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fc8042a122
loop, making the resulting loop significantly less ugly. Also, zap its trivial PHI nodes, since it's easy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111255 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.9 KiB
LLVM
48 lines
1.9 KiB
LLVM
; RUN: opt -S %s -loop-rotate | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0"
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; PR5837
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define void @test(i32 %N, double* %G) nounwind ssp {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%j.0 = phi i64 [ 1, %entry ], [ %inc, %for.body ] ; <i64> [#uses=5]
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%cmp = icmp slt i64 %j.0, 1000 ; <i1> [#uses=1]
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%arrayidx = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1]
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%tmp3 = load double* %arrayidx ; <double> [#uses=1]
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%sub = sub i64 %j.0, 1 ; <i64> [#uses=1]
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%arrayidx6 = getelementptr inbounds double* %G, i64 %sub ; <double*> [#uses=1]
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%tmp7 = load double* %arrayidx6 ; <double> [#uses=1]
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%add = fadd double %tmp3, %tmp7 ; <double> [#uses=1]
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%arrayidx10 = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1]
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store double %add, double* %arrayidx10
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%inc = add nsw i64 %j.0, 1 ; <i64> [#uses=1]
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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; Should only end up with one phi. Also, the original for.cond block should
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; be moved to the end of the loop so that the new loop header pleasantly
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; ends up at the top.
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; CHECK: define void @test
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; CHECK-NEXT: entry:
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; CHECK-NEXT: icmp slt i64
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; CHECK-NEXT: br i1
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; CHECK-NOT: :
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; CHECK: bb.nph:
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; CHECK-NEXT: br label %for.body
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; CHECK-NOT: :
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; CHECK: for.body:
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; CHECK-NEXT: %j.02 = phi i64
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; CHECK-NOT: phi
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; CHECK: ret void
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; CHECK-NEXT: }
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