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| author | Chris Lattner <sabre@nondot.org> | 2012-12-31 08:37:17 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2012-12-31 08:37:17 +0000 |
| commit | 503fc1c488f6c67cabe565bdc979dcd4d889ebd3 (patch) | |
| tree | 2bb5e90ca10b416c6a9dba800fdc9adcd6e75c1d /test/Transforms/LICM | |
| parent | 240b9b1d80ae237805e8b5ec8280c139f7455b60 (diff) | |
Fix LICM's memory promotion optimization to preserve TBAA tags when
promoting a store in a loop. This was noticed when working on PR14753,
but isn't directly related.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171281 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LICM')
| -rw-r--r-- | test/Transforms/LICM/scalar_promote.ll | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/test/Transforms/LICM/scalar_promote.ll b/test/Transforms/LICM/scalar_promote.ll index 05a64d6322..e913e0a3bd 100644 --- a/test/Transforms/LICM/scalar_promote.ll +++ b/test/Transforms/LICM/scalar_promote.ll @@ -1,4 +1,4 @@ -; RUN: opt < %s -basicaa -licm -S | FileCheck %s +; RUN: opt < %s -basicaa -tbaa -licm -S | FileCheck %s target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" @X = global i32 7 ; <i32*> [#uses=4] @@ -134,7 +134,7 @@ Loop: ; preds = %Loop, %0 store i32 %x2, i32* @X store volatile i32* @X, i32** %P2 - + %Next = add i32 %j, 1 ; <i32> [#uses=2] %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1] br i1 %cond, label %Out, label %Loop @@ -148,3 +148,41 @@ Out: } +; PR14753 - Preserve TBAA tags when promoting values in a loop. +define void @test6(i32 %n, float* nocapture %a, i32* %gi) { +entry: + store i32 0, i32* %gi, align 4, !tbaa !0 + %cmp1 = icmp slt i32 0, %n + br i1 %cmp1, label %for.body.lr.ph, label %for.end + +for.body.lr.ph: ; preds = %entry + br label %for.body + +for.body: ; preds = %for.body.lr.ph, %for.body + %storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] + %idxprom = sext i32 %storemerge2 to i64 + %arrayidx = getelementptr inbounds float* %a, i64 %idxprom + store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3 + %0 = load i32* %gi, align 4, !tbaa !0 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* %gi, align 4, !tbaa !0 + %cmp = icmp slt i32 %inc, %n + br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge + +for.cond.for.end_crit_edge: ; preds = %for.body + br label %for.end + +for.end: ; preds = %for.cond.for.end_crit_edge, %entry + ret void + +; CHECK: for.body.lr.ph: +; CHECK-NEXT: %gi.promoted = load i32* %gi, align 4, !tbaa !0 +; CHECK: for.cond.for.end_crit_edge: +; CHECK-NEXT: store i32 %inc, i32* %gi, align 4, !tbaa !0 +} + +!0 = metadata !{metadata !"int", metadata !1} +!1 = metadata !{metadata !"omnipotent char", metadata !2} +!2 = metadata !{metadata !"Simple C/C++ TBAA"} +!3 = metadata !{metadata !"float", metadata !1} + |