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454315178c
This is the last step in getting constant pattern matchers to allow undef elements in constant vectors. I'm adding a dedicated m_ZeroInt() function and building m_Zero() from that. In most cases, calling code can be updated to use m_ZeroInt() directly when there's no need to match pointers, but I'm leaving that efficiency optimization as a follow-up step because it's not always clear when that's ok. There are just enough icmp folds in InstSimplify that can be used for integer or pointer types, that we probably still want a generic m_Zero() for those cases. Otherwise, we could eliminate it (and possibly add a m_NullPtr() as an alias for isa<ConstantPointerNull>()). We're conservatively returning a full zero vector (zeroinitializer) in InstSimplify/InstCombine on some of these folds (see diffs in InstSimplify), but I'm not sure if that's actually necessary in all cases. We may be able to propagate an undef lane instead. One test where this happens is marked with 'TODO'. llvm-svn: 330550
189 lines
5.9 KiB
LLVM
189 lines
5.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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; This is related to https://bugs.llvm.org/show_bug.cgi?id=36682
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; All of these can be simplified to a constant true or false value.
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; * slt i32 %b, 0 -> false
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; * sgt i32 %b, -1 -> true
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define i1 @i32_cast_cmp_slt_int_0_uitofp_float(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_float(
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; CHECK-NEXT: ret i1 false
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;
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%f = uitofp i32 %i to float
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%b = bitcast float %f to i32
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%cmp = icmp slt i32 %b, 0
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_slt_int_0_uitofp_float_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_float_vec(
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; CHECK-NEXT: ret <2 x i1> zeroinitializer
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;
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%f = uitofp <2 x i32> %i to <2 x float>
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%b = bitcast <2 x float> %f to <2 x i32>
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%cmp = icmp slt <2 x i32> %b, <i32 0, i32 0>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_slt_int_0_uitofp_float_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_float_vec_undef(
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; CHECK-NEXT: ret <3 x i1> zeroinitializer
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;
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%f = uitofp <3 x i32> %i to <3 x float>
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%b = bitcast <3 x float> %f to <3 x i32>
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%cmp = icmp slt <3 x i32> %b, <i32 0, i32 undef, i32 0>
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ret <3 x i1> %cmp
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}
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define i1 @i32_cast_cmp_sgt_int_m1_uitofp_float(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_float(
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; CHECK-NEXT: ret i1 true
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;
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%f = uitofp i32 %i to float
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%b = bitcast float %f to i32
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%cmp = icmp sgt i32 %b, -1
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_float_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_float_vec(
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; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
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;
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%f = uitofp <2 x i32> %i to <2 x float>
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%b = bitcast <2 x float> %f to <2 x i32>
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%cmp = icmp sgt <2 x i32> %b, <i32 -1, i32 -1>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_float_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_float_vec_undef(
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; CHECK-NEXT: ret <3 x i1> <i1 true, i1 true, i1 true>
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;
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%f = uitofp <3 x i32> %i to <3 x float>
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%b = bitcast <3 x float> %f to <3 x i32>
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%cmp = icmp sgt <3 x i32> %b, <i32 -1, i32 undef, i32 -1>
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ret <3 x i1> %cmp
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}
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define i1 @i32_cast_cmp_slt_int_0_uitofp_double(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_double(
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; CHECK-NEXT: ret i1 false
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;
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%f = uitofp i32 %i to double
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%b = bitcast double %f to i64
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%cmp = icmp slt i64 %b, 0
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_slt_int_0_uitofp_double_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_double_vec(
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; CHECK-NEXT: ret <2 x i1> zeroinitializer
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;
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%f = uitofp <2 x i32> %i to <2 x double>
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%b = bitcast <2 x double> %f to <2 x i64>
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%cmp = icmp slt <2 x i64> %b, <i64 0, i64 0>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_slt_int_0_uitofp_double_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_double_vec_undef(
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; CHECK-NEXT: ret <3 x i1> zeroinitializer
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;
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%f = uitofp <3 x i32> %i to <3 x double>
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%b = bitcast <3 x double> %f to <3 x i64>
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%cmp = icmp slt <3 x i64> %b, <i64 0, i64 undef, i64 0>
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ret <3 x i1> %cmp
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}
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define i1 @i32_cast_cmp_sgt_int_m1_uitofp_double(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_double(
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; CHECK-NEXT: ret i1 true
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;
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%f = uitofp i32 %i to double
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%b = bitcast double %f to i64
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%cmp = icmp sgt i64 %b, -1
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_double_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_double_vec(
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; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
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;
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%f = uitofp <2 x i32> %i to <2 x double>
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%b = bitcast <2 x double> %f to <2 x i64>
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%cmp = icmp sgt <2 x i64> %b, <i64 -1, i64 -1>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_double_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_double_vec_undef(
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; CHECK-NEXT: ret <3 x i1> <i1 true, i1 true, i1 true>
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;
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%f = uitofp <3 x i32> %i to <3 x double>
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%b = bitcast <3 x double> %f to <3 x i64>
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%cmp = icmp sgt <3 x i64> %b, <i64 -1, i64 undef, i64 -1>
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ret <3 x i1> %cmp
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}
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define i1 @i32_cast_cmp_slt_int_0_uitofp_half(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_half(
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; CHECK-NEXT: ret i1 false
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;
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%f = uitofp i32 %i to half
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%b = bitcast half %f to i16
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%cmp = icmp slt i16 %b, 0
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_slt_int_0_uitofp_half_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_half_vec(
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; CHECK-NEXT: ret <2 x i1> zeroinitializer
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;
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%f = uitofp <2 x i32> %i to <2 x half>
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%b = bitcast <2 x half> %f to <2 x i16>
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%cmp = icmp slt <2 x i16> %b, <i16 0, i16 0>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_slt_int_0_uitofp_half_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_slt_int_0_uitofp_half_vec_undef(
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; CHECK-NEXT: ret <3 x i1> zeroinitializer
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;
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%f = uitofp <3 x i32> %i to <3 x half>
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%b = bitcast <3 x half> %f to <3 x i16>
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%cmp = icmp slt <3 x i16> %b, <i16 0, i16 undef, i16 0>
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ret <3 x i1> %cmp
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}
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define i1 @i32_cast_cmp_sgt_int_m1_uitofp_half(i32 %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_half(
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; CHECK-NEXT: ret i1 true
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;
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%f = uitofp i32 %i to half
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%b = bitcast half %f to i16
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%cmp = icmp sgt i16 %b, -1
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ret i1 %cmp
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}
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define <2 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_half_vec(<2 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_half_vec(
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; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
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;
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%f = uitofp <2 x i32> %i to <2 x half>
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%b = bitcast <2 x half> %f to <2 x i16>
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%cmp = icmp sgt <2 x i16> %b, <i16 -1, i16 -1>
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ret <2 x i1> %cmp
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}
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define <3 x i1> @i32_cast_cmp_sgt_int_m1_uitofp_half_vec_undef(<3 x i32> %i) {
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; CHECK-LABEL: @i32_cast_cmp_sgt_int_m1_uitofp_half_vec_undef(
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; CHECK-NEXT: ret <3 x i1> <i1 true, i1 true, i1 true>
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;
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%f = uitofp <3 x i32> %i to <3 x half>
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%b = bitcast <3 x half> %f to <3 x i16>
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%cmp = icmp sgt <3 x i16> %b, <i16 -1, i16 undef, i16 -1>
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ret <3 x i1> %cmp
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}
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