335 lines
14 KiB
LLVM
335 lines
14 KiB
LLVM
; RUN: opt < %s -basic-aa -loop-interchange -pass-remarks-missed='loop-interchange' -verify-loop-lcssa -pass-remarks-output=%t -S
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; RUN: FileCheck --input-file %t --check-prefix REMARK %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@A = common global [100 x [100 x i32]] zeroinitializer
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@C = common global [100 x [100 x i32]] zeroinitializer
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@X = common global i32 0
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@Y = common global i64 0
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@F = common global float 0.0
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; We cannot interchange this loop at the moment, because iv.outer.next is
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; produced in the outer loop latch and used in the loop exit block. If the inner
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; loop body is not executed, the outer loop latch won't be executed either
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; after interchanging.
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; REMARK: UnsupportedExitPHI
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; REMARK-NEXT: lcssa_01
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define void @lcssa_01() {
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entry:
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%cmp21 = icmp sgt i64 100, 1
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br i1 %cmp21, label %outer.ph, label %for.end16
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outer.ph: ; preds = %entry
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%cmp218 = icmp sgt i64 100, 1
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br label %outer.header
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outer.header: ; preds = %outer.inc, %outer.ph
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%iv.outer = phi i64 [ 1, %outer.ph ], [ %iv.outer.next, %outer.inc ]
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br i1 %cmp218, label %for.body3, label %outer.inc
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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store i32 %add, i32* %arrayidx5
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %for.body3, %outer.header
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%iv.outer.next.lcssa = phi i64 [ %iv.outer.next, %outer.inc ]
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store i64 %iv.outer.next.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit, %entry
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ret void
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}
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; REMARK: UnsupportedExitPHI
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; REMARK-NEXT: lcssa_02
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define void @lcssa_02() {
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entry:
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%cmp21 = icmp sgt i64 100, 1
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br i1 %cmp21, label %outer.ph, label %for.end16
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outer.ph: ; preds = %entry
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%cmp218 = icmp sgt i64 100, 1
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br label %outer.header
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outer.header: ; preds = %outer.inc, %outer.ph
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%iv.outer = phi i64 [ 1, %outer.ph ], [ %iv.outer.next, %outer.inc ]
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br i1 %cmp218, label %for.body3, label %outer.inc
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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store i32 %add, i32* %arrayidx5
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %for.body3, %outer.header
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%iv.inner.end = phi i64 [ 0, %outer.header ], [ %iv.inner.next, %for.body3 ]
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%iv.inner.end.lcssa = phi i64 [ %iv.inner.end, %outer.inc ]
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store i64 %iv.inner.end.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit, %entry
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ret void
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}
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; REMARK: Interchanged
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; REMARK-NEXT: lcssa_03
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define void @lcssa_03() {
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entry:
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br label %outer.header
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outer.header: ; preds = %outer.inc, %entry
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%iv.outer = phi i64 [ 1, %entry ], [ %iv.outer.next, %outer.inc ]
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br label %for.body3
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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store i32 %add, i32* %arrayidx5
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %for.body3
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%iv.inner.lcssa = phi i64 [ %iv.inner, %for.body3 ]
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%iv.inner.lcssa.lcssa = phi i64 [ %iv.inner.lcssa, %outer.inc ]
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store i64 %iv.inner.lcssa.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit
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ret void
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}
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; Loops with floating point reductions are interchanged with fastmath.
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; REMARK: Interchanged
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; REMARK-NEXT: lcssa_04
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define void @lcssa_04() {
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entry:
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br label %outer.header
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outer.header: ; preds = %outer.inc, %entry
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%iv.outer = phi i64 [ 1, %entry ], [ %iv.outer.next, %outer.inc ]
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%float.outer = phi float [ 1.000000e+00, %entry ], [ %float.outer.next, %outer.inc ]
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br label %for.body3
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%float.inner = phi float [ %float.inner.next, %for.body3 ], [ %float.outer, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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%float.inner.next = fadd fast float %float.inner, 1.000000e+00
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store i32 %add, i32* %arrayidx5
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %for.body3
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%float.outer.next = phi float [ %float.inner.next, %for.body3 ]
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%float.outer.lcssa = phi float [ %float.outer.next, %outer.inc ]
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store float %float.outer.lcssa, float* @F
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br label %for.end16
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for.end16: ; preds = %for.exit
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ret void
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}
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; PHI node in inner latch with multiple predecessors.
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; REMARK: Interchanged
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; REMARK-NEXT: lcssa_05
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define void @lcssa_05(i32* %ptr) {
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entry:
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br label %outer.header
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outer.header: ; preds = %outer.inc, %entry
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%iv.outer = phi i64 [ 1, %entry ], [ %iv.outer.next, %outer.inc ]
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br label %for.body3
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for.body3: ; preds = %bb3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %bb3 ], [ 1, %outer.header ]
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br i1 undef, label %bb2, label %bb3
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bb2: ; preds = %for.body3
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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br label %bb3
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bb3: ; preds = %bb2, %for.body3
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%addp = phi i32 [ %add, %bb2 ], [ 0, %for.body3 ]
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store i32 %addp, i32* %ptr
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %bb3
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%iv.inner.lcssa = phi i64 [ %iv.inner, %bb3 ]
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%iv.inner.lcssa.lcssa = phi i64 [ %iv.inner.lcssa, %outer.inc ]
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store i64 %iv.inner.lcssa.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit
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ret void
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}
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; REMARK: UnsupportedExitPHI
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; REMARK-NEXT: lcssa_06
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define void @lcssa_06(i64* %ptr, i32* %ptr1) {
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entry:
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br label %outer.header
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outer.header: ; preds = %outer.inc, %entry
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%iv.outer = phi i64 [ 1, %entry ], [ %iv.outer.next, %outer.inc ]
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br i1 undef, label %for.body3, label %outer.inc
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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store i32 %add, i32* %ptr1
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.inc, label %for.body3
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outer.inc: ; preds = %for.body3, %outer.header
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%sv = phi i64 [ 0, %outer.header ], [ 1, %for.body3 ]
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%sv.lcssa = phi i64 [ %sv, %outer.inc ]
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store i64 %sv.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit
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ret void
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}
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; REMARK: Interchanged
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; REMARK-NEXT: lcssa_07
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define void @lcssa_07() {
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entry:
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br label %outer.header
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outer.header: ; preds = %outer.inc, %entry
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%iv.outer = phi i64 [ 1, %entry ], [ %iv.outer.next, %outer.inc ]
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br label %for.body3
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for.body3: ; preds = %for.body3, %outer.header
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%iv.inner = phi i64 [ %iv.inner.next, %for.body3 ], [ 1, %outer.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %iv.inner, i64 %iv.outer
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%vA = load i32, i32* %arrayidx5
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%arrayidx9 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @C, i64 0, i64 %iv.inner, i64 %iv.outer
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%vC = load i32, i32* %arrayidx9
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%add = add nsw i32 %vA, %vC
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store i32 %add, i32* %arrayidx5
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%exitcond = icmp eq i64 %iv.inner.next, 100
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br i1 %exitcond, label %outer.bb, label %for.body3
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outer.bb: ; preds = %for.body3
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%iv.inner.lcssa = phi i64 [ %iv.inner, %for.body3 ]
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br label %outer.inc
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outer.inc: ; preds = %outer.bb
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%iv.outer.next = add nsw i64 %iv.outer, 1
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%cmp = icmp eq i64 %iv.outer.next, 100
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br i1 %cmp, label %outer.header, label %for.exit
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for.exit: ; preds = %outer.inc
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%iv.inner.lcssa.lcssa = phi i64 [ %iv.inner.lcssa, %outer.inc ]
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store i64 %iv.inner.lcssa.lcssa, i64* @Y
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br label %for.end16
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for.end16: ; preds = %for.exit
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ret void
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}
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; Should not crash when the outer header branches to
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; both the inner loop and the outer latch, and there
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; is an lcssa phi node outside the loopnest.
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; REMARK: Interchanged
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; REMARK-NEXT: lcssa_08
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define i64 @lcssa_08([100 x [100 x i64]]* %Arr) {
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entry:
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br label %for1.header
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for1.header: ; preds = %for1.inc, %entry
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%indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc ]
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br i1 undef, label %for2, label %for1.inc
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for2: ; preds = %for2, %for1.header
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%indvars.iv = phi i64 [ 0, %for1.header ], [ %indvars.iv.next.3, %for2 ]
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%arrayidx = getelementptr inbounds [100 x [100 x i64]], [100 x [100 x i64]]* %Arr, i64 0, i64 %indvars.iv, i64 %indvars.iv23
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%lv = load i64, i64* %arrayidx, align 4
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%indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 1
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%exit1 = icmp eq i64 %indvars.iv.next.3, 100
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br i1 %exit1, label %for1.inc, label %for2
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for1.inc: ; preds = %for2, %for1.header
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%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
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%exit2 = icmp eq i64 %indvars.iv.next24, 100
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br i1 %exit2, label %for1.loopexit, label %for1.header
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for1.loopexit: ; preds = %for1.inc
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%sum.outer.lcssa = phi i64 [ %indvars.iv23, %for1.inc ]
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ret i64 %sum.outer.lcssa
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}
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