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| author | Andrew Trick <atrick@apple.com> | 2012-03-26 22:33:59 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-03-26 22:33:59 +0000 |
| commit | eb6dd23c95c1df08a4a924e2125158c5203b0991 (patch) | |
| tree | ba2d82e21364b4c09051f7e0e6a0d2499a3c13cd /test | |
| parent | 29a776b8242d63cafc3d26e8183fee13273fca2e (diff) | |
| download | llvm-eb6dd23c95c1df08a4a924e2125158c5203b0991.tar.gz llvm-eb6dd23c95c1df08a4a924e2125158c5203b0991.tar.bz2 llvm-eb6dd23c95c1df08a4a924e2125158c5203b0991.tar.xz | |
SCEV fix: Handle loop invariant loads.
Fixes PR11882: NULL dereference in ComputeLoadConstantCompareExitLimit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153480 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/ScalarEvolution/2012-03-26-LoadConstant.ll | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/2012-03-26-LoadConstant.ll b/test/Analysis/ScalarEvolution/2012-03-26-LoadConstant.ll new file mode 100644 index 0000000000..138c015f12 --- /dev/null +++ b/test/Analysis/ScalarEvolution/2012-03-26-LoadConstant.ll @@ -0,0 +1,47 @@ +; RUN: opt < %s -basicaa -globalopt -instcombine -loop-rotate -licm -instcombine -indvars -loop-deletion -constmerge -S +; PR11882: ComputeLoadConstantCompareExitLimit crash. +; +; for.body is deleted leaving a loop-invariant load. +; CHECK-NOT: for.body +target datalayout = "e-p:64:64:64-n32:64" + +@func_21_l_773 = external global i32, align 4 +@g_814 = external global i32, align 4 +@g_244 = internal global [1 x [0 x i32]] zeroinitializer, align 4 + +define void @func_21() nounwind uwtable ssp { +entry: + br label %lbl_818 + +lbl_818: ; preds = %for.end, %entry + call void (...)* @func_27() + store i32 0, i32* @g_814, align 4, !tbaa !0 + br label %for.cond + +for.cond: ; preds = %for.body, %lbl_818 + %0 = load i32* @g_814, align 4, !tbaa !0 + %cmp = icmp sle i32 %0, 0 + br i1 %cmp, label %for.body, label %for.end + +for.body: ; preds = %for.cond + %idxprom = sext i32 %0 to i64 + %arrayidx = getelementptr inbounds [0 x i32]* getelementptr inbounds ([1 x [0 x i32]]* @g_244, i32 0, i64 0), i32 0, i64 %idxprom + %1 = load i32* %arrayidx, align 1, !tbaa !0 + store i32 %1, i32* @func_21_l_773, align 4, !tbaa !0 + store i32 1, i32* @g_814, align 4, !tbaa !0 + br label %for.cond + +for.end: ; preds = %for.cond + %2 = load i32* @func_21_l_773, align 4, !tbaa !0 + %tobool = icmp ne i32 %2, 0 + br i1 %tobool, label %lbl_818, label %if.end + +if.end: ; preds = %for.end + ret void +} + +declare void @func_27(...) + +!0 = metadata !{metadata !"int", metadata !1} +!1 = metadata !{metadata !"omnipotent char", metadata !2} +!2 = metadata !{metadata !"Simple C/C++ TBAA", null} |