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