basic-loopnest.ll
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; RUN: opt < %s -disable-output "-passes=print<ddg>" 2>&1 | FileCheck %s
; CHECK-LABEL: 'DDG' for loop 'test1.for.cond1.preheader':
; CHECK: Node Address:[[N1:0x[0-9a-f]*]]:pi-block
; CHECK-NEXT:--- start of nodes in pi-block ---
; CHECK: Node Address:[[N2:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %j.02 = phi i64 [ %inc, %for.body4 ], [ 1, %for.body4.preheader ]
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N3:0x[0-9a-f]*]]
; CHECK: Node Address:[[N3]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %inc = add i64 %j.02, 1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N2]]
; CHECK-NEXT:--- end of nodes in pi-block ---
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N4:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N5:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N6:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N7:0x[0-9a-f]*]]
; CHECK: Node Address:[[N5]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %sub7 = add i64 %j.02, -1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N8:0x[0-9a-f]*]]
; CHECK: Node Address:[[N9:0x[0-9a-f]*]]:pi-block
; CHECK-NEXT:--- start of nodes in pi-block ---
; CHECK: Node Address:[[N10:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %i.04 = phi i64 [ %inc13, %for.inc12 ], [ 0, %test1.for.cond1.preheader.preheader ]
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N11:0x[0-9a-f]*]]
; CHECK: Node Address:[[N11]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %inc13 = add i64 %i.04, 1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N10]]
; CHECK-NEXT:--- end of nodes in pi-block ---
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N12:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N13:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N14:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N15:0x[0-9a-f]*]]
; CHECK: Node Address:[[N15]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %exitcond = icmp ne i64 %inc13, %n
; CHECK-NEXT: br i1 %exitcond, label %test1.for.cond1.preheader, label %for.end14.loopexit
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N14]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %4 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx10 = getelementptr inbounds float, float* %a, i64 %4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N6]]
; CHECK: Node Address:[[N6]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx11 = getelementptr inbounds float, float* %arrayidx10, i64 %j.02
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N18:0x[0-9a-f]*]]
; CHECK: Node Address:[[N13]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %2 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx6 = getelementptr inbounds float, float* %a, i64 %2
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N8]]
; CHECK: Node Address:[[N8]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx8 = getelementptr inbounds float, float* %arrayidx6, i64 %sub7
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N18]]
; CHECK: Node Address:[[N12]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %0 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx = getelementptr inbounds float, float* %b, i64 %0
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N4]]
; CHECK: Node Address:[[N4]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx5 = getelementptr inbounds float, float* %arrayidx, i64 %j.02
; CHECK-NEXT: %1 = load float, float* %arrayidx5, align 4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N18]]
; CHECK: Node Address:[[N18]]:pi-block
; CHECK-NEXT:--- start of nodes in pi-block ---
; CHECK: Node Address:[[N22:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %3 = load float, float* %arrayidx8, align 4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N23:0x[0-9a-f]*]]
; CHECK: Node Address:[[N23]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %add = fadd float %1, %3
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N24:0x[0-9a-f]*]]
; CHECK: Node Address:[[N24]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: store float %add, float* %arrayidx11, align 4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [memory] to [[N22]]
; CHECK-NEXT:--- end of nodes in pi-block ---
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N25:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: br label %for.inc12
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N26:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: br label %for.body4
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N27:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %sub = add i64 %n, -1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N7]]
; CHECK-NEXT: [def-use] to [[N28:0x[0-9a-f]*]]
; CHECK: Node Address:[[N28]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %cmp21 = icmp ult i64 1, %sub
; CHECK-NEXT: br i1 %cmp21, label %for.body4.preheader, label %for.inc12
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N7]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %cmp2 = icmp ult i64 %inc, %sub
; CHECK-NEXT: br i1 %cmp2, label %for.body4, label %for.inc12.loopexit
; CHECK-NEXT: Edges:none!
;; This test has a cycle.
;; void test1(unsigned long n, float a[][n], float b[][n]) {
;; for (unsigned long i = 0; i < n; i++)
;; for (unsigned long j = 1; j < n-1; j++)
;; a[i][j] = b[i][j] + a[i][j-1];
;; }
define void @test1(i64 %n, float* noalias %a, float* noalias %b) {
entry:
%exitcond3 = icmp ne i64 0, %n
br i1 %exitcond3, label %test1.for.cond1.preheader, label %for.end14
test1.for.cond1.preheader: ; preds = %entry, %for.inc12
%i.04 = phi i64 [ %inc13, %for.inc12 ], [ 0, %entry ]
%sub = add i64 %n, -1
%cmp21 = icmp ult i64 1, %sub
br i1 %cmp21, label %for.body4, label %for.inc12
for.body4: ; preds = %test1.for.cond1.preheader, %for.body4
%j.02 = phi i64 [ %inc, %for.body4 ], [ 1, %test1.for.cond1.preheader ]
%0 = mul nsw i64 %i.04, %n
%arrayidx = getelementptr inbounds float, float* %b, i64 %0
%arrayidx5 = getelementptr inbounds float, float* %arrayidx, i64 %j.02
%1 = load float, float* %arrayidx5, align 4
%2 = mul nsw i64 %i.04, %n
%arrayidx6 = getelementptr inbounds float, float* %a, i64 %2
%sub7 = add i64 %j.02, -1
%arrayidx8 = getelementptr inbounds float, float* %arrayidx6, i64 %sub7
%3 = load float, float* %arrayidx8, align 4
%add = fadd float %1, %3
%4 = mul nsw i64 %i.04, %n
%arrayidx10 = getelementptr inbounds float, float* %a, i64 %4
%arrayidx11 = getelementptr inbounds float, float* %arrayidx10, i64 %j.02
store float %add, float* %arrayidx11, align 4
%inc = add i64 %j.02, 1
%cmp2 = icmp ult i64 %inc, %sub
br i1 %cmp2, label %for.body4, label %for.inc12
for.inc12: ; preds = %for.body4, %test1.for.cond1.preheader
%inc13 = add i64 %i.04, 1
%exitcond = icmp ne i64 %inc13, %n
br i1 %exitcond, label %test1.for.cond1.preheader, label %for.end14
for.end14: ; preds = %for.inc12, %entry
ret void
}
; CHECK-LABEL: 'DDG' for loop 'test2.for.cond1.preheader':
; CHECK: Node Address:[[PI1:0x[0-9a-f]*]]:pi-block
; CHECK-NEXT:--- start of nodes in pi-block ---
; CHECK: Node Address:[[N1:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %j.02 = phi i64 [ %inc, %for.body4 ], [ 1, %for.body4.preheader ]
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N2:0x[0-9a-f]*]]
; CHECK: Node Address:[[N2]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %inc = add i64 %j.02, 1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N1]]
; CHECK-NEXT:--- end of nodes in pi-block ---
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N3:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N4:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N5:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N6:0x[0-9a-f]*]]
; CHECK: Node Address:[[N4]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %add7 = add i64 %j.02, 1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N7:0x[0-9a-f]*]]
; CHECK: Node Address:[[N8:0x[0-9a-f]*]]:pi-block
; CHECK-NEXT:--- start of nodes in pi-block ---
; CHECK: Node Address:[[N9:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %i.04 = phi i64 [ %inc13, %for.inc12 ], [ 0, %test2.for.cond1.preheader.preheader ]
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N10:0x[0-9a-f]*]]
; CHECK: Node Address:[[N10]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %inc13 = add i64 %i.04, 1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N9]]
; CHECK-NEXT:--- end of nodes in pi-block ---
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N11:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N12:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N13:0x[0-9a-f]*]]
; CHECK-NEXT: [def-use] to [[N14:0x[0-9a-f]*]]
; CHECK: Node Address:[[N14]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %exitcond = icmp ne i64 %inc13, %n
; CHECK-NEXT: br i1 %exitcond, label %test2.for.cond1.preheader, label %for.end14.loopexit
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N13]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %4 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx10 = getelementptr inbounds float, float* %a, i64 %4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N5]]
; CHECK: Node Address:[[N5]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx11 = getelementptr inbounds float, float* %arrayidx10, i64 %j.02
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N17:0x[0-9a-f]*]]
; CHECK: Node Address:[[N12]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %2 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx6 = getelementptr inbounds float, float* %a, i64 %2
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N7]]
; CHECK: Node Address:[[N7]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx8 = getelementptr inbounds float, float* %arrayidx6, i64 %add7
; CHECK-NEXT: %3 = load float, float* %arrayidx8, align 4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N20:0x[0-9a-f]*]]
; CHECK-NEXT: [memory] to [[N17]]
; CHECK: Node Address:[[N11]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %0 = mul nsw i64 %i.04, %n
; CHECK-NEXT: %arrayidx = getelementptr inbounds float, float* %b, i64 %0
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N3]]
; CHECK: Node Address:[[N3]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %arrayidx5 = getelementptr inbounds float, float* %arrayidx, i64 %j.02
; CHECK-NEXT: %1 = load float, float* %arrayidx5, align 4
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N20]]
; CHECK: Node Address:[[N20]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %add = fadd float %1, %3
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N17]]
; CHECK: Node Address:[[N17]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: store float %add, float* %arrayidx11, align 4
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N23:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: br label %for.inc12
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N24:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: br label %for.body4
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N25:0x[0-9a-f]*]]:single-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %sub = add i64 %n, -1
; CHECK-NEXT: Edges:
; CHECK-NEXT: [def-use] to [[N6]]
; CHECK-NEXT: [def-use] to [[N26:0x[0-9a-f]*]]
; CHECK: Node Address:[[N26]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %cmp21 = icmp ult i64 1, %sub
; CHECK-NEXT: br i1 %cmp21, label %for.body4.preheader, label %for.inc12
; CHECK-NEXT: Edges:none!
; CHECK: Node Address:[[N6]]:multi-instruction
; CHECK-NEXT: Instructions:
; CHECK-NEXT: %cmp2 = icmp ult i64 %inc, %sub
; CHECK-NEXT: br i1 %cmp2, label %for.body4, label %for.inc12.loopexit
; CHECK-NEXT: Edges:none!
;; This test has no cycles.
;; void test2(unsigned long n, float a[][n], float b[][n]) {
;; for (unsigned long i = 0; i < n; i++)
;; for (unsigned long j = 1; j < n-1; j++)
;; a[i][j] = b[i][j] + a[i][j+1];
;; }
define void @test2(i64 %n, float* noalias %a, float* noalias %b) {
entry:
%exitcond3 = icmp ne i64 0, %n
br i1 %exitcond3, label %test2.for.cond1.preheader, label %for.end14
test2.for.cond1.preheader: ; preds = %entry, %for.inc12
%i.04 = phi i64 [ %inc13, %for.inc12 ], [ 0, %entry ]
%sub = add i64 %n, -1
%cmp21 = icmp ult i64 1, %sub
br i1 %cmp21, label %for.body4, label %for.inc12
for.body4: ; preds = %test2.for.cond1.preheader, %for.body4
%j.02 = phi i64 [ %inc, %for.body4 ], [ 1, %test2.for.cond1.preheader ]
%0 = mul nsw i64 %i.04, %n
%arrayidx = getelementptr inbounds float, float* %b, i64 %0
%arrayidx5 = getelementptr inbounds float, float* %arrayidx, i64 %j.02
%1 = load float, float* %arrayidx5, align 4
%2 = mul nsw i64 %i.04, %n
%arrayidx6 = getelementptr inbounds float, float* %a, i64 %2
%add7 = add i64 %j.02, 1
%arrayidx8 = getelementptr inbounds float, float* %arrayidx6, i64 %add7
%3 = load float, float* %arrayidx8, align 4
%add = fadd float %1, %3
%4 = mul nsw i64 %i.04, %n
%arrayidx10 = getelementptr inbounds float, float* %a, i64 %4
%arrayidx11 = getelementptr inbounds float, float* %arrayidx10, i64 %j.02
store float %add, float* %arrayidx11, align 4
%inc = add i64 %j.02, 1
%cmp2 = icmp ult i64 %inc, %sub
br i1 %cmp2, label %for.body4, label %for.inc12
for.inc12: ; preds = %for.body4, %test2.for.cond1.preheader
%inc13 = add i64 %i.04, 1
%exitcond = icmp ne i64 %inc13, %n
br i1 %exitcond, label %test2.for.cond1.preheader, label %for.end14
for.end14: ; preds = %for.inc12, %entry
ret void
}