derek.holloway
7502bf64a4
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66 lines
1.9 KiB
LLVM
66 lines
1.9 KiB
LLVM
; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -S -passes='require<globals-aa>,function(loop-mssa(licm))' | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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@b = common global i32 0, align 4
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@c = internal global i32 0, align 4
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@d = common global i32 0, align 4
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@e = common global ptr null, align 4
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define void @foo(ptr %P) noinline {
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; CHECK: define void @foo
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%loadp = load i32, ptr %P, align 4
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store i32 %loadp, ptr @d, align 4
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ret void
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}
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define void @bar() noinline {
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; CHECK: define void @bar
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%loadp = load i32, ptr @d, align 4
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store i32 %loadp, ptr @c, align 4
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ret void
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}
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define i32 @main() {
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entry:
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%retval = alloca i32, align 4
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%c = alloca [1 x i32], align 4
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store i32 0, ptr %retval, align 4
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call void @bar()
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store i32 0, ptr @b, align 4
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br label %for.cond
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;; Check that @c is LICM'ed out.
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; CHECK: load i32, ptr @c
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for.cond: ; preds = %for.inc, %entry
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; CHECK-LABEL: for.cond:
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; CHECK: load i32, ptr @b
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%a1 = load i32, ptr @b, align 4
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%aa2 = load i32, ptr @c, align 4
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%add = add nsw i32 %a1, %aa2
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%p1 = load ptr, ptr @e, align 4
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call void @foo(ptr %p1)
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%cmp = icmp slt i32 %add, 3
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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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%a2 = load i32, ptr @b, align 4
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%idxprom = sext i32 %a2 to i64
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br label %for.inc
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for.inc: ; preds = %for.body
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%a3 = load i32, ptr @b, align 4
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%inc = add nsw i32 %a3, 1
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store i32 %inc, ptr @b, align 4
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br label %for.cond
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for.end: ; preds = %for.cond
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ret i32 0
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}
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; Function Attrs: nounwind argmemonly
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind argmemonly
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; Function Attrs: noreturn nounwind
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declare void @abort() noreturn nounwind
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