93786da2cb
Much to my surprise, '-disable-llvm-optzns' which I thought was the magical flag I wanted to get at the raw LLVM IR coming out of Clang deosn't do that. It still runs some passes over the IR. I don't want that, I really want the *raw* IR coming out of Clang and I strongly suspect everyone else using it is in the same camp. There is actually a flag that does what I want that I didn't know about called '-disable-llvm-passes'. I suspect many others don't know about it either. It both does what I want and is much simpler. This removes the confusing version and makes that spelling of the flag an alias for '-disable-llvm-passes'. I've also moved everything in Clang to use the 'passes' spelling as it seems both more accurate (*all* LLVM passes are disabled, not just optimizations) and much easier to remember and spell correctly. This is part of simplifying how Clang drives LLVM to make it cleaner to wire up to the new pass manager. Differential Revision: https://reviews.llvm.org/D28047 llvm-svn: 290392
316 lines
12 KiB
C++
316 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 void @"\01?HasEHCleanup@@YAXXZ"() {{.*}} {
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// WIN32: %[[base:.*]] = call i8* @llvm.stacksave()
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// If this call throws, we have to restore the stack.
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// WIN32: call void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
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// If this call throws, we have to cleanup the first temporary.
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// WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
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// If this call throws, we have to cleanup the stacksave.
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// WIN32: call i32 @"\01?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 @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32-NOT: @"\01??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 i32 @"\01?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
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// WIN32: %[[isactive:.*]] = alloca i1
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// WIN32: call i8* @llvm.stacksave()
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// WIN32: %[[argmem:.*]] = alloca inalloca [[argmem_ty:<{ %struct.A, %struct.A }>]]
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// WIN32: %[[arg1:.*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 1
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// WIN32: call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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//
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// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1]])
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// WIN32: store i1 true, i1* %[[isactive]]
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//
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// WIN32: %[[arg0:.*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 0
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// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32: store i1 false, i1* %[[isactive]]
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//
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// WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"([[argmem_ty]]* inalloca %[[argmem]])
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// Destroy the two const ref temporaries.
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// WIN32: call x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32: call x86_thiscallcc void @"\01??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, i1* %[[isactive]]
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// WIN32: br i1 %[[cond]]
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// WIN32: call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[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 i32 @"\01?HasConditionalCleanup@@YAH_N@Z"(i1 zeroext %{{.*}}) {{.*}} {
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// WIN32: store i1 false
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// WIN32: br i1
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// WIN32: call i8* @llvm.stacksave()
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// WIN32: call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
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// WIN32: store i1 true
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// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
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// WIN32: call i32 @"\01?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 i32 @"\01?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 @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32-NOT: invoke x86_thiscallcc void @"\01??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 i32 @"\01?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 %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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// WIN32-O0: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O0: store i1 true, i1* %[[arg1_cond]]
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// WIN32-O0: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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// WIN32-O0: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O0: store i1 true
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// WIN32-O0: store i1 false, i1* %[[arg1_cond]]
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// WIN32-O0: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
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// False condition.
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// WIN32-O0: invoke i32 @"\01?CouldThrow@@YAHXZ"()
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// Two normal cleanups for TakeRef args.
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// WIN32-O0: call x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32-O0-NOT: invoke x86_thiscallcc void @"\01??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, i1* %[[arg1_cond]]
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// WIN32-O0: br i1 %[[isactive]]
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// WIN32-O0: call x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32-O0: }
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// WIN32-O3-LABEL: define i32 @"\01?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 %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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// WIN32-O3: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O3: store i1 true, i1* %[[arg1_cond]]
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// WIN32-O3: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
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// WIN32-O3: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
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// WIN32-O3: store i1 true
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// WIN32-O3: store i1 false, i1* %[[arg1_cond]]
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// WIN32-O3: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
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// False condition.
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// WIN32-O3: invoke i32 @"\01?CouldThrow@@YAHXZ"()
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// Two normal cleanups for TakeRef args.
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// WIN32-O3: call x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
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// WIN32-O3-NOT: invoke x86_thiscallcc void @"\01??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, i1* %[[arg1_cond]]
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// WIN32-O3: br i1 %[[isactive]]
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// WIN32-O3: call x86_thiscallcc void @"\01??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 {{.*}} @"\01??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, i8* %{{.*}}, i32 4
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// WIN32-NOT: load
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// WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::B"*
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// WIN32: call x86_thiscallcc void @"\01??1B@crash_on_partial_destroy@@UAE@XZ"
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//
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// WIN32-NOT: load
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// WIN32: bitcast %"struct.crash_on_partial_destroy::C"* %{{.*}} to i8*
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// WIN32-NOT: load
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// WIN32: getelementptr inbounds i8, i8* %{{.*}}, i32 4
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// WIN32-NOT: load
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// WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::A"*
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// WIN32: call x86_thiscallcc void @"\01??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 void @"\01?f@dont_call_terminate@@YAXXZ"()
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// WIN32: invoke void @"\01?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 @"\01??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 @"\01??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 void @"\01?f@noexcept_false_dtor@@YAXXZ"()
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// WIN32: invoke i32 @"\01?CouldThrow@@YAHXZ"()
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// WIN32: call x86_thiscallcc void @"\01??1D@noexcept_false_dtor@@QAE@XZ"(%"struct.noexcept_false_dtor::D"* %{{.*}})
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// WIN32: cleanuppad
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// WIN32: call x86_thiscallcc void @"\01??1D@noexcept_false_dtor@@QAE@XZ"(%"struct.noexcept_false_dtor::D"* %{{.*}})
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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 void @"\01?f@lifetime_marker@@YAXXZ"()
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// WIN32-LIFETIME: %[[c:.*]] = alloca %"struct.lifetime_marker::C"
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// WIN32-LIFETIME: %[[bc0:.*]] = bitcast %"struct.lifetime_marker::C"* %c to i8*
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// WIN32-LIFETIME: call void @llvm.lifetime.start(i64 1, i8* %[[bc0]])
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// WIN32-LIFETIME: invoke void @"\01?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 @"\01??1C@lifetime_marker@@QAE@XZ"({{.*}})
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// WIN32-LIFETIME: %[[bc1:.*]] = bitcast %"struct.lifetime_marker::C"* %[[c]] to i8*
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// WIN32-LIFETIME: call void @llvm.lifetime.end(i64 1, i8* %[[bc1]])
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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 @"\01??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: %[[bc2:.*]] = bitcast %"struct.lifetime_marker::C"* %[[c]] to i8*
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// WIN32-LIFETIME: call void @llvm.lifetime.end(i64 1, i8* %[[bc2]])
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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 x86_thiscallcc %struct.class_0* @"\01??0class_0@@QAE@XZ"(%struct.class_0* returned %this, i32 %is_most_derived)
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// WIN32: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4
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// WIN32: %[[IS_MOST_DERIVED_VAL:.*]] = load i32, i32* %[[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: bitcast %{{.*}}* %{{.*}} to i8*
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// WIN32-NEXT: getelementptr inbounds i8, i8* %{{.*}}, i{{.*}} {{.}}
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// WIN32-NEXT: bitcast i8* %{{.*}} to %{{.*}}*
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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 @"\01??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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