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f193bcc701
This reverts the following commits: 37ca7a795b277c20c02a218bf44052278c03344b 9aa6c72b92b6c89cc6d23b693257df9af7de2d15 705387c5074bcca36d626882462ebbc2bcc3bed4 8ca4b3ef19fe82d7ad6a6e1515317dcc01b41515 80dba72a669b5416e97a42fd2c2a7bc5a6d3f44a
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-msvc -o - | FileCheck %s
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// Statement allow the user to exit the evaluation scope of a CallExpr without
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// executing the call. Check that clang generates reasonable IR for that case.
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// Not trivially copyable, subject to inalloca.
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struct Foo {
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int x;
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Foo();
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~Foo();
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};
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void inalloca(Foo x, Foo y);
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// PR25102: In this case, clang attempts to clean up unreachable blocks *during*
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// IR generation. inalloca defers some RAUW operations to the end of codegen,
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// and those references would become stale when the unreachable call to
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// 'inalloca' got deleted.
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extern "C" void pr25102() {
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inalloca(Foo(), ({
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goto out;
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Foo();
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}));
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out:;
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}
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// CHECK-LABEL: define dso_local void @pr25102()
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// CHECK: br label %out
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// CHECK: out:
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// CHECK: ret void
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bool cond();
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extern "C" void seqAbort() {
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inalloca(Foo(), ({
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if (cond())
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goto out;
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Foo();
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}));
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out:;
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}
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// FIXME: This can cause a stack leak. We should really have a "normal" cleanup
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// that goto branches through.
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// CHECK-LABEL: define dso_local void @seqAbort()
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// CHECK: alloca inalloca <{ %struct.Foo, %struct.Foo }>
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// CHECK: call zeroext i1 @"?cond@@YA_NXZ"()
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// CHECK: br i1
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// CHECK: br label %out
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// CHECK: call void @"?inalloca@@YAXUFoo@@0@Z"(<{ %struct.Foo, %struct.Foo }>* inalloca(<{ %struct.Foo, %struct.Foo }>) %{{.*}})
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// CHECK: call void @llvm.stackrestore(i8* %inalloca.save)
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// CHECK: out:
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