mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121945 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
1.5 KiB
LLVM
62 lines
1.5 KiB
LLVM
; RUN: opt -tbaa -licm -S < %s | FileCheck %s
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; LICM should be able to hoist the address load out of the loop
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; by using TBAA information.
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; CHECK: @foo
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; CHECK: entry:
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; CHECK-NEXT: %tmp3 = load double** @P, !tbaa !0
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; CHECK-NEXT: br label %for.body
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@P = common global double* null
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define void @foo(i64 %n) nounwind {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.07 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
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%tmp3 = load double** @P, !tbaa !1
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%scevgep = getelementptr double* %tmp3, i64 %i.07
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%tmp4 = load double* %scevgep, !tbaa !2
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%mul = fmul double %tmp4, 2.300000e+00
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store double %mul, double* %scevgep, !tbaa !2
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%inc = add i64 %i.07, 1
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%exitcond = icmp eq i64 %inc, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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!0 = metadata !{metadata !"root", null}
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!1 = metadata !{metadata !"pointer", metadata !0}
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!2 = metadata !{metadata !"double", metadata !0}
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; LICM shouldn't hoist anything here.
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; CHECK: @bar
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; CHECK: loop:
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; CHECK: load
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; CHECK: store
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; CHECK: load
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; CHECK: store
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; CHECK: br label %loop
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define void @bar(i8** %p) nounwind {
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entry:
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%q = bitcast i8** %p to i8*
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br label %loop
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loop:
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%tmp51 = load i8** %p, !tbaa !4
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store i8* %tmp51, i8** %p
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%tmp40 = load i8* %q, !tbaa !5
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store i8 %tmp40, i8* %q
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br label %loop
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}
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!3 = metadata !{metadata !"pointer", metadata !4}
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!4 = metadata !{metadata !"char", metadata !5}
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!5 = metadata !{metadata !"root", null}
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