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https://github.com/capstone-engine/llvm-capstone.git
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8e57b07f66
from those that aren't. This patch changes the way __block variables that aren't captured by escaping blocks are handled: - Since non-escaping blocks on the stack never get copied to the heap (see https://reviews.llvm.org/D49303), Sema shouldn't error out when the type of a non-escaping __block variable doesn't have an accessible copy constructor. - IRGen doesn't have to use the specialized byref structure (see https://clang.llvm.org/docs/Block-ABI-Apple.html#id8) for a non-escaping __block variable anymore. Instead IRGen can emit the variable as a normal variable and copy the reference to the block literal. Byref copy/dispose helpers aren't needed either. This reapplies r343518 after fixing a use-after-free bug in function Sema::ActOnBlockStmtExpr where the BlockScopeInfo was dereferenced after it was popped and deleted. rdar://problem/39352313 Differential Revision: https://reviews.llvm.org/D51564 llvm-svn: 343542
82 lines
3.0 KiB
Objective-C
82 lines
3.0 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -fblocks -fexceptions -fobjc-exceptions -O2 -disable-llvm-passes -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -fblocks -fexceptions -fobjc-exceptions -disable-llvm-passes -o - %s | FileCheck -check-prefix=NO-METADATA %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -fblocks -fexceptions -fobjc-exceptions -O2 -disable-llvm-passes -o - %s -fobjc-arc-exceptions | FileCheck -check-prefix=NO-METADATA %s
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// The front-end should emit clang.arc.no_objc_arc_exceptions in -fobjc-arc-exceptions
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// mode when optimization is enabled, and not otherwise.
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void thrower(void);
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void not(void) __attribute__((nothrow));
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// CHECK-LABEL: define void @test0(
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// CHECK: call void @thrower(), !clang.arc.no_objc_arc_exceptions !
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// CHECK: call void @not() [[NUW:#[0-9]+]], !clang.arc.no_objc_arc_exceptions !
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// NO-METADATA-LABEL: define void @test0(
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// NO-METADATA-NOT: !clang.arc.no_objc_arc_exceptions
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// NO-METADATA: }
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void test0(void) {
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thrower();
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not();
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}
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// CHECK-LABEL: define void @test1(
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// CHECK: call void @thrower(), !clang.arc.no_objc_arc_exceptions !
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// CHECK: call void @not() [[NUW]], !clang.arc.no_objc_arc_exceptions !
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// NO-METADATA-LABEL: define void @test1(
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// NO-METADATA-NOT: !clang.arc.no_objc_arc_exceptions
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// NO-METADATA: }
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void test1(id x) {
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id y = x;
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thrower();
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not();
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}
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void NSLog(id, ...);
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// CHECK-LABEL: define void @test2(
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// CHECK: invoke void (i8*, ...) @NSLog(i8* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_ to i8*), i32* %{{.*}})
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// CHECK: to label %{{.*}} unwind label %{{.*}}, !clang.arc.no_objc_arc_exceptions !
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// NO-METADATA-LABEL: define void @test2(
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// NO-METADATA-NOT: !clang.arc.no_objc_arc_exceptions
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// NO-METADATA: }
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void test2(void) {
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@autoreleasepool {
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__attribute__((__blocks__(byref))) int x;
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^{ (void)x; };
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NSLog(@"Address of x outside of block: %p", &x);
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}
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}
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// CHECK-LABEL: define void @test3(
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// CHECK: invoke void %{{.*}}(i8* %{{.*}})
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// CHECK: to label %{{.*}} unwind label %{{.*}}, !clang.arc.no_objc_arc_exceptions !
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// NO-METADATA-LABEL: define void @test3(
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// NO-METADATA-NOT: !clang.arc.no_objc_arc_exceptions
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// NO-METADATA: }
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void test3(void) {
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@autoreleasepool {
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__attribute__((__blocks__(byref))) int x;
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^{
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NSLog(@"Address of x in non-assigned block: %p", &x);
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}();
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}
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}
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// CHECK-LABEL: define void @test4(
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// CHECK: invoke void %{{.*}}(i8* %{{.*}})
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// CHECK: to label %{{.*}} unwind label %{{.*}}, !clang.arc.no_objc_arc_exceptions !
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// NO-METADATA-LABEL: define void @test4(
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// NO-METADATA-NOT: !clang.arc.no_objc_arc_exceptions
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// NO-METADATA: }
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void test4(void) {
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@autoreleasepool {
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__attribute__((__blocks__(byref))) int x;
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void (^b)(void) = ^{
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NSLog(@"Address of x in assigned block: %p", &x);
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};
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b();
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}
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}
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// CHECK: attributes [[NUW]] = { nounwind }
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