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https://github.com/Gericom/teak-llvm.git
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ba0367a708
body of global block invoke functions.
This commit fixes an infinite loop in IRGen that occurs when compiling
the following code:
void FUNC2() {
static void (^const block1)(int) = ^(int a){
if (a--)
block1(a);
};
}
This is how IRGen gets stuck in the infinite loop:
1. GenerateBlockFunction is called to emit the body of "block1".
2. GetAddrOfGlobalBlock is called to get the address of "block1". The
function calls getAddrOfGlobalBlockIfEmitted to check whether the
global block has been emitted. If it hasn't been emitted, it then
tries to emit the body of the block function by calling
GenerateBlockFunction, which goes back to step 1.
This commit prevents the inifinite loop by building the global block in
GenerateBlockFunction before emitting the body of the block function.
rdar://problem/34541684
Differential Revision: https://reviews.llvm.org/D38118
llvm-svn: 314029
77 lines
2.2 KiB
Objective-C
77 lines
2.2 KiB
Objective-C
// RUN: %clang_cc1 -fblocks -triple x86_64-apple-darwin -fobjc-runtime=macosx-fragile-10.5 -emit-llvm %s -o %t-64.ll
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// RUN: FileCheck -check-prefix CHECK-LP64 --input-file=%t-64.ll %s
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// rdar: // 8390455
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@class NSArray;
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static NSArray *(^ArrayRecurs)(NSArray *addresses, unsigned long level) = ^(NSArray *addresses, unsigned long level) {
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for(id rawAddress in addresses)
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{
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NSArray *separatedAddresses = ((NSArray*)0);
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separatedAddresses = ArrayRecurs((NSArray *)rawAddress, level+1);
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}
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return (NSArray *)0;
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};
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extern NSArray *address;
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extern unsigned long level;
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void FUNC()
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{
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ArrayRecurs(address, level);
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static NSArray *(^ArrayRecurs)(NSArray *addresses, unsigned long level) = ^(NSArray *addresses, unsigned long level) {
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for(id rawAddress in addresses)
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{
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NSArray *separatedAddresses = ((NSArray*)0);
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separatedAddresses = ArrayRecurs((NSArray *)rawAddress, level+1);
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}
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return (NSArray *)0;
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};
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ArrayRecurs(address, level);
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if (ArrayRecurs) {
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static NSArray *(^ArrayRecurs)(NSArray *addresses, unsigned long level) = ^(NSArray *addresses, unsigned long level) {
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for(id rawAddress in addresses)
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{
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NSArray *separatedAddresses = ((NSArray*)0);
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separatedAddresses = ArrayRecurs((NSArray *)rawAddress, level+1);
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}
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return (NSArray *)0;
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};
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ArrayRecurs(address, level);
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}
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}
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void FUNC2() {
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static void (^const block1)(int) = ^(int a){
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if (a--)
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block1(a);
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};
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}
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// CHECK-LABEL-LP64: define void @FUNC2(
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// CHECK: define internal void @_block_invoke{{.*}}(
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// CHECK: call void %{{.*}}(i8* bitcast ({ i8**, i32, i32, i8*, %struct.__block_descriptor* }* @__block_literal_global{{.*}} to i8*), i32 %{{.*}})
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void FUNC1()
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{
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static NSArray *(^ArrayRecurs)(NSArray *addresses, unsigned long level) = ^(NSArray *addresses, unsigned long level) {
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for(id rawAddress in addresses)
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{
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NSArray *separatedAddresses = ((NSArray*)0);
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separatedAddresses = ArrayRecurs((NSArray *)rawAddress, level+1);
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}
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return (NSArray *)0;
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};
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ArrayRecurs(address, level);
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}
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// CHECK-LP64: @ArrayRecurs = internal global
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// CHECK-LP64: @FUNC.ArrayRecurs = internal global
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// CHECK-LP64: @FUNC.ArrayRecurs.1 = internal global
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// CHECK-LP64: @FUNC1.ArrayRecurs = internal global
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