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0421ce7b22
was mistakenly classifying dynamic_casts which might throw as having no side effects. Switch it from a visitor to a switch, so it is kept up-to-date as future Expr nodes are added. Move it from ExprConstant.cpp to Expr.cpp, since it's not really related to constant expression evaluation. Since we use HasSideEffect to determine whether to emit an unused global with internal linkage, this has the effect of suppressing emission of globals in some cases. I've left many of the Objective-C cases conservatively assuming that the expression has side-effects. I'll leave it to someone with better knowledge of Objective-C than mine to improve them. llvm-svn: 161388
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -emit-llvm -o - %s -fexceptions -std=c++11 | FileCheck %s
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// CHECK-NOT: @unused
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auto unused = [](int i) { return i+1; };
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// CHECK: @used = internal global
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auto used = [](int i) { return i+1; };
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void *use = &used;
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// CHECK: @cvar = global
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extern "C" auto cvar = []{};
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int a() { return []{ return 1; }(); }
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// CHECK: define i32 @_Z1av
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// CHECK: call i32 @"_ZZ1avENK3$_0clEv"
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// CHECK: define internal i32 @"_ZZ1avENK3$_0clEv"
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// CHECK: ret i32 1
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int b(int x) { return [x]{return x;}(); }
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// CHECK: define i32 @_Z1bi
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// CHECK: store i32
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// CHECK: load i32*
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// CHECK: store i32
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// CHECK: call i32 @"_ZZ1biENK3$_1clEv"
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// CHECK: define internal i32 @"_ZZ1biENK3$_1clEv"
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// CHECK: load i32*
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// CHECK: ret i32
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int c(int x) { return [&x]{return x;}(); }
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// CHECK: define i32 @_Z1ci
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// CHECK: store i32
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// CHECK: store i32*
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// CHECK: call i32 @"_ZZ1ciENK3$_2clEv"
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// CHECK: define internal i32 @"_ZZ1ciENK3$_2clEv"
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// CHECK: load i32**
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// CHECK: load i32*
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// CHECK: ret i32
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struct D { D(); D(const D&); int x; };
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int d(int x) { D y[10]; [x,y] { return y[x].x; }(); }
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// CHECK: define i32 @_Z1di
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// CHECK: call void @_ZN1DC1Ev
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// CHECK: icmp ult i64 %{{.*}}, 10
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// CHECK: call void @_ZN1DC1ERKS_
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// CHECK: call i32 @"_ZZ1diENK3$_3clEv"
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// CHECK: define internal i32 @"_ZZ1diENK3$_3clEv"
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// CHECK: load i32*
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// CHECK: load i32*
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// CHECK: ret i32
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struct E { E(); E(const E&); ~E(); int x; };
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int e(E a, E b, bool cond) { [a,b,cond](){ return (cond ? a : b).x; }(); }
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// CHECK: define i32 @_Z1e1ES_b
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// CHECK: call void @_ZN1EC1ERKS_
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// CHECK: invoke void @_ZN1EC1ERKS_
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// CHECK: invoke i32 @"_ZZ1e1ES_bENK3$_4clEv"
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// CHECK: call void @"_ZZ1e1ES_bEN3$_4D1Ev"
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// CHECK: call void @"_ZZ1e1ES_bEN3$_4D1Ev"
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// CHECK: define internal i32 @"_ZZ1e1ES_bENK3$_4clEv"
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// CHECK: trunc i8
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// CHECK: load i32*
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// CHECK: ret i32
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void f() {
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// CHECK: define void @_Z1fv()
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// CHECK: @"_ZZ1fvENK3$_5cvPFiiiEEv"
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// CHECK-NEXT: store i32 (i32, i32)*
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// CHECK-NEXT: ret void
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int (*fp)(int, int) = [](int x, int y){ return x + y; };
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}
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// CHECK: define internal i32 @"_ZZ1fvEN3$_58__invokeEii"
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// CHECK: store i32
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// CHECK-NEXT: store i32
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// CHECK-NEXT: load i32*
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// CHECK-NEXT: load i32*
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// CHECK-NEXT: call i32 @"_ZZ1fvENK3$_5clEii"
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// CHECK-NEXT: ret i32
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// CHECK: define internal void @"_ZZ1e1ES_bEN3$_4D2Ev"
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