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external/llvm/test/Transforms/NewGVN/predicates.ll
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external/llvm/test/Transforms/NewGVN/predicates.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -basicaa -newgvn -S < %s | FileCheck %s
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; Function Attrs: noinline norecurse nounwind readonly ssp uwtable
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define i32 @mp_unsgn_cmp(i32 %n, i32* nocapture readonly %in1, i32* nocapture readonly %in2) local_unnamed_addr {
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; CHECK-LABEL: @mp_unsgn_cmp(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP11:%.*]] = icmp sgt i32 [[N:%.*]], -1
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; CHECK-NEXT: br i1 [[CMP11]], label [[FOR_INC_PREHEADER:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: for.inc.preheader:
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; CHECK-NEXT: br label [[FOR_INC:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[STOREMERGE2:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_INC]] ], [ 0, [[FOR_INC_PREHEADER]] ]
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; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[STOREMERGE2]] to i64
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[IN1:%.*]], i64 [[IDXPROM]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, i32* [[IN2:%.*]], i64 [[IDXPROM]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX4]], align 4
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; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[TMP0]], [[TMP1]]
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; CHECK-NEXT: [[INC]] = add nsw i32 [[STOREMERGE2]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[STOREMERGE2]], [[N]]
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; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[SUB]], 0
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; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[CMP2]], [[CMP1]]
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; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_INC]], label [[FOR_END:%.*]]
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; CHECK: for.end:
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; CHECK-NEXT: [[CMP5:%.*]] = icmp sgt i32 [[SUB]], 0
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; CHECK-NEXT: br i1 [[CMP5]], label [[IF_END8:%.*]], label [[IF_ELSE]]
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; CHECK: if.else:
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; CHECK-NEXT: [[SUB1_LCSSA4:%.*]] = phi i32 [ [[SUB]], [[FOR_END]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[CMP6:%.*]] = icmp slt i32 [[SUB1_LCSSA4]], 0
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; CHECK-NEXT: [[DOTSUB1_LCSSA:%.*]] = select i1 [[CMP6]], i32 -1, i32 [[SUB1_LCSSA4]]
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; CHECK-NEXT: ret i32 [[DOTSUB1_LCSSA]]
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; CHECK: if.end8:
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; CHECK-NEXT: ret i32 1
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;
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entry:
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%cmp11 = icmp sgt i32 %n, -1
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br i1 %cmp11, label %for.inc.preheader, label %if.else
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for.inc.preheader: ; preds = %entry
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br label %for.inc
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for.inc: ; preds = %for.inc.preheader, %for.inc
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%storemerge2 = phi i32 [ %inc, %for.inc ], [ 0, %for.inc.preheader ]
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%idxprom = sext i32 %storemerge2 to i64
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%arrayidx = getelementptr inbounds i32, i32* %in1, i64 %idxprom
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx4 = getelementptr inbounds i32, i32* %in2, i64 %idxprom
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%1 = load i32, i32* %arrayidx4, align 4
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%sub = sub nsw i32 %0, %1
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%inc = add nsw i32 %storemerge2, 1
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%cmp1 = icmp slt i32 %storemerge2, %n
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%cmp2 = icmp eq i32 %sub, 0
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%or.cond = and i1 %cmp2, %cmp1
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;; This is a self-critical edge to for.inc. If we insert predicate info on it, we will insert
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;; predicateinfo at the end of this block, and think it dominates everthing using only dfs
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;; numbers, instead of proper edge dominance. We would then proceed to propagate the true value
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;; of sub == 0 everywhere, making this function only ever return 0.
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br i1 %or.cond, label %for.inc, label %for.end
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for.end: ; preds = %for.inc
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%sub.lcssa = phi i32 [ %sub, %for.inc ]
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%cmp5 = icmp sgt i32 %sub.lcssa, 0
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br i1 %cmp5, label %if.end8, label %if.else
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if.else: ; preds = %entry, %for.end
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%sub1.lcssa4 = phi i32 [ %sub.lcssa, %for.end ], [ 0, %entry ]
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%cmp6 = icmp slt i32 %sub1.lcssa4, 0
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%.sub1.lcssa = select i1 %cmp6, i32 -1, i32 %sub1.lcssa4
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ret i32 %.sub1.lcssa
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if.end8: ; preds = %for.end
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ret i32 1
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}
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;; This test will generate a copy of a copy of predicateinfo to the multiple uses
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;; of branch conditions below. Make sure we don't try to extract operand info.
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; Function Attrs: uwtable
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define fastcc void @barney() {
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; CHECK-LABEL: @barney(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: br label [[BB22:%.*]]
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; CHECK: bb22:
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; CHECK-NEXT: br i1 undef, label [[BB29:%.*]], label [[BB35:%.*]]
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; CHECK: bb29:
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; CHECK-NEXT: br i1 true, label [[BB33:%.*]], label [[BB35]]
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; CHECK: bb33:
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; CHECK-NEXT: br i1 true, label [[BB35]], label [[BB35]]
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; CHECK: bb35:
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; CHECK-NEXT: unreachable
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;
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bb:
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br label %bb22
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bb22: ; preds = %bb21
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%tmp23 = icmp eq i32 undef, 2
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br i1 %tmp23, label %bb29, label %bb35
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bb29: ; preds = %bb28
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br i1 %tmp23, label %bb33, label %bb35
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bb33: ; preds = %bb31
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br i1 %tmp23, label %bb35, label %bb35
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bb35: ; preds = %bb33, %bb29, %bb22
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unreachable
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}
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