diff --git a/llvm/test/Transforms/Attributor/nofpclass-powi.ll b/llvm/test/Transforms/Attributor/nofpclass-powi.ll
new file mode 100644
index 0000000000000..5e6c204f2b02e
--- /dev/null
+++ b/llvm/test/Transforms/Attributor/nofpclass-powi.ll
@@ -0,0 +1,241 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
+
+declare float @llvm.powi.f32.i32(float, i32)
+declare float @llvm.powi.f32.i64(float, i64)
+
+declare <2 x float> @llvm.powi.v2f32.v2i32(<2 x float>, <2 x i32>)
+
+define float @ret_powi_f32(float %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32
+; CHECK-SAME: (float [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5:[0-9]+]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_i64(float %arg0, i64 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_i64
+; CHECK-SAME: (float [[ARG0:%.*]], i64 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i64(float [[ARG0]], i64 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i64(float %arg0, i64 %arg1)
+  ret float %call
+}
+
+define <2 x float> @ret_powi_v2f32(<2 x float> %arg0, <2 x i32> %arg1) #0 {
+; CHECK-LABEL: define <2 x float> @ret_powi_v2f32
+; CHECK-SAME: (<2 x float> [[ARG0:%.*]], <2 x i32> [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> [[ARG0]], <2 x i32> [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret <2 x float> [[CALL]]
+;
+  %call = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> %arg0, <2 x i32> %arg1)
+  ret <2 x float> %call
+}
+
+define float @ret_powi_f32_odd_constant(float %arg0) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_odd_constant
+; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 noundef 3) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 3)
+  ret float %call
+}
+
+define float @ret_powi_f32_even_constant(float %arg0) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_even_constant
+; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 noundef 4) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 4)
+  ret float %call
+}
+
+define <2 x float> @ret_powi_v2f32_even_nonsplat(<2 x float> %arg0) #0 {
+; CHECK-LABEL: define <2 x float> @ret_powi_v2f32_even_nonsplat
+; CHECK-SAME: (<2 x float> [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> [[ARG0]], <2 x i32> noundef <i32 2, i32 4>) #[[ATTR5]]
+; CHECK-NEXT:    ret <2 x float> [[CALL]]
+;
+  %call = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> %arg0, <2 x i32> <i32 2, i32 4>)
+  ret <2 x float> %call
+}
+
+define <2 x float> @ret_powi_v2f32_odd_nonsplat(<2 x float> %arg0) #0 {
+; CHECK-LABEL: define <2 x float> @ret_powi_v2f32_odd_nonsplat
+; CHECK-SAME: (<2 x float> [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> [[ARG0]], <2 x i32> noundef <i32 3, i32 4>) #[[ATTR5]]
+; CHECK-NEXT:    ret <2 x float> [[CALL]]
+;
+  %call = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> %arg0, <2 x i32> <i32 3, i32 4>)
+  ret <2 x float> %call
+}
+
+define float @ret_powi_f32_masked_to_even(float %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_masked_to_even
+; CHECK-SAME: (float [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[KNOWN_EVEN:%.*]] = and i32 [[ARG1]], -2
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[KNOWN_EVEN]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %known.even = and i32 %arg1, -2
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %known.even)
+  ret float %call
+}
+
+define float @ret_powi_f32_masked_to_even_extrabits(float %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_masked_to_even_extrabits
+; CHECK-SAME: (float [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[KNOWN_EVEN:%.*]] = and i32 [[ARG1]], -4
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[KNOWN_EVEN]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %known.even = and i32 %arg1, -4
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %known.even)
+  ret float %call
+}
+
+define <2 x float> @ret_powi_v2f32_masked_to_even(<2 x float> %arg0, <2 x i32> %arg1) #0 {
+; CHECK-LABEL: define <2 x float> @ret_powi_v2f32_masked_to_even
+; CHECK-SAME: (<2 x float> [[ARG0:%.*]], <2 x i32> [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[KNOWN_EVEN:%.*]] = and <2 x i32> [[ARG1]], <i32 -2, i32 -2>
+; CHECK-NEXT:    [[CALL:%.*]] = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> [[ARG0]], <2 x i32> [[KNOWN_EVEN]]) #[[ATTR5]]
+; CHECK-NEXT:    ret <2 x float> [[CALL]]
+;
+  %known.even = and <2 x i32> %arg1, <i32 -2, i32 -2>
+  %call = call <2 x float> @llvm.powi.v2f32.v2i32(<2 x float> %arg0, <2 x i32> %known.even)
+  ret <2 x float> %call
+}
+
+define float @ret_powi_f32_noneg(float nofpclass(ninf nsub nnorm) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_nonzero(float nofpclass(ninf nsub nnorm nzero) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_nonzero
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_nozero(float nofpclass(ninf nsub nnorm) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_nozero
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_nonzero(float nofpclass(nzero) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_nonzero
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_nopzero(float nofpclass(pzero) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_nopzero
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_ftz_daz(float nofpclass(ninf nsub nnorm) %arg0, i32 %arg1) #1 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_ftz_daz
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR2:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_nonzero_ftz_daz(float nofpclass(ninf nsub nnorm nzero) %arg0, i32 %arg1) #1 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_nonzero_ftz_daz
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR2]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_nonzero_ftpz_dapz(float nofpclass(ninf nsub nnorm nzero) %arg0, i32 %arg1) #2 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_nonzero_ftpz_dapz
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR3:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noninf_nonnorm(float nofpclass(ninf nnorm) %arg0, i32 %arg1) #0 {
+; CHECK-LABEL: define float @ret_powi_f32_noninf_nonnorm
+; CHECK-SAME: (float nofpclass(ninf nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noninf_nonnorm_ftz_daz(float nofpclass(ninf nnorm) %arg0, i32 %arg1) #1 {
+; CHECK-LABEL: define float @ret_powi_f32_noninf_nonnorm_ftz_daz
+; CHECK-SAME: (float nofpclass(ninf nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR2]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_ftz_ieee(float nofpclass(ninf nsub nnorm) %arg0, i32 %arg1) #3 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_ftz_ieee
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR4:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+define float @ret_powi_f32_noneg_nonzero_ftz_ieee(float nofpclass(ninf nsub nnorm nzero) %arg0, i32 %arg1) #3 {
+; CHECK-LABEL: define float @ret_powi_f32_noneg_nonzero_ftz_ieee
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], i32 [[ARG1:%.*]]) #[[ATTR4]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.powi.f32.i32(float [[ARG0]], i32 [[ARG1]]) #[[ATTR5]]
+; CHECK-NEXT:    ret float [[CALL]]
+;
+  %call = call float @llvm.powi.f32.i32(float %arg0, i32 %arg1)
+  ret float %call
+}
+
+attributes #0 = { "denormal-fp-math"="ieee,ieee" }
+attributes #1 = { "denormal-fp-math"="preserve-sign,preserve-sign" }
+attributes #2 = { "denormal-fp-math"="positive-zero,positive-zero" }
+attributes #3 = { "denormal-fp-math"="preserve-sign,ieee" }
+
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; TUNIT: {{.*}}