; SSE41-LABEL: test_v4f32:
+; SSE41:       # %bb.0:
+; SSE41-NEXT:    movaps %xmm0, %xmm1
+; SSE41-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE41-NEXT:    maxps %xmm1, %xmm0
+; SSE41-NEXT:    movshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; SSE41-NEXT:    maxss %xmm1, %xmm0
+; SSE41-NEXT:    retq
+;
+; AVX-LABEL: test_v4f32:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX-NEXT:    vmaxss %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v4f32:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX512-NEXT:    vmaxss %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    retq
+  %1 = call fast float @llvm.experimental.vector.reduce.fmax.v4f32(<4 x float> %a0)
+  ret float %1
+}
+
+define float @test_v8f32(<8 x float> %a0) {
+; SSE2-LABEL: test_v8f32:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    minps %xmm1, %xmm0
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE2-NEXT:    minps %xmm1, %xmm0
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    shufps {{.*#+}} xmm1 = xmm1[1,1],xmm0[1,1]
+; SSE2-NEXT:    minss %xmm1, %xmm0
+; SSE2-NEXT:    retq
+;
+; SSE41-LABEL: test_v8f32:
+; SSE41:       # %bb.0:
+; SSE41-NEXT:    minps %xmm1, %xmm0
+; SSE41-NEXT:    movaps %xmm0, %xmm1
+; SSE41-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE41-NEXT:    minps %xmm1, %xmm0
+; SSE41-NEXT:    movshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; SSE41-NEXT:    minss %xmm1, %xmm0
+; SSE41-NEXT:    retq
+;
+; AVX-LABEL: test_v8f32:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vminps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vminps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX-NEXT:    vminss %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vzeroupper
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v8f32:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX512-NEXT:    vminps %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vminps %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX512-NEXT:    vminss %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
+  %1 = call fast float @llvm.experimental.vector.reduce.fmin.v8f32(<8 x float> %a0)
+  ret float %1
+}
+
+define float @test_v16f32(<16 x float> %a0) {
+; SSE2-LABEL: test_v16f32:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    maxps %xmm3, %xmm1
+; SSE2-NEXT:    maxps %xmm2, %xmm0
+; SSE2-NEXT:    maxps %xmm1, %xmm0
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE2-NEXT:    maxps %xmm1, %xmm0
+; SSE2-NEXT:    movaps %xmm0, %xmm1
+; SSE2-NEXT:    shufps {{.*#+}} xmm1 = xmm1[1,1],xmm0[1,1]
+; SSE2-NEXT:    maxss %xmm1, %xmm0
+; SSE2-NEXT:    retq
+;
+; SSE41-LABEL: test_v16f32:
+; SSE41:       # %bb.0:
+; SSE41-NEXT:    maxps %xmm3, %xmm1
+; SSE41-NEXT:    maxps %xmm2, %xmm0
+; SSE41-NEXT:    maxps %xmm1, %xmm0
+; SSE41-NEXT:    movaps %xmm0, %xmm1
+; SSE41-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE41-NEXT:    maxps %xmm1, %xmm0
+; SSE41-NEXT:    movshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; SSE41-NEXT:    maxss %xmm1, %xmm0
+; SSE41-NEXT:    retq
+;
+; AVX-LABEL: test_v16f32:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmaxps %ymm1, %ymm0, %ymm0
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX-NEXT:    vmaxss %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vzeroupper
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v16f32:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vextractf64x4 $1, %zmm0, %ymm1
+; AVX512-NEXT:    vmaxps %zmm1, %zmm0, %zmm0
+; AVX512-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX512-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vmaxps %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
+; AVX512-NEXT:    vmaxss %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
+  %1 = call fast float @llvm.experimental.vector.reduce.fmax.v16f32(<16 x float> %a0)
+  ret float %1
+}
+
+;
+; vXf64
+;
+
+define double @test_v2f64(<2 x double> %a0) {
+; SSE-LABEL: test_v2f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movapd %xmm0, %xmm1
+; SSE-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT:    minsd %xmm1, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: test_v2f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vminsd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v2f64:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vminsd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    retq
+  %1 = call fast double @llvm.experimental.vector.reduce.fmin.v2f64(<2 x double> %a0)
+  ret double %1
+}
+
+define double @test_v4f64(<4 x double> %a0) {
+; SSE-LABEL: test_v4f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    maxpd %xmm1, %xmm0
+; SSE-NEXT:    movapd %xmm0, %xmm1
+; SSE-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT:    maxsd %xmm1, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: test_v4f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vmaxpd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vmaxsd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vzeroupper
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v4f64:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX512-NEXT:    vmaxpd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vmaxsd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
+  %1 = call fast double @llvm.experimental.vector.reduce.fmax.v4f64(<4 x double> %a0)
+  ret double %1
+}
+
+define double @test_v8f64(<8 x double> %a0) {
+; SSE-LABEL: test_v8f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    minpd %xmm3, %xmm1
+; SSE-NEXT:    minpd %xmm2, %xmm0
+; SSE-NEXT:    minpd %xmm1, %xmm0
+; SSE-NEXT:    movapd %xmm0, %xmm1
+; SSE-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT:    minsd %xmm1, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: test_v8f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vminpd %ymm1, %ymm0, %ymm0
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vminpd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vminsd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vzeroupper
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v8f64:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vextractf64x4 $1, %zmm0, %ymm1
+; AVX512-NEXT:    vminpd %zmm1, %zmm0, %zmm0
+; AVX512-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX512-NEXT:    vminpd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vminsd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
+  %1 = call fast double @llvm.experimental.vector.reduce.fmin.v8f64(<8 x double> %a0)
+  ret double %1
+}
+
+define double @test_v16f64(<16 x double> %a0) {
+; SSE-LABEL: test_v16f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    maxpd %xmm6, %xmm2
+; SSE-NEXT:    maxpd %xmm4, %xmm0
+; SSE-NEXT:    maxpd %xmm2, %xmm0
+; SSE-NEXT:    maxpd %xmm7, %xmm3
+; SSE-NEXT:    maxpd %xmm5, %xmm1
+; SSE-NEXT:    maxpd %xmm3, %xmm1
+; SSE-NEXT:    maxpd %xmm1, %xmm0
+; SSE-NEXT:    movapd %xmm0, %xmm1
+; SSE-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSE-NEXT:    maxsd %xmm1, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: test_v16f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmaxpd %ymm3, %ymm1, %ymm1
+; AVX-NEXT:    vmaxpd %ymm2, %ymm0, %ymm0
+; AVX-NEXT:    vmaxpd %ymm1, %ymm0, %ymm0
+; AVX-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX-NEXT:    vmaxpd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX-NEXT:    vmaxsd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    vzeroupper
+; AVX-NEXT:    retq
+;
+; AVX512-LABEL: test_v16f64:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vmaxpd %zmm1, %zmm0, %zmm0
+; AVX512-NEXT:    vextractf64x4 $1, %zmm0, %ymm1
+; AVX512-NEXT:    vmaxpd %zmm1, %zmm0, %zmm0
+; AVX512-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX512-NEXT:    vmaxpd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX512-NEXT:    vmaxsd %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
+  %1 = call fast double @llvm.experimental.vector.reduce.fmax.v16f64(<16 x double> %a0)
+  ret double %1
+}
+
+declare float @llvm.experimental.vector.reduce.fmin.v2f32(<2 x float>)
+declare float @llvm.experimental.vector.reduce.fmax.v4f32(<4 x float>)
+declare float @llvm.experimental.vector.reduce.fmin.v8f32(<8 x float>)
+declare float @llvm.experimental.vector.reduce.fmax.v16f32(<16 x float>)
+
+declare double @llvm.experimental.vector.reduce.fmin.v2f64(<2 x double>)
+declare double @llvm.experimental.vector.reduce.fmax.v4f64(<4 x double>)
+declare double @llvm.experimental.vector.reduce.fmin.v8f64(<8 x double>)
+declare double @llvm.experimental.vector.reduce.fmax.v16f64(<16 x double>)