ce5620ba9a
By choosing an initial value whose mask is only used by the blend we can remove the need for the mask entirely.
89 lines
3.4 KiB
LLVM
89 lines
3.4 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes='function(loop-vectorize,instcombine)' -force-vector-width=2 -force-vector-interleave=1 -debug-only=loop-vectorize -disable-output -print-after=instcombine 2>&1 | FileCheck %s
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target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
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; CHECK-LABEL: phi_two_incoming_values
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; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
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; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %tmp5 = phi i32 [ %tmp1, %for.body ], [ %tmp4, %if.then ]
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; CHECK: define void @phi_two_incoming_values(
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
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; CHECK: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr {{.*}}
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; CHECK: [[TMP5:%.*]] = icmp sgt <2 x i32> [[WIDE_LOAD]], zeroinitializer
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; CHECK-NEXT: [[TMP6:%.*]] = zext <2 x i1> [[TMP5]] to <2 x i32>
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; CHECK-NEXT: [[PREDPHI:%.*]] = add <2 x i32> [[WIDE_LOAD]], [[TMP6]]
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; CHECK: store <2 x i32> [[PREDPHI]], ptr {{.*}}
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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;
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define void @phi_two_incoming_values(ptr %a, ptr %b, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
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%tmp0 = getelementptr inbounds i32, ptr %a, i64 %i
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%tmp1 = load i32, ptr %tmp0, align 4
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%tmp2 = getelementptr inbounds i32, ptr %b, i64 %i
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%tmp3 = icmp sgt i32 %tmp1, 0
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br i1 %tmp3, label %if.then, label %if.end
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if.then:
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%tmp4 = add i32 %tmp1, 1
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br label %if.end
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if.end:
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%tmp5 = phi i32 [ %tmp1, %for.body ], [ %tmp4, %if.then ]
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store i32 %tmp5, ptr %tmp2, align 4
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%i.next = add i64 %i, 1
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%cond = icmp eq i64 %i, %n
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br i1 %cond, label %for.end, label %for.body
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for.end:
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ret void
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}
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; CHECK-LABEL: phi_three_incoming_values
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; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: %i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
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; CHECK: LV: Found an estimated cost of 2 for VF 2 For instruction: %tmp8 = phi i32 [ 9, %for.body ], [ 3, %if.then ], [ %tmp7, %if.else ]
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; CHECK: define void @phi_three_incoming_values(
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
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; CHECK: [[PREDPHI:%.*]] = select <2 x i1> {{.*}}, <2 x i32> {{.*}}, <2 x i32> <i32 3, i32 3>
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; CHECK: [[PREDPHI7:%.*]] = select <2 x i1> {{.*}}, <2 x i32> [[PREDPHI]], <2 x i32> <i32 9, i32 9>
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; CHECK: store <2 x i32> [[PREDPHI7]], ptr {{.*}}
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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;
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define void @phi_three_incoming_values(ptr %a, ptr %b, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%i = phi i64 [ %i.next, %if.end ], [ 0, %entry ]
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%tmp0 = getelementptr inbounds i32, ptr %a, i64 %i
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%tmp1 = load i32, ptr %tmp0, align 4
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%tmp2 = getelementptr inbounds i32, ptr %b, i64 %i
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%tmp3 = load i32, ptr %tmp2, align 4
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%tmp4 = icmp sgt i32 %tmp1, %tmp3
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br i1 %tmp4, label %if.then, label %if.end
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if.then:
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%tmp5 = icmp sgt i32 %tmp1, 19
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br i1 %tmp5, label %if.end, label %if.else
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if.else:
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%tmp6 = icmp slt i32 %tmp3, 4
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%tmp7 = select i1 %tmp6, i32 4, i32 5
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br label %if.end
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if.end:
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%tmp8 = phi i32 [ 9, %for.body ], [ 3, %if.then ], [ %tmp7, %if.else ]
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store i32 %tmp8, ptr %tmp0, align 4
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%i.next = add i64 %i, 1
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%cond = icmp eq i64 %i, %n
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br i1 %cond, label %for.end, label %for.body
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for.end:
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ret void
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}
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