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Merging r213726:
------------------------------------------------------------------------ r213726 | nicholas | 2014-07-22 23:24:49 -0700 (Tue, 22 Jul 2014) | 2 lines We may visit a call that uses an alloca multiple times in callUsesLocalStack, sometimes with IsNocapture true and sometimes with IsNocapture false. We accidentally skipped work we needed to do in the IsNocapture=false case if we were called with IsNocapture=true the first time. Fixes PR20405! ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@214688 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -227,12 +227,10 @@ struct AllocaDerivedValueTracker {
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}
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}
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void callUsesLocalStack(CallSite CS, bool IsNocapture) {
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void callUsesLocalStack(CallSite CS, bool IsNocapture) {
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// Add it to the list of alloca users. If it's already there, skip further
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// Add it to the list of alloca users.
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// processing.
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AllocaUsers.insert(CS.getInstruction());
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if (!AllocaUsers.insert(CS.getInstruction()))
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return;
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// If it's nocapture then it can't capture the alloca.
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// If it's nocapture then it can't capture this alloca.
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if (IsNocapture)
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if (IsNocapture)
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return;
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return;
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@ -174,3 +174,17 @@ if.end:
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return:
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return:
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ret void
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ret void
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}
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}
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declare void @test11_helper1(i8** nocapture, i8*)
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declare void @test11_helper2(i8*)
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define void @test11() {
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; CHECK-LABEL: @test11
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; CHECK-NOT: tail
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%a = alloca i8*
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%b = alloca i8
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call void @test11_helper1(i8** %a, i8* %b) ; a = &b
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%c = load i8** %a
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call void @test11_helper2(i8* %c)
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; CHECK: call void @test11_helper2
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ret void
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}
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