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llvm-project/llvm/test/Transforms/LoopVectorize/epilog-iv-select-cmp.ll
Florian Hahn 89ae085859
[VPlan] Remove VPVectorPointer for part 0 after unrolling. (#149735) 
VPVectorPointer for part 0 is just the pointer operand. Simplify it
after unrolling. This removes a large number of redundant GEPs with
index 0.

PR: https://github.com/llvm/llvm-project/pull/149735
2025-07-27 13:53:26 +01:00

319 lines
22 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -passes=loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -epilogue-vectorization-force-VF=4 -S < %s | FileCheck %s
define i64 @select_icmp_const(ptr %a, i64 %n) {
; CHECK-LABEL: define i64 @select_icmp_const(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ITER_CHECK:.*]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK: [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i64> [ splat (i64 -9223372036854775808), %[[VECTOR_PH]] ], [ [[TMP4:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP0]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i64>, ptr [[TMP1]], align 8
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq <4 x i64> [[WIDE_LOAD]], splat (i64 3)
; CHECK-NEXT: [[TMP4]] = select <4 x i1> [[TMP3]], <4 x i64> [[VEC_IND]], <4 x i64> [[VEC_PHI]]
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[TMP0]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i64> [[VEC_IND]], splat (i64 4)
; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP6:%.*]] = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> [[TMP4]])
; CHECK-NEXT: [[RDX_SELECT_CMP:%.*]] = icmp ne i64 [[TMP6]], -9223372036854775808
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[RDX_SELECT_CMP]], i64 [[TMP6]], i64 3
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK: [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[N]], [[N_VEC]]
; CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 4
; CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]]
; CHECK: [[VEC_EPILOG_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX1:%.*]] = phi i64 [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 3, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[BC_MERGE_RDX1]], 3
; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = select i1 [[TMP14]], i64 -9223372036854775808, i64 [[BC_MERGE_RDX1]]
; CHECK-NEXT: [[N_MOD_VF2:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT: [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <4 x i64> poison, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <4 x i64> [[DOTSPLATINSERT]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT8:%.*]] = insertelement <4 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT: [[DOTSPLAT9:%.*]] = shufflevector <4 x i64> [[DOTSPLATINSERT8]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i64> [[DOTSPLAT9]], <i64 0, i64 1, i64 2, i64 3>
; CHECK-NEXT: br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK: [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT: [[TMP7:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT9:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND5:%.*]] = phi <4 x i64> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI7:%.*]] = phi <4 x i64> [ [[DOTSPLAT]], %[[VEC_EPILOG_PH]] ], [ [[TMP11:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP7]]
; CHECK-NEXT: [[WIDE_LOAD8:%.*]] = load <4 x i64>, ptr [[TMP8]], align 8
; CHECK-NEXT: [[TMP10:%.*]] = icmp eq <4 x i64> [[WIDE_LOAD8]], splat (i64 3)
; CHECK-NEXT: [[TMP11]] = select <4 x i1> [[TMP10]], <4 x i64> [[VEC_IND5]], <4 x i64> [[VEC_PHI7]]
; CHECK-NEXT: [[INDEX_NEXT9]] = add nuw i64 [[TMP7]], 4
; CHECK-NEXT: [[VEC_IND_NEXT6]] = add <4 x i64> [[VEC_IND5]], splat (i64 4)
; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT9]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[TMP12]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP13:%.*]] = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> [[TMP11]])
; CHECK-NEXT: [[RDX_SELECT_CMP10:%.*]] = icmp ne i64 [[TMP13]], -9223372036854775808
; CHECK-NEXT: [[RDX_SELECT11:%.*]] = select i1 [[RDX_SELECT_CMP10]], i64 [[TMP13]], i64 3
; CHECK-NEXT: [[CMP_N12:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[CMP_N12]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK: [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL15:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX16:%.*]] = phi i64 [ [[RDX_SELECT11]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 3, %[[ITER_CHECK]] ]
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL15]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[RDX:%.*]] = phi i64 [ [[BC_MERGE_RDX16]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SEL:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load i64, ptr [[GEP]], align 8
; CHECK-NEXT: [[C:%.*]] = icmp eq i64 [[L]], 3
; CHECK-NEXT: [[SEL]] = select i1 [[C]], i64 [[IV]], i64 [[RDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i64 [ [[SEL]], %[[LOOP]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ], [ [[RDX_SELECT11]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i64 [[SEL_LCSSA]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%rdx = phi i64 [ 3, %entry ], [ %sel, %loop ]
%gep = getelementptr inbounds i64, ptr %a, i64 %iv
%l = load i64, ptr %gep, align 8
%c = icmp eq i64 %l, 3
%sel = select i1 %c, i64 %iv, i64 %rdx
%iv.next = add nuw nsw i64 %iv, 1
%ec = icmp eq i64 %iv.next, %n
br i1 %ec, label %exit, label %loop
exit:
ret i64 %sel
}
define i64 @select_fcmp_const_fast(ptr %a, i64 %n) {
; CHECK-LABEL: define i64 @select_fcmp_const_fast(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ITER_CHECK:.*]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK: [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i64> [ splat (i64 -9223372036854775808), %[[VECTOR_PH]] ], [ [[TMP4:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[TMP0]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP1]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = fcmp fast ueq <4 x float> [[WIDE_LOAD]], splat (float 3.000000e+00)
; CHECK-NEXT: [[TMP4]] = select <4 x i1> [[TMP3]], <4 x i64> [[VEC_IND]], <4 x i64> [[VEC_PHI]]
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[TMP0]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i64> [[VEC_IND]], splat (i64 4)
; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP6:%.*]] = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> [[TMP4]])
; CHECK-NEXT: [[RDX_SELECT_CMP:%.*]] = icmp ne i64 [[TMP6]], -9223372036854775808
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[RDX_SELECT_CMP]], i64 [[TMP6]], i64 2
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK: [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[N]], [[N_VEC]]
; CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 4
; CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]]
; CHECK: [[VEC_EPILOG_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX1:%.*]] = phi i64 [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 2, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[BC_MERGE_RDX1]], 2
; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = select i1 [[TMP14]], i64 -9223372036854775808, i64 [[BC_MERGE_RDX1]]
; CHECK-NEXT: [[N_MOD_VF2:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT: [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <4 x i64> poison, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <4 x i64> [[DOTSPLATINSERT]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT8:%.*]] = insertelement <4 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT: [[DOTSPLAT9:%.*]] = shufflevector <4 x i64> [[DOTSPLATINSERT8]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i64> [[DOTSPLAT9]], <i64 0, i64 1, i64 2, i64 3>
; CHECK-NEXT: br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK: [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT: [[TMP7:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT9:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND5:%.*]] = phi <4 x i64> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI7:%.*]] = phi <4 x i64> [ [[DOTSPLAT]], %[[VEC_EPILOG_PH]] ], [ [[TMP11:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[TMP7]]
; CHECK-NEXT: [[WIDE_LOAD8:%.*]] = load <4 x float>, ptr [[TMP8]], align 4
; CHECK-NEXT: [[TMP10:%.*]] = fcmp fast ueq <4 x float> [[WIDE_LOAD8]], splat (float 3.000000e+00)
; CHECK-NEXT: [[TMP11]] = select <4 x i1> [[TMP10]], <4 x i64> [[VEC_IND5]], <4 x i64> [[VEC_PHI7]]
; CHECK-NEXT: [[INDEX_NEXT9]] = add nuw i64 [[TMP7]], 4
; CHECK-NEXT: [[VEC_IND_NEXT6]] = add <4 x i64> [[VEC_IND5]], splat (i64 4)
; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT9]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[TMP12]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP13:%.*]] = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> [[TMP11]])
; CHECK-NEXT: [[RDX_SELECT_CMP10:%.*]] = icmp ne i64 [[TMP13]], -9223372036854775808
; CHECK-NEXT: [[RDX_SELECT11:%.*]] = select i1 [[RDX_SELECT_CMP10]], i64 [[TMP13]], i64 2
; CHECK-NEXT: [[CMP_N12:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[CMP_N12]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK: [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL15:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX16:%.*]] = phi i64 [ [[RDX_SELECT11]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 2, %[[ITER_CHECK]] ]
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL15]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[RDX:%.*]] = phi i64 [ [[BC_MERGE_RDX16]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SEL:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[C:%.*]] = fcmp fast ueq float [[L]], 3.000000e+00
; CHECK-NEXT: [[SEL]] = select i1 [[C]], i64 [[IV]], i64 [[RDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i64 [ [[SEL]], %[[LOOP]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ], [ [[RDX_SELECT11]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i64 [[SEL_LCSSA]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%rdx = phi i64 [ 2, %entry ], [ %sel, %loop ]
%gep = getelementptr inbounds float, ptr %a, i64 %iv
%l = load float, ptr %gep, align 4
%c = fcmp fast ueq float %l, 3.0
%sel = select i1 %c, i64 %iv, i64 %rdx
%iv.next = add nuw nsw i64 %iv, 1
%ec = icmp eq i64 %iv.next, %n
br i1 %ec, label %exit, label %loop
exit:
ret i64 %sel
}
define i8 @select_icmp_var_start(ptr %a, i8 %n, i8 %start) {
; CHECK-LABEL: define i8 @select_icmp_var_start(
; CHECK-SAME: ptr [[A:%.*]], i8 [[N:%.*]], i8 [[START:%.*]]) {
; CHECK-NEXT: [[ITER_CHECK:.*]]:
; CHECK-NEXT: [[TMP0:%.*]] = add i8 [[N]], -1
; CHECK-NEXT: [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
; CHECK-NEXT: [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 4
; CHECK-NEXT: [[FR:%.*]] = freeze i8 [[START]]
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK: [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i32 [[TMP2]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 4
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT: [[TMP3:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i8> [ <i8 0, i8 1, i8 2, i8 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i8> [ splat (i8 -128), %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP4:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i8, ptr [[A]], i8 [[TMP4]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i8>, ptr [[TMP5]], align 8
; CHECK-NEXT: [[TMP7:%.*]] = icmp eq <4 x i8> [[WIDE_LOAD]], splat (i8 3)
; CHECK-NEXT: [[TMP8]] = select <4 x i1> [[TMP7]], <4 x i8> [[VEC_IND]], <4 x i8> [[VEC_PHI]]
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i8> [[VEC_IND]], splat (i8 4)
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i8 @llvm.vector.reduce.smax.v4i8(<4 x i8> [[TMP8]])
; CHECK-NEXT: [[RDX_SELECT_CMP:%.*]] = icmp ne i8 [[TMP10]], -128
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[RDX_SELECT_CMP]], i8 [[TMP10]], i8 [[FR]]
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK: [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT: [[IND_END:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i32 [[N_VEC_REMAINING]], 4
; CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]]
; CHECK: [[VEC_EPILOG_PH]]:
; CHECK-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i8 [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi i8 [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[FR]], %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[TMP11:%.*]] = icmp eq i8 [[BC_MERGE_RDX]], [[FR]]
; CHECK-NEXT: [[TMP12:%.*]] = select i1 [[TMP11]], i8 -128, i8 [[BC_MERGE_RDX]]
; CHECK-NEXT: [[N_MOD_VF2:%.*]] = urem i32 [[TMP2]], 4
; CHECK-NEXT: [[N_VEC3:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF2]]
; CHECK-NEXT: [[TMP13:%.*]] = trunc i32 [[N_VEC3]] to i8
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <4 x i8> poison, i8 [[TMP12]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <4 x i8> [[DOTSPLATINSERT]], <4 x i8> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT8:%.*]] = insertelement <4 x i8> poison, i8 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT: [[DOTSPLAT9:%.*]] = shufflevector <4 x i8> [[DOTSPLATINSERT8]], <4 x i8> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i8> [[DOTSPLAT9]], <i8 0, i8 1, i8 2, i8 3>
; CHECK-NEXT: br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK: [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX4:%.*]] = phi i32 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT11:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND5:%.*]] = phi <4 x i8> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI7:%.*]] = phi <4 x i8> [ [[DOTSPLAT]], %[[VEC_EPILOG_PH]] ], [ [[TMP17:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX4]] to i8
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds i8, ptr [[A]], i8 [[OFFSET_IDX]]
; CHECK-NEXT: [[WIDE_LOAD10:%.*]] = load <4 x i8>, ptr [[TMP14]], align 8
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq <4 x i8> [[WIDE_LOAD10]], splat (i8 3)
; CHECK-NEXT: [[TMP17]] = select <4 x i1> [[TMP16]], <4 x i8> [[VEC_IND5]], <4 x i8> [[VEC_PHI7]]
; CHECK-NEXT: [[INDEX_NEXT11]] = add nuw i32 [[INDEX4]], 4
; CHECK-NEXT: [[VEC_IND_NEXT6]] = add <4 x i8> [[VEC_IND5]], splat (i8 4)
; CHECK-NEXT: [[TMP18:%.*]] = icmp eq i32 [[INDEX_NEXT11]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[TMP18]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK: [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP19:%.*]] = call i8 @llvm.vector.reduce.smax.v4i8(<4 x i8> [[TMP17]])
; CHECK-NEXT: [[RDX_SELECT_CMP12:%.*]] = icmp ne i8 [[TMP19]], -128
; CHECK-NEXT: [[RDX_SELECT13:%.*]] = select i1 [[RDX_SELECT_CMP12]], i8 [[TMP19]], i8 [[FR]]
; CHECK-NEXT: [[CMP_N14:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC3]]
; CHECK-NEXT: br i1 [[CMP_N14]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK: [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT: [[BC_RESUME_VAL15:%.*]] = phi i8 [ [[TMP13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT: [[BC_MERGE_RDX16:%.*]] = phi i8 [ [[RDX_SELECT13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[START]], %[[ITER_CHECK]] ]
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL15]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[RDX:%.*]] = phi i8 [ [[BC_MERGE_RDX16]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SEL:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[A]], i8 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load i8, ptr [[GEP]], align 8
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[L]], 3
; CHECK-NEXT: [[SEL]] = select i1 [[C]], i8 [[IV]], i8 [[RDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i8 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i8 [ [[SEL]], %[[LOOP]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ], [ [[RDX_SELECT13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i8 [[SEL_LCSSA]]
;
entry:
br label %loop
loop:
%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
%rdx = phi i8 [ %start, %entry ], [ %sel, %loop ]
%gep = getelementptr inbounds i8, ptr %a, i8 %iv
%l = load i8, ptr %gep, align 8
%c = icmp eq i8 %l, 3
%sel = select i1 %c, i8 %iv, i8 %rdx
%iv.next = add nuw nsw i8 %iv, 1
%ec = icmp eq i8 %iv.next, %n
br i1 %ec, label %exit, label %loop
exit:
ret i8 %sel
}
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