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; RUN: opt < %s -analyze -scalar-evolution -scalar-evolution-max-iterations=0 | FileCheck %s
; PR1101
@A = weak global [1000 x i32] zeroinitializer, align 32
define void @test1(i32 %N) {
entry:
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
br label %bb3
bb: ; preds = %bb3
%tmp = getelementptr [1000 x i32]* @A, i32 0, i32 %i.0 ; <i32*> [#uses=1]
store i32 123, i32* %tmp
%tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1]
br label %bb3
bb3: ; preds = %bb, %entry
%i.0 = phi i32 [ 2, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3]
%SQ = mul i32 %i.0, %i.0
%tmp4 = mul i32 %i.0, 2
%tmp5 = sub i32 %SQ, %tmp4
%tmp3 = icmp sle i32 %tmp5, 9999 ; <i1> [#uses=1]
br i1 %tmp3, label %bb, label %bb5
bb5: ; preds = %bb3
br label %return
return: ; preds = %bb5
ret void
}
; CHECK: Determining loop execution counts for: @test1
; CHECK-NEXT: backedge-taken count is 100
; PR10383
; These next two used to crash.
define void @test2(i1 %cmp, i64 %n) {
entry:
br label %for.body1
for.body1:
%a0.08 = phi i64 [ 0, %entry ], [ %inc512, %for.body1 ]
%inc512 = add i64 %a0.08, 1
br i1 %cmp, label %preheader, label %for.body1
preheader:
br label %for.body2
for.body2:
%indvar = phi i64 [ 0, %preheader ], [ %indvar.next, %for.body2 ]
%tmp111 = add i64 %n, %indvar
%tmp114 = mul i64 %a0.08, %indvar
%mul542 = mul i64 %tmp114, %tmp111
%indvar.next = add i64 %indvar, 1
br i1 undef, label %end, label %for.body2
end:
ret void
}
; CHECK: Determining loop execution counts for: @test2
define i32 @test3() {
if.then466:
br i1 undef, label %for.cond539.preheader, label %for.inc479
for.inc479:
%a2.07 = phi i32 [ %add495, %for.inc479 ], [ 0, %if.then466 ]
%j.36 = phi i32 [ %inc497, %for.inc479 ], [ undef, %if.then466 ]
%mul484 = mul nsw i32 %j.36, %j.36
%mul491 = mul i32 %j.36, %j.36
%mul493 = mul i32 %mul491, %mul484
%add495 = add nsw i32 %mul493, %a2.07
%inc497 = add nsw i32 %j.36, 1
br i1 undef, label %for.cond539.preheader, label %for.inc479
for.cond539.preheader:
unreachable
}
; CHECK: Determining loop execution counts for: @test3
; PR13489
; We used to crash on this too.
define void @test4() {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%v2.02 = phi i64 [ 2, %entry ], [ %phitmp, %for.body ]
%v1.01 = phi i64 [ -2, %entry ], [ %sub1, %for.body ]
%sub1 = sub i64 %v1.01, %v2.02
%phitmp = add i64 %v2.02, 2
%tobool = icmp eq i64 %sub1, %phitmp
br i1 %tobool, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
; CHECK: Determining loop execution counts for: @test4
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