c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
354 lines
12 KiB
C++
354 lines
12 KiB
C++
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fexceptions -fcxx-exceptions -fno-rtti | FileCheck -check-prefix WIN32 -check-prefix WIN32-O0 %s
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// RUN: %clang_cc1 -std=c++11 -emit-llvm -O3 -disable-llvm-passes %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fexceptions -fcxx-exceptions -fno-rtti | FileCheck -check-prefix WIN32 -check-prefix WIN32-O3 -check-prefix WIN32-LIFETIME %s
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struct A {
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A();
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~A();
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int a;
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};
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A getA();
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int TakesTwo(A a, A b);
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void HasEHCleanup() {
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TakesTwo(getA(), getA());
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}
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// With exceptions, we need to clean up at least one of these temporaries.
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// WIN32-LABEL: define dso_local void @"?HasEHCleanup@@YAXXZ"() {{.*}} {
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// WIN32: %[[base:.*]] = call ptr @llvm.stacksave.p0()
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// If this call throws, we have to restore the stack.
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// WIN32: call void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
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// If this call throws, we have to cleanup the first temporary.
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// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
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// If this call throws, we have to cleanup the stacksave.
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// WIN32: call noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
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// WIN32: call void @llvm.stackrestore
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// WIN32: ret void
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//
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// There should be one dtor call for unwinding from the second getA.
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// WIN32: cleanuppad
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// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-NOT: @"??1A@@QAE@XZ"
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// WIN32: }
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// This test verifies the fix for a crash that occurred after
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// fa87fa97fb79.
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void HasEHCleanupNoexcept() noexcept {
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TakesTwo(getA(), getA());
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}
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// With exceptions, we need to clean up at least one of these temporaries.
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// WIN32-LABEL: define dso_local void @"?HasEHCleanupNoexcept@@YAXXZ"() {{.*}} {
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// WIN32: %[[base:.*]] = call ptr @llvm.stacksave.p0()
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// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
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// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
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// WIN32: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
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// WIN32: call void @llvm.stackrestore
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// WIN32: ret void
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//
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// Since all the calls terminate, there should be no dtors on the unwind
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// WIN32: cleanuppad
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// WIN32-NOT: @"??1A@@QAE@XZ"
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// WIN32: }
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void TakeRef(const A &a);
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int HasDeactivatedCleanups() {
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return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A()));
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}
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// WIN32-LABEL: define dso_local noundef i32 @"?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
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// WIN32: %[[isactive:.*]] = alloca i1
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// WIN32: call ptr @llvm.stacksave.p0()
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// WIN32: %[[argmem:.*]] = alloca inalloca [[argmem_ty:<{ %struct.A, %struct.A }>]]
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// WIN32: %[[arg1:.*]] = getelementptr inbounds nuw [[argmem_ty]], ptr %[[argmem]], i32 0, i32 1
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// WIN32: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32: invoke void @"?TakeRef@@YAXABUA@@@Z"
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//
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// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %[[arg1]])
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// WIN32: store i1 true, ptr %[[isactive]]
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//
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// WIN32: %[[arg0:.*]] = getelementptr inbounds nuw [[argmem_ty]], ptr %[[argmem]], i32 0, i32 0
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// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32: invoke void @"?TakeRef@@YAXABUA@@@Z"
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// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32: store i1 false, ptr %[[isactive]]
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//
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// WIN32: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"(ptr inalloca([[argmem_ty]]) %[[argmem]])
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// Destroy the two const ref temporaries.
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// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32: ret i32
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//
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// Conditionally destroy arg1.
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// WIN32: %[[cond:.*]] = load i1, ptr %[[isactive]]
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// WIN32: br i1 %[[cond]]
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// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"(ptr {{[^,]*}} %[[arg1]])
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// WIN32: }
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// Test putting the cleanups inside a conditional.
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int CouldThrow();
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int HasConditionalCleanup(bool cond) {
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return (cond ? TakesTwo(A(), A()) : CouldThrow());
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}
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// WIN32-LABEL: define dso_local noundef i32 @"?HasConditionalCleanup@@YAH_N@Z"(i1 noundef zeroext %{{.*}}) {{.*}} {
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// WIN32: store i1 false
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// WIN32: br i1
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// WIN32: call ptr @llvm.stacksave.p0()
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// WIN32: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
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// WIN32: store i1 true
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// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
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// WIN32: call noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
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//
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// WIN32: call void @llvm.stackrestore
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//
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// WIN32: call noundef i32 @"?CouldThrow@@YAHXZ"()
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//
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// Only one dtor in the invoke for arg1
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// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
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// WIN32: }
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// Now test both.
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int HasConditionalDeactivatedCleanups(bool cond) {
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return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow());
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}
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// WIN32-O0-LABEL: define dso_local noundef i32 @"?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
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// WIN32-O0: alloca i1
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// WIN32-O0: %[[arg1_cond:.*]] = alloca i1
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// Start all four cleanups as deactivated.
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// WIN32-O0: store i1 false
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// WIN32-O0: store i1 false
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// WIN32-O0: store i1 false
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// WIN32-O0: store i1 false
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// WIN32-O0: br i1
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// True condition.
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// WIN32-O0: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: invoke void @"?TakeRef@@YAXABUA@@@Z"
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// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O0: store i1 true, ptr %[[arg1_cond]]
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// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: invoke void @"?TakeRef@@YAXABUA@@@Z"
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// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: store i1 false, ptr %[[arg1_cond]]
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// WIN32-O0: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
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// False condition.
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// WIN32-O0: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
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// Two normal cleanups for TakeRef args.
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// WIN32-O0: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-O0-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
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// WIN32-O0: ret i32
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//
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// Somewhere in the landing pad soup, we conditionally destroy arg1.
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// WIN32-O0: %[[isactive:.*]] = load i1, ptr %[[arg1_cond]]
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// WIN32-O0: br i1 %[[isactive]]
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// WIN32-O0: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-O0: }
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// WIN32-O3-LABEL: define dso_local noundef i32 @"?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
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// WIN32-O3: alloca i1
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// WIN32-O3: alloca i1
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// WIN32-O3: %[[arg1_cond:.*]] = alloca i1
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// Start all four cleanups as deactivated.
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// WIN32-O3: store i1 false
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// WIN32-O3: store i1 false
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// WIN32-O3: store i1 false
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// WIN32-O3: store i1 false
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// WIN32-O3: store i1 false
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// WIN32-O3: store i1 false
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// WIN32-O3: br i1
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// True condition.
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// WIN32-O3: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: invoke void @"?TakeRef@@YAXABUA@@@Z"
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// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O3: store i1 true, ptr %[[arg1_cond]]
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// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: invoke void @"?TakeRef@@YAXABUA@@@Z"
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// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: store i1 false, ptr %[[arg1_cond]]
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// WIN32-O3: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
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// False condition.
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// WIN32-O3: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
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// Two normal cleanups for TakeRef args.
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// WIN32-O3: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-O3-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
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// WIN32-O3: ret i32
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//
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// Somewhere in the landing pad soup, we conditionally destroy arg1.
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// WIN32-O3: %[[isactive:.*]] = load i1, ptr %[[arg1_cond]]
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// WIN32-O3: br i1 %[[isactive]]
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// WIN32-O3: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
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// WIN32-O3: }
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namespace crash_on_partial_destroy {
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struct A {
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virtual ~A();
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};
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struct B : virtual A {
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// Has an implicit destructor.
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};
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struct C : B {
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C();
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};
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void foo();
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// We used to crash when emitting this.
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C::C() { foo(); }
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// Verify that we don't bother with a vbtable lookup when adjusting the this
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// pointer to call a base destructor from a constructor while unwinding.
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// WIN32-LABEL: define dso_local {{.*}} @"??0C@crash_on_partial_destroy@@QAE@XZ"{{.*}} {
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// WIN32: cleanuppad
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//
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// We shouldn't do any vbptr loads, just constant GEPs.
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// WIN32-NOT: load
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// WIN32: getelementptr i8, ptr %{{.*}}, i32 4
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// WIN32-NOT: load
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// WIN32: call x86_thiscallcc void @"??1B@crash_on_partial_destroy@@UAE@XZ"
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//
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// WIN32-NOT: load
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// WIN32-NOT: load
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// WIN32: getelementptr inbounds i8, ptr %{{.*}}, i32 4
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// WIN32-NOT: load
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// WIN32: call x86_thiscallcc void @"??1A@crash_on_partial_destroy@@UAE@XZ"({{.*}})
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// WIN32: }
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}
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namespace dont_call_terminate {
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struct C {
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~C();
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};
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void g();
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void f() {
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C c;
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g();
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}
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// WIN32-LABEL: define dso_local void @"?f@dont_call_terminate@@YAXXZ"()
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// WIN32: invoke void @"?g@dont_call_terminate@@YAXXZ"()
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// WIN32-NEXT: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
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//
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// WIN32: [[cont]]
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// WIN32: call x86_thiscallcc void @"??1C@dont_call_terminate@@QAE@XZ"({{.*}})
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//
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// WIN32: [[lpad]]
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// WIN32-NEXT: cleanuppad
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// WIN32: call x86_thiscallcc void @"??1C@dont_call_terminate@@QAE@XZ"({{.*}})
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}
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namespace noexcept_false_dtor {
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struct D {
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~D() noexcept(false);
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};
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void f() {
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D d;
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CouldThrow();
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}
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}
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// WIN32-LABEL: define dso_local void @"?f@noexcept_false_dtor@@YAXXZ"()
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// WIN32: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
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// WIN32: call x86_thiscallcc void @"??1D@noexcept_false_dtor@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
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// WIN32: cleanuppad
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// WIN32: call x86_thiscallcc void @"??1D@noexcept_false_dtor@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
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// WIN32: cleanupret
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namespace lifetime_marker {
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struct C {
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~C();
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};
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void g();
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void f() {
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C c;
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g();
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}
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// WIN32-LIFETIME-LABEL: define dso_local void @"?f@lifetime_marker@@YAXXZ"()
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// WIN32-LIFETIME: %[[c:.*]] = alloca %"struct.lifetime_marker::C"
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// WIN32-LIFETIME: call void @llvm.lifetime.start.p0(ptr %c)
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// WIN32-LIFETIME: invoke void @"?g@lifetime_marker@@YAXXZ"()
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// WIN32-LIFETIME-NEXT: to label %[[cont:[^ ]*]] unwind label %[[lpad0:[^ ]*]]
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//
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// WIN32-LIFETIME: [[cont]]
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// WIN32-LIFETIME: call x86_thiscallcc void @"??1C@lifetime_marker@@QAE@XZ"({{.*}})
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// WIN32-LIFETIME: call void @llvm.lifetime.end.p0(ptr %[[c]])
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//
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// WIN32-LIFETIME: [[lpad0]]
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// WIN32-LIFETIME-NEXT: cleanuppad
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// WIN32-LIFETIME: call x86_thiscallcc void @"??1C@lifetime_marker@@QAE@XZ"({{.*}})
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// WIN32-LIFETIME: cleanupret {{.*}} unwind label %[[lpad1:[^ ]*]]
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//
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// WIN32-LIFETIME: [[lpad1]]
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// WIN32-LIFETIME-NEXT: cleanuppad
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// WIN32-LIFETIME: call void @llvm.lifetime.end.p0(ptr %[[c]])
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}
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struct class_2 {
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class_2();
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virtual ~class_2();
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};
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struct class_1 : virtual class_2 {
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class_1(){throw "Unhandled exception";}
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virtual ~class_1() {}
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};
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struct class_0 : class_1 {
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class_0() ;
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virtual ~class_0() {}
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};
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class_0::class_0() {
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// WIN32: define dso_local x86_thiscallcc noundef ptr @"??0class_0@@QAE@XZ"(ptr {{[^,]*}} returned align 4 dereferenceable(4) %this, i32 noundef %is_most_derived)
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// WIN32: store i32 %is_most_derived, ptr %[[IS_MOST_DERIVED_VAR:.*]], align 4
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// WIN32: %[[IS_MOST_DERIVED_VAL:.*]] = load i32, ptr %[[IS_MOST_DERIVED_VAR]]
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// WIN32: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
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// WIN32: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
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// WIN32: [[INIT_VBASES]]
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// WIN32: br label %[[SKIP_VBASES]]
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// WIN32: [[SKIP_VBASES]]
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// ehcleanup:
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// WIN32: %[[CLEANUPPAD:.*]] = cleanuppad within none []
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// WIN32-NEXT: getelementptr inbounds i8, ptr %{{.*}}, i{{.*}} {{.}}
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// WIN32-NEXT: %[[SHOULD_CALL_VBASE_DTOR:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
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// WIN32-NEXT: br i1 %[[SHOULD_CALL_VBASE_DTOR]], label %[[DTOR_VBASE:.*]], label %[[SKIP_VBASE:.*]]
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// WIN32: [[DTOR_VBASE]]
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// WIN32-NEXT: call x86_thiscallcc void @"??1class_2@@UAE@XZ"
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// WIN32: br label %[[SKIP_VBASE]]
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// WIN32: [[SKIP_VBASE]]
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}
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namespace PR37146 {
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// Check that IRGen doesn't emit calls to synthesized destructors for
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// non-trival C structs.
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// WIN32: define dso_local void @"?test@PR37146@@YAXXZ"()
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// WIN32: call void @llvm.memset.p0.i32(
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// WIN32: call i32 @"?getS@PR37146@@YA?AUS@1@XZ"(
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// WIN32: call void @"?func@PR37146@@YAXUS@1@0@Z"(
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// WIN32-NEXT: ret void
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// WIN32-NEXT: {{^}$}}
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struct S {
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int f;
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};
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void func(S, S);
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S getS();
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void test() {
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func(getS(), S());
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}
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}
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