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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-27 16:34:19 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-27 16:34:19 +0000 |
| commit | ddc26d89362330995f59ad29eb8bb439a817050b (patch) | |
| tree | ed47f43030702a88de56fafdd8096f1b5e510926 /test/CodeGen/X86/crash.ll | |
| parent | 7149ef0176240ee5a09b0f6ad6300d1a966a31d1 (diff) | |
| download | external_llvm-ddc26d89362330995f59ad29eb8bb439a817050b.zip external_llvm-ddc26d89362330995f59ad29eb8bb439a817050b.tar.gz external_llvm-ddc26d89362330995f59ad29eb8bb439a817050b.tar.bz2 | |
Avoid dereferencing a NULL pointer.
Fixes PR13943.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164778 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/crash.ll')
| -rw-r--r-- | test/CodeGen/X86/crash.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/X86/crash.ll b/test/CodeGen/X86/crash.ll index 9badfc8..ae58041 100644 --- a/test/CodeGen/X86/crash.ll +++ b/test/CodeGen/X86/crash.ll @@ -442,3 +442,38 @@ entry: ret void } declare void @_Z6PrintFz(...) + +@a = external global i32, align 4 +@fn1.g = private unnamed_addr constant [9 x i32*] [i32* null, i32* @a, i32* null, i32* null, i32* null, i32* null, i32* null, i32* null, i32* null], align 16 +@e = external global i32, align 4 + +define void @pr13943() nounwind uwtable ssp { +entry: + %srcval = load i576* bitcast ([9 x i32*]* @fn1.g to i576*), align 16 + br label %for.cond + +for.cond: ; preds = %for.inc, %entry + %g.0 = phi i576 [ %srcval, %entry ], [ %ins, %for.inc ] + %0 = load i32* @e, align 4 + %1 = lshr i576 %g.0, 64 + %2 = trunc i576 %1 to i64 + %3 = inttoptr i64 %2 to i32* + %cmp = icmp eq i32* undef, %3 + %conv2 = zext i1 %cmp to i32 + %and = and i32 %conv2, %0 + tail call void (...)* @fn3(i32 %and) nounwind + %tobool = icmp eq i32 undef, 0 + br i1 %tobool, label %for.inc, label %if.then + +if.then: ; preds = %for.cond + ret void + +for.inc: ; preds = %for.cond + %4 = shl i576 %1, 384 + %mask = and i576 %g.0, -726838724295606890509921801691610055141362320587174446476410459910173841445449629921945328942266354949348255351381262292727973638307841 + %5 = and i576 %4, 726838724295606890509921801691610055141362320587174446476410459910173841445449629921945328942266354949348255351381262292727973638307840 + %ins = or i576 %5, %mask + br label %for.cond +} + +declare void @fn3(...) |