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llvm-project/llvm/test/Transforms/LoopVectorize/assume.ll
Ramkumar Ramachandra f03345a07a
[LV] Improve a test; get rid of runtime checks (#152182)
2025-08-05 18:48:10 +01:00

207 lines
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LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 5
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=2 -S | FileCheck %s
define void @test1(ptr noalias nocapture %a, ptr noalias nocapture readonly %b) {
; CHECK-LABEL: define void @test1(
; CHECK-SAME: ptr noalias captures(none) [[A:%.*]], ptr noalias readonly captures(none) [[B:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds float, ptr [[TMP0]], i32 2
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, ptr [[TMP0]], align 4
; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <2 x float>, ptr [[TMP7]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = fcmp ogt <2 x float> [[WIDE_LOAD]], splat (float 1.000000e+02)
; CHECK-NEXT: [[TMP2:%.*]] = fcmp ogt <2 x float> [[WIDE_LOAD1]], splat (float 1.000000e+02)
; CHECK-NEXT: [[TMP3:%.*]] = extractelement <2 x i1> [[TMP1]], i32 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TMP3]])
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i1> [[TMP1]], i32 1
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TMP4]])
; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TMP5]])
; CHECK-NEXT: [[TMP6:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TMP6]])
; CHECK-NEXT: [[TMP8:%.*]] = fadd <2 x float> [[WIDE_LOAD]], splat (float 1.000000e+00)
; CHECK-NEXT: [[TMP9:%.*]] = fadd <2 x float> [[WIDE_LOAD1]], splat (float 1.000000e+00)
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds float, ptr [[TMP10]], i32 2
; CHECK-NEXT: store <2 x float> [[TMP8]], ptr [[TMP10]], align 4
; CHECK-NEXT: store <2 x float> [[TMP9]], ptr [[TMP11]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1600
; CHECK-NEXT: br i1 [[TMP12]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: br [[FOR_END:label %.*]]
; CHECK: [[SCALAR_PH]]:
;
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %b, i64 %indvars.iv
%0 = load float, ptr %arrayidx, align 4
%cmp1 = fcmp ogt float %0, 1.000000e+02
tail call void @llvm.assume(i1 %cmp1)
%add = fadd float %0, 1.000000e+00
%arrayidx5 = getelementptr inbounds float, ptr %a, i64 %indvars.iv
store float %add, ptr %arrayidx5, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 1599
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
declare void @llvm.assume(i1) #0
attributes #0 = { nounwind willreturn }
define void @test2(ptr noalias %a, ptr noalias %b) {
; CHECK-LABEL: define void @test2(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[PTRINT:%.*]] = ptrtoint ptr [[A]] to i64
; CHECK-NEXT: [[MASKEDPTR:%.*]] = and i64 [[PTRINT]], 31
; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 0
; CHECK-NEXT: [[PTRINT2:%.*]] = ptrtoint ptr [[B]] to i64
; CHECK-NEXT: [[MASKEDPTR3:%.*]] = and i64 [[PTRINT2]], 31
; CHECK-NEXT: [[MASKCOND4:%.*]] = icmp eq i64 [[MASKEDPTR3]], 0
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds float, ptr [[TMP3]], i32 2
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, ptr [[TMP3]], align 4
; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <2 x float>, ptr [[TMP4]], align 4
; CHECK-NEXT: [[TMP5:%.*]] = fadd <2 x float> [[WIDE_LOAD]], splat (float 1.000000e+00)
; CHECK-NEXT: [[TMP6:%.*]] = fadd <2 x float> [[WIDE_LOAD1]], splat (float 1.000000e+00)
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND4]])
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND4]])
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds float, ptr [[TMP7]], i32 2
; CHECK-NEXT: store <2 x float> [[TMP5]], ptr [[TMP7]], align 4
; CHECK-NEXT: store <2 x float> [[TMP6]], ptr [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1600
; CHECK-NEXT: br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: br [[FOR_END:label %.*]]
; CHECK: [[SCALAR_PH]]:
;
entry:
%ptrint = ptrtoint ptr %a to i64
%maskedptr = and i64 %ptrint, 31
%maskcond = icmp eq i64 %maskedptr, 0
%ptrint2 = ptrtoint ptr %b to i64
%maskedptr3 = and i64 %ptrint2, 31
%maskcond4 = icmp eq i64 %maskedptr3, 0
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
tail call void @llvm.assume(i1 %maskcond)
%arrayidx = getelementptr inbounds float, ptr %a, i64 %indvars.iv
%2 = load float, ptr %arrayidx, align 4
%add = fadd float %2, 1.000000e+00
tail call void @llvm.assume(i1 %maskcond4)
%arrayidx5 = getelementptr inbounds float, ptr %b, i64 %indvars.iv
store float %add, ptr %arrayidx5, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 1599
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
; Test case for PR43620. Make sure we can vectorize with predication in presence
; of assume calls. For now, check that we drop all assumes in predicated blocks
; in the vector body.
define void @predicated_assume(ptr noalias nocapture readonly %a, ptr noalias nocapture %b, i32 %n) {
; Check that the vector.body does not contain any assumes.
; CHECK-LABEL: define void @predicated_assume(
; CHECK-SAME: ptr noalias readonly captures(none) [[A:%.*]], ptr noalias captures(none) [[B:%.*]], i32 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[CMP15:%.*]] = icmp eq i32 [[N]], 0
; CHECK-NEXT: br i1 [[CMP15]], [[FOR_COND_CLEANUP:label %.*]], label %[[FOR_BODY_PREHEADER:.*]]
; CHECK: [[FOR_BODY_PREHEADER]]:
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 4
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[STEP_ADD:%.*]] = add <2 x i64> [[VEC_IND]], splat (i64 2)
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i64> [[VEC_IND]], splat (i64 495616)
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult <2 x i64> [[STEP_ADD]], splat (i64 495616)
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP1]], <2 x float> splat (float 2.300000e+01), <2 x float> splat (float 4.200000e+01)
; CHECK-NEXT: [[PREDPHI1:%.*]] = select <2 x i1> [[TMP2]], <2 x float> splat (float 2.300000e+01), <2 x float> splat (float 4.200000e+01)
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds float, ptr [[TMP3]], i32 2
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, ptr [[TMP3]], align 4
; CHECK-NEXT: [[WIDE_LOAD2:%.*]] = load <2 x float>, ptr [[TMP4]], align 4
; CHECK-NEXT: [[TMP5:%.*]] = fmul <2 x float> [[PREDPHI]], [[WIDE_LOAD]]
; CHECK-NEXT: [[TMP6:%.*]] = fmul <2 x float> [[PREDPHI1]], [[WIDE_LOAD2]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds float, ptr [[TMP7]], i32 2
; CHECK-NEXT: store <2 x float> [[TMP5]], ptr [[TMP7]], align 4
; CHECK-NEXT: store <2 x float> [[TMP6]], ptr [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], splat (i64 2)
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], [[FOR_COND_CLEANUP_LOOPEXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK: [[SCALAR_PH]]:
;
entry:
%cmp15 = icmp eq i32 %n, 0
br i1 %cmp15, label %for.cond.cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
%0 = zext i32 %n to i64
br label %for.body
for.cond.cleanup.loopexit: ; preds = %if.end5
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
ret void
for.body: ; preds = %for.body.preheader, %if.end5
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %if.end5 ]
%cmp1 = icmp ult i64 %indvars.iv, 495616
br i1 %cmp1, label %if.end5, label %if.else
if.else: ; preds = %for.body
%cmp2 = icmp ult i64 %indvars.iv, 991232
tail call void @llvm.assume(i1 %cmp2)
br label %if.end5
if.end5: ; preds = %for.body, %if.else
%x.0 = phi float [ 4.200000e+01, %if.else ], [ 2.300000e+01, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %a, i64 %indvars.iv
%1 = load float, ptr %arrayidx, align 4
%mul = fmul float %x.0, %1
%arrayidx7 = getelementptr inbounds float, ptr %b, i64 %indvars.iv
store float %mul, ptr %arrayidx7, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%cmp = icmp eq i64 %indvars.iv.next, %0
br i1 %cmp, label %for.cond.cleanup.loopexit, label %for.body
}
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