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| -rw-r--r-- | test/Analysis/TypeBasedAliasAnalysis/licm.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Analysis/TypeBasedAliasAnalysis/licm.ll b/test/Analysis/TypeBasedAliasAnalysis/licm.ll new file mode 100644 index 0000000..eedc1e8 --- /dev/null +++ b/test/Analysis/TypeBasedAliasAnalysis/licm.ll @@ -0,0 +1,33 @@ +; RUN: opt -tbaa -licm -enable-tbaa -S < %s | FileCheck %s + +; LICM should be able to hoist the address load out of the loop +; by using TBAA information. + +; CHECK: entry: +; CHECK-NEXT: %tmp3 = load double** @P, !tbaa !0 +; CHECK-NEXT: br label %for.body + +@P = common global double* null + +define void @foo(i64 %n) nounwind { +entry: + br label %for.body + +for.body: ; preds = %entry, %for.body + %i.07 = phi i64 [ %inc, %for.body ], [ 0, %entry ] + %tmp3 = load double** @P, !tbaa !1 + %scevgep = getelementptr double* %tmp3, i64 %i.07 + %tmp4 = load double* %scevgep, !tbaa !2 + %mul = fmul double %tmp4, 2.300000e+00 + store double %mul, double* %scevgep, !tbaa !2 + %inc = add i64 %i.07, 1 + %exitcond = icmp eq i64 %inc, %n + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body, %entry + ret void +} + +!0 = metadata !{metadata !"root", null} +!1 = metadata !{metadata !"pointer", metadata !0} +!2 = metadata !{metadata !"double", metadata !0} |