--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/AMDGPU/fp-classify.ll	Tue Oct 13 17:48:58 2015 +0900
@@ -0,0 +1,131 @@
+; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+
+declare i1 @llvm.AMDGPU.class.f32(float, i32) #1
+declare i1 @llvm.AMDGPU.class.f64(double, i32) #1
+declare i32 @llvm.r600.read.tidig.x() #1
+declare float @llvm.fabs.f32(float) #1
+declare double @llvm.fabs.f64(double) #1
+
+; SI-LABEL: {{^}}test_isinf_pattern:
+; SI: v_mov_b32_e32 [[MASK:v[0-9]+]], 0x204{{$}}
+; SI: v_cmp_class_f32_e32 vcc, s{{[0-9]+}}, [[MASK]]
+; SI-NOT: v_cmp
+; SI: s_endpgm
+define void @test_isinf_pattern(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %cmp = fcmp oeq float %fabs, 0x7FF0000000000000
+  %ext = zext i1 %cmp to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; SI-LABEL: {{^}}test_not_isinf_pattern_0:
+; SI-NOT: v_cmp_class
+; SI: s_endpgm
+define void @test_not_isinf_pattern_0(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %cmp = fcmp ueq float %fabs, 0x7FF0000000000000
+  %ext = zext i1 %cmp to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; SI-LABEL: {{^}}test_not_isinf_pattern_1:
+; SI-NOT: v_cmp_class
+; SI: s_endpgm
+define void @test_not_isinf_pattern_1(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %cmp = fcmp oeq float %fabs, 0xFFF0000000000000
+  %ext = zext i1 %cmp to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; SI-LABEL: {{^}}test_isfinite_pattern_0:
+; SI-NOT: v_cmp
+; SI: v_mov_b32_e32 [[MASK:v[0-9]+]], 0x1f8{{$}}
+; SI: v_cmp_class_f32_e32 vcc, s{{[0-9]+}}, [[MASK]]
+; SI-NOT: v_cmp
+; SI: s_endpgm
+define void @test_isfinite_pattern_0(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %ord = fcmp ord float %x, 0.000000e+00
+  %x.fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %ninf = fcmp une float %x.fabs, 0x7FF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; Use negative infinity
+; SI-LABEL: {{^}}test_isfinite_not_pattern_0:
+; SI-NOT: v_cmp_class_f32
+; SI: s_endpgm
+define void @test_isfinite_not_pattern_0(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %ord = fcmp ord float %x, 0.000000e+00
+  %x.fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %ninf = fcmp une float %x.fabs, 0xFFF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; No fabs
+; SI-LABEL: {{^}}test_isfinite_not_pattern_1:
+; SI-NOT: v_cmp_class_f32
+; SI: s_endpgm
+define void @test_isfinite_not_pattern_1(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %ord = fcmp ord float %x, 0.000000e+00
+  %ninf = fcmp une float %x, 0x7FF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; fabs of different value
+; SI-LABEL: {{^}}test_isfinite_not_pattern_2:
+; SI-NOT: v_cmp_class_f32
+; SI: s_endpgm
+define void @test_isfinite_not_pattern_2(i32 addrspace(1)* nocapture %out, float %x, float %y) #0 {
+  %ord = fcmp ord float %x, 0.000000e+00
+  %x.fabs = tail call float @llvm.fabs.f32(float %y) #1
+  %ninf = fcmp une float %x.fabs, 0x7FF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; Wrong ordered compare type
+; SI-LABEL: {{^}}test_isfinite_not_pattern_3:
+; SI-NOT: v_cmp_class_f32
+; SI: s_endpgm
+define void @test_isfinite_not_pattern_3(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %ord = fcmp uno float %x, 0.000000e+00
+  %x.fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %ninf = fcmp une float %x.fabs, 0x7FF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+; Wrong unordered compare
+; SI-LABEL: {{^}}test_isfinite_not_pattern_4:
+; SI-NOT: v_cmp_class_f32
+; SI: s_endpgm
+define void @test_isfinite_not_pattern_4(i32 addrspace(1)* nocapture %out, float %x) #0 {
+  %ord = fcmp ord float %x, 0.000000e+00
+  %x.fabs = tail call float @llvm.fabs.f32(float %x) #1
+  %ninf = fcmp one float %x.fabs, 0x7FF0000000000000
+  %and = and i1 %ord, %ninf
+  %ext = zext i1 %and to i32
+  store i32 %ext, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone }