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fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
121 lines
2.2 KiB
C++
121 lines
2.2 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -Wno-unreachable-code -Werror -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
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int val = 42;
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int& test1() {
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return throw val, val;
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}
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int test2() {
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return val ? throw val : val;
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}
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// rdar://problem/8608801
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void test3() {
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throw false;
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}
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// PR10582
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int test4() {
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return 1 ? throw val : val;
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}
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// PR15923
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int test5(bool x, bool y, int z) {
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return (x ? throw 1 : y) ? z : throw 2;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z5test5bbi(
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// CHECK: br i1
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//
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// x.true:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// x.false:
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// CHECK: br i1
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//
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// y.true:
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// CHECK: load i32, i32*
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// CHECK: br label
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//
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// y.false:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// end:
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// CHECK: ret i32
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int test6(bool x, bool y, int z) {
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return (x ? throw 1 : y) ? z : (throw 2);
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z5test6bbi(
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// CHECK: br i1
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//
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// x.true:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// x.false:
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// CHECK: br i1
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//
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// y.true:
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// CHECK: load i32, i32*
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// CHECK: br label
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//
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// y.false:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// end:
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// CHECK: ret i32
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namespace DR1560 {
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struct A {
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~A();
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};
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extern bool b;
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A get();
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// CHECK-LABEL: @_ZN6DR15601bE
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const A &r = b ? get() : throw 0;
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// CHECK-NOT: call {{.*}}@_ZN6DR15601AD1Ev
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// CHECK: call {{.*}} @__cxa_atexit({{.*}} @_ZN6DR15601AD1Ev {{.*}} @_ZGRN6DR15601rE
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// CHECK-NOT: call {{.*}}@_ZN6DR15601AD1Ev
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// PR28184
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void conditional_throw() {
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int a;
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(true ? throw 0 : a) = 0; // CHECK: call void @__cxa_throw({{.*}})
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}
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test7b(
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void test7(bool cond) {
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// CHECK: br i1
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//
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// x.true:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// x.false:
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// CHECK: br label
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//
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// end:
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// CHECK: ret void
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cond ? throw test7 : val;
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}
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// CHECK-LABEL: define{{.*}} nonnull align 4 dereferenceable(4) i32* @_Z5test8b(
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int &test8(bool cond) {
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// CHECK: br i1
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//
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// x.true:
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// CHECK: br label
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//
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// x.false:
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// CHECK: call void @__cxa_throw(
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// CHECK-NEXT: unreachable
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//
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// end:
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// CHECK: ret i32* @val
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return cond ? val : ((throw "foo"));
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}
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