2014-05-06 18:08:46 +08:00
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// RUN: %clang_cc1 -verify -fopenmp=libiomp5 -x c++ -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
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// RUN: %clang_cc1 -fopenmp=libiomp5 -x c++ -std=c++11 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
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// RUN: %clang_cc1 -fopenmp=libiomp5 -x c++ -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -g -std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck --check-prefix=CHECK-DEBUG %s
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// expected-no-diagnostics
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#ifndef HEADER
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#define HEADER
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// CHECK-DAG: %ident_t = type { i32, i32, i32, i32, i8* }
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// CHECK-DAG: %struct.anon = type { i32* }
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// CHECK-DAG: %struct.anon.0 = type { i8*** }
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2014-05-06 21:02:17 +08:00
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// CHECK-DAG: [[STR:@.+]] = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00"
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// CHECK-DAG: [[DEF_LOC_2:@.+]] = private unnamed_addr constant %ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8]* [[STR]], i32 0, i32 0) }
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-DAG: %ident_t = type { i32, i32, i32, i32, i8* }
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// CHECK-DEBUG-DAG: %struct.anon = type { i32* }
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// CHECK-DEBUG-DAG: %struct.anon.0 = type { i8*** }
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-DAG: [[STR:@.+]] = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00"
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// CHECK-DEBUG-DAG: [[DEF_LOC_2:@.+]] = private unnamed_addr constant %ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8]* [[STR]], i32 0, i32 0) }
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-DAG: [[LOC1:@.+]] = private unnamed_addr constant [{{.+}} x i8] c";{{.*}}parallel_codegen.cpp;main;[[@LINE+14]];9;;\00"
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// CHECK-DEBUG-DAG: [[LOC2:@.+]] = private unnamed_addr constant [{{.+}} x i8] c";{{.*}}parallel_codegen.cpp;tmain;[[@LINE+7]];9;;\00"
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template <class T>
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void foo(T argc) {}
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template <typename T>
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int tmain(T argc) {
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#pragma omp parallel
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foo(argc);
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return 0;
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}
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int main (int argc, char **argv) {
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#pragma omp parallel
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foo(argc);
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return tmain(argv);
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}
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2014-06-03 05:47:14 +08:00
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// CHECK-LABEL: define {{[a-z]*[ ]?i32}} @main({{i32[ ]?[a-z]*}} %argc, i8** %argv)
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2014-05-06 21:02:17 +08:00
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// CHECK: [[AGG_CAPTURED:%.+]] = alloca %struct.anon
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// CHECK: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon* [[AGG_CAPTURED]], i32 0, i32 0
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// CHECK-NEXT: store i32* {{%[a-z0-9.]+}}, i32** [[ARGC_REF]]
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// CHECK-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon* [[AGG_CAPTURED]] to i8*
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2014-10-08 22:01:46 +08:00
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// CHECK-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[DEF_LOC_2]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon*)* @.omp_outlined. to void (i32*, i32*, ...)*), i8* [[BITCAST]])
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2014-05-06 21:02:17 +08:00
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// CHECK-NEXT: [[ARGV:%.+]] = load i8*** {{%[a-z0-9.]+}}
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2014-06-03 05:47:14 +08:00
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// CHECK-NEXT: [[RET:%.+]] = call {{[a-z]*[ ]?i32}} [[TMAIN:@.+tmain.+]](i8** [[ARGV]])
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: ret i32 [[RET]]
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// CHECK-NEXT: }
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// CHECK-DEBUG-LABEL: define i32 @main(i32 %argc, i8** %argv)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-DAG: [[AGG_CAPTURED:%.+]] = alloca %struct.anon
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// CHECK-DEBUG-DAG: [[LOC_2_ADDR:%.+]] = alloca %ident_t
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// CHECK-DEBUG: [[KMPC_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[LOC_2_ADDR]] to i8*
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// CHECK-DEBUG-NEXT: [[KMPC_DEFAULT_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[DEF_LOC_2]] to i8*
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[KMPC_LOC_VOIDPTR]], i8* [[KMPC_DEFAULT_LOC_VOIDPTR]], i64 ptrtoint (%ident_t* getelementptr (%ident_t* null, i32 1) to i64), i32 8, i1 false)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon* [[AGG_CAPTURED]], i32 0, i32 0
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// CHECK-DEBUG-NEXT: store i32* {{%[a-z0-9.]+}}, i32** [[ARGC_REF]]
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// CHECK-DEBUG-NEXT: [[KMPC_LOC_PSOURCE_REF:%.+]] = getelementptr inbounds %ident_t* [[LOC_2_ADDR]], i32 0, i32 4
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: store i8* getelementptr inbounds ([{{.+}} x i8]* [[LOC1]], i32 0, i32 0), i8** [[KMPC_LOC_PSOURCE_REF]]
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon* [[AGG_CAPTURED]] to i8*
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2014-10-08 22:01:46 +08:00
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// CHECK-DEBUG-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[LOC_2_ADDR]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon*)* @.omp_outlined. to void (i32*, i32*, ...)*), i8* [[BITCAST]])
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-NEXT: [[ARGV:%.+]] = load i8*** {{%[a-z0-9.]+}}
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2014-05-07 15:02:29 +08:00
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// CHECK-DEBUG-NEXT: [[RET:%.+]] = call i32 [[TMAIN:@.+tmain.+]](i8** [[ARGV]])
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: ret i32 [[RET]]
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// CHECK-DEBUG-NEXT: }
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2014-10-08 22:01:46 +08:00
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// CHECK-LABEL: define internal void @.omp_outlined.(i32* %.global_tid., i32* %.bound_tid., %struct.anon* %__context)
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2014-05-06 21:02:17 +08:00
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// CHECK: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon*
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// CHECK: store %struct.anon* %__context, %struct.anon** [[CONTEXT_ADDR]]
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2014-05-08 12:33:26 +08:00
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// CHECK: [[CONTEXT_PTR:%.+]] = load %struct.anon** [[CONTEXT_ADDR]]
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon* [[CONTEXT_PTR]], i32 0, i32 0
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// CHECK-NEXT: [[ARGC_REF:%.+]] = load i32** [[ARGC_PTR_REF]]
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// CHECK-NEXT: [[ARGC:%.+]] = load i32* [[ARGC_REF]]
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2014-06-03 05:47:14 +08:00
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// CHECK-NEXT: invoke void [[FOO:@.+foo.+]](i32{{[ ]?[a-z]*}} [[ARGC]])
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2014-05-06 18:08:46 +08:00
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// CHECK: ret void
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Initial support for Win64 SEH IR emission
The lowering looks a lot like normal EH lowering, with the exception
that the exceptions are caught by executing filter expression code
instead of matching typeinfo globals. The filter expressions are
outlined into functions which are used in landingpad clauses where
typeinfo would normally go.
Major aspects that still need work:
- Non-call exceptions in __try bodies won't work yet. The plan is to
outline the __try block in the frontend to keep things simple.
- Filter expressions cannot use local variables until capturing is
implemented.
- __finally blocks will not run after exceptions. Fixing this requires
work in the LLVM SEH preparation pass.
The IR lowering looks like this:
// C code:
bool safe_div(int n, int d, int *r) {
__try {
*r = normal_div(n, d);
} __except(_exception_code() == EXCEPTION_INT_DIVIDE_BY_ZERO) {
return false;
}
return true;
}
; LLVM IR:
define i32 @filter(i8* %e, i8* %fp) {
%ehptrs = bitcast i8* %e to i32**
%ehrec = load i32** %ehptrs
%code = load i32* %ehrec
%matches = icmp eq i32 %code, i32 u0xC0000094
%matches.i32 = zext i1 %matches to i32
ret i32 %matches.i32
}
define i1 zeroext @safe_div(i32 %n, i32 %d, i32* %r) {
%rr = invoke i32 @normal_div(i32 %n, i32 %d)
to label %normal unwind to label %lpad
normal:
store i32 %rr, i32* %r
ret i1 1
lpad:
%ehvals = landingpad {i8*, i32} personality i32 (...)* @__C_specific_handler
catch i8* bitcast (i32 (i8*, i8*)* @filter to i8*)
%ehptr = extractvalue {i8*, i32} %ehvals, i32 0
%sel = extractvalue {i8*, i32} %ehvals, i32 1
%filter_sel = call i32 @llvm.eh.seh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filter to i8*))
%matches = icmp eq i32 %sel, %filter_sel
br i1 %matches, label %eh.except, label %eh.resume
eh.except:
ret i1 false
eh.resume:
resume
}
Reviewers: rjmccall, rsmith, majnemer
Differential Revision: http://reviews.llvm.org/D5607
llvm-svn: 226760
2015-01-22 09:36:17 +08:00
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// CHECK: call void @{{.+terminate.*|abort}}(
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: unreachable
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// CHECK-NEXT: }
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2014-10-08 22:01:46 +08:00
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// CHECK-DEBUG-LABEL: define internal void @.omp_outlined.(i32* %.global_tid., i32* %.bound_tid., %struct.anon* %__context)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon*
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// CHECK-DEBUG: store %struct.anon* %__context, %struct.anon** [[CONTEXT_ADDR]]
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// CHECK-DEBUG: [[CONTEXT_PTR:%.+]] = load %struct.anon** [[CONTEXT_ADDR]]
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon* [[CONTEXT_PTR]], i32 0, i32 0
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// CHECK-DEBUG-NEXT: [[ARGC_REF:%.+]] = load i32** [[ARGC_PTR_REF]]
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// CHECK-DEBUG-NEXT: [[ARGC:%.+]] = load i32* [[ARGC_REF]]
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2014-05-07 15:02:29 +08:00
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// CHECK-DEBUG-NEXT: invoke void [[FOO:@.+foo.+]](i32 [[ARGC]])
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG: ret void
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Initial support for Win64 SEH IR emission
The lowering looks a lot like normal EH lowering, with the exception
that the exceptions are caught by executing filter expression code
instead of matching typeinfo globals. The filter expressions are
outlined into functions which are used in landingpad clauses where
typeinfo would normally go.
Major aspects that still need work:
- Non-call exceptions in __try bodies won't work yet. The plan is to
outline the __try block in the frontend to keep things simple.
- Filter expressions cannot use local variables until capturing is
implemented.
- __finally blocks will not run after exceptions. Fixing this requires
work in the LLVM SEH preparation pass.
The IR lowering looks like this:
// C code:
bool safe_div(int n, int d, int *r) {
__try {
*r = normal_div(n, d);
} __except(_exception_code() == EXCEPTION_INT_DIVIDE_BY_ZERO) {
return false;
}
return true;
}
; LLVM IR:
define i32 @filter(i8* %e, i8* %fp) {
%ehptrs = bitcast i8* %e to i32**
%ehrec = load i32** %ehptrs
%code = load i32* %ehrec
%matches = icmp eq i32 %code, i32 u0xC0000094
%matches.i32 = zext i1 %matches to i32
ret i32 %matches.i32
}
define i1 zeroext @safe_div(i32 %n, i32 %d, i32* %r) {
%rr = invoke i32 @normal_div(i32 %n, i32 %d)
to label %normal unwind to label %lpad
normal:
store i32 %rr, i32* %r
ret i1 1
lpad:
%ehvals = landingpad {i8*, i32} personality i32 (...)* @__C_specific_handler
catch i8* bitcast (i32 (i8*, i8*)* @filter to i8*)
%ehptr = extractvalue {i8*, i32} %ehvals, i32 0
%sel = extractvalue {i8*, i32} %ehvals, i32 1
%filter_sel = call i32 @llvm.eh.seh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filter to i8*))
%matches = icmp eq i32 %sel, %filter_sel
br i1 %matches, label %eh.except, label %eh.resume
eh.except:
ret i1 false
eh.resume:
resume
}
Reviewers: rjmccall, rsmith, majnemer
Differential Revision: http://reviews.llvm.org/D5607
llvm-svn: 226760
2015-01-22 09:36:17 +08:00
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// CHECK-DEBUG: call void @{{.+terminate.*|abort}}(
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: unreachable
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// CHECK-DEBUG-NEXT: }
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2014-06-03 05:47:14 +08:00
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// CHECK-DAG: define linkonce_odr void [[FOO]]({{i32[ ]?[a-z]*}} %argc)
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2014-05-06 18:08:46 +08:00
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// CHECK-DAG: declare void @__kmpc_fork_call(%ident_t*, i32, void (i32*, i32*, ...)*, ...)
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2014-05-07 15:02:29 +08:00
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// CHECK-DEBUG-DAG: define linkonce_odr void [[FOO]](i32 %argc)
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-DAG: declare void @__kmpc_fork_call(%ident_t*, i32, void (i32*, i32*, ...)*, ...)
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2014-06-03 05:47:14 +08:00
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// CHECK: define linkonce_odr {{[a-z]*[ ]?i32}} [[TMAIN]](i8** %argc)
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2014-05-06 21:02:17 +08:00
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// CHECK: [[AGG_CAPTURED:%.+]] = alloca %struct.anon.0
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// CHECK: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[AGG_CAPTURED]], i32 0, i32 0
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// CHECK-NEXT: store i8*** {{%[a-z0-9.]+}}, i8**** [[ARGC_REF]]
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// CHECK-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon.0* [[AGG_CAPTURED]] to i8*
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2014-10-08 22:01:46 +08:00
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// CHECK-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[DEF_LOC_2]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon.0*)* @.omp_outlined.1 to void (i32*, i32*, ...)*), i8* [[BITCAST]])
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: ret i32 0
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// CHECK-NEXT: }
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2014-05-07 15:02:29 +08:00
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// CHECK-DEBUG: define linkonce_odr i32 [[TMAIN]](i8** %argc)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-DAG: [[AGG_CAPTURED:%.+]] = alloca %struct.anon.0
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// CHECK-DEBUG-DAG: [[LOC_2_ADDR:%.+]] = alloca %ident_t
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// CHECK-DEBUG: [[KMPC_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[LOC_2_ADDR]] to i8*
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// CHECK-DEBUG-NEXT: [[KMPC_DEFAULT_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[DEF_LOC_2]] to i8*
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[KMPC_LOC_VOIDPTR]], i8* [[KMPC_DEFAULT_LOC_VOIDPTR]], i64 ptrtoint (%ident_t* getelementptr (%ident_t* null, i32 1) to i64), i32 8, i1 false)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[AGG_CAPTURED]], i32 0, i32 0
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2014-05-06 21:15:00 +08:00
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// CHECK-DEBUG-NEXT: store i8*** {{%[a-z0-9.]+}}, i8**** [[ARGC_REF]]
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-NEXT: [[KMPC_LOC_PSOURCE_REF:%.+]] = getelementptr inbounds %ident_t* [[LOC_2_ADDR]], i32 0, i32 4
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: store i8* getelementptr inbounds ([{{.+}} x i8]* [[LOC2]], i32 0, i32 0), i8** [[KMPC_LOC_PSOURCE_REF]]
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon.0* [[AGG_CAPTURED]] to i8*
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2014-10-08 22:01:46 +08:00
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// CHECK-DEBUG-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[LOC_2_ADDR]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon.0*)* @.omp_outlined.1 to void (i32*, i32*, ...)*), i8* [[BITCAST]])
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: ret i32 0
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// CHECK-DEBUG-NEXT: }
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2014-10-08 22:01:46 +08:00
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// CHECK-LABEL: define internal void @.omp_outlined.1(i32* %.global_tid., i32* %.bound_tid., %struct.anon.0* %__context)
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2014-05-06 21:02:17 +08:00
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// CHECK: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon.0*
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// CHECK: store %struct.anon.0* %__context, %struct.anon.0** [[CONTEXT_ADDR]]
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2014-05-08 12:33:26 +08:00
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// CHECK: [[CONTEXT_PTR:%.+]] = load %struct.anon.0** [[CONTEXT_ADDR]]
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[CONTEXT_PTR]], i32 0, i32 0
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// CHECK-NEXT: [[ARGC_REF:%.+]] = load i8**** [[ARGC_PTR_REF]]
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// CHECK-NEXT: [[ARGC:%.+]] = load i8*** [[ARGC_REF]]
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2014-05-07 15:02:29 +08:00
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// CHECK-NEXT: invoke void [[FOO1:@.+foo.+]](i8** [[ARGC]])
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2014-05-06 18:08:46 +08:00
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// CHECK: ret void
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Initial support for Win64 SEH IR emission
The lowering looks a lot like normal EH lowering, with the exception
that the exceptions are caught by executing filter expression code
instead of matching typeinfo globals. The filter expressions are
outlined into functions which are used in landingpad clauses where
typeinfo would normally go.
Major aspects that still need work:
- Non-call exceptions in __try bodies won't work yet. The plan is to
outline the __try block in the frontend to keep things simple.
- Filter expressions cannot use local variables until capturing is
implemented.
- __finally blocks will not run after exceptions. Fixing this requires
work in the LLVM SEH preparation pass.
The IR lowering looks like this:
// C code:
bool safe_div(int n, int d, int *r) {
__try {
*r = normal_div(n, d);
} __except(_exception_code() == EXCEPTION_INT_DIVIDE_BY_ZERO) {
return false;
}
return true;
}
; LLVM IR:
define i32 @filter(i8* %e, i8* %fp) {
%ehptrs = bitcast i8* %e to i32**
%ehrec = load i32** %ehptrs
%code = load i32* %ehrec
%matches = icmp eq i32 %code, i32 u0xC0000094
%matches.i32 = zext i1 %matches to i32
ret i32 %matches.i32
}
define i1 zeroext @safe_div(i32 %n, i32 %d, i32* %r) {
%rr = invoke i32 @normal_div(i32 %n, i32 %d)
to label %normal unwind to label %lpad
normal:
store i32 %rr, i32* %r
ret i1 1
lpad:
%ehvals = landingpad {i8*, i32} personality i32 (...)* @__C_specific_handler
catch i8* bitcast (i32 (i8*, i8*)* @filter to i8*)
%ehptr = extractvalue {i8*, i32} %ehvals, i32 0
%sel = extractvalue {i8*, i32} %ehvals, i32 1
%filter_sel = call i32 @llvm.eh.seh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filter to i8*))
%matches = icmp eq i32 %sel, %filter_sel
br i1 %matches, label %eh.except, label %eh.resume
eh.except:
ret i1 false
eh.resume:
resume
}
Reviewers: rjmccall, rsmith, majnemer
Differential Revision: http://reviews.llvm.org/D5607
llvm-svn: 226760
2015-01-22 09:36:17 +08:00
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// CHECK: call void @{{.+terminate.*|abort}}(
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2014-05-06 18:08:46 +08:00
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// CHECK-NEXT: unreachable
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// CHECK-NEXT: }
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2014-10-08 22:01:46 +08:00
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// CHECK-DEBUG-LABEL: define internal void @.omp_outlined.1(i32* %.global_tid., i32* %.bound_tid., %struct.anon.0* %__context)
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2014-05-06 21:02:17 +08:00
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// CHECK-DEBUG: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon.0*
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// CHECK-DEBUG: store %struct.anon.0* %__context, %struct.anon.0** [[CONTEXT_ADDR]]
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// CHECK-DEBUG: [[CONTEXT_PTR:%.+]] = load %struct.anon.0** [[CONTEXT_ADDR]]
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[CONTEXT_PTR]], i32 0, i32 0
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// CHECK-DEBUG-NEXT: [[ARGC_REF:%.+]] = load i8**** [[ARGC_PTR_REF]]
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// CHECK-DEBUG-NEXT: [[ARGC:%.+]] = load i8*** [[ARGC_REF]]
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2014-05-07 15:02:29 +08:00
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// CHECK-DEBUG-NEXT: invoke void [[FOO1:@.+foo.+]](i8** [[ARGC]])
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG: ret void
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Initial support for Win64 SEH IR emission
The lowering looks a lot like normal EH lowering, with the exception
that the exceptions are caught by executing filter expression code
instead of matching typeinfo globals. The filter expressions are
outlined into functions which are used in landingpad clauses where
typeinfo would normally go.
Major aspects that still need work:
- Non-call exceptions in __try bodies won't work yet. The plan is to
outline the __try block in the frontend to keep things simple.
- Filter expressions cannot use local variables until capturing is
implemented.
- __finally blocks will not run after exceptions. Fixing this requires
work in the LLVM SEH preparation pass.
The IR lowering looks like this:
// C code:
bool safe_div(int n, int d, int *r) {
__try {
*r = normal_div(n, d);
} __except(_exception_code() == EXCEPTION_INT_DIVIDE_BY_ZERO) {
return false;
}
return true;
}
; LLVM IR:
define i32 @filter(i8* %e, i8* %fp) {
%ehptrs = bitcast i8* %e to i32**
%ehrec = load i32** %ehptrs
%code = load i32* %ehrec
%matches = icmp eq i32 %code, i32 u0xC0000094
%matches.i32 = zext i1 %matches to i32
ret i32 %matches.i32
}
define i1 zeroext @safe_div(i32 %n, i32 %d, i32* %r) {
%rr = invoke i32 @normal_div(i32 %n, i32 %d)
to label %normal unwind to label %lpad
normal:
store i32 %rr, i32* %r
ret i1 1
lpad:
%ehvals = landingpad {i8*, i32} personality i32 (...)* @__C_specific_handler
catch i8* bitcast (i32 (i8*, i8*)* @filter to i8*)
%ehptr = extractvalue {i8*, i32} %ehvals, i32 0
%sel = extractvalue {i8*, i32} %ehvals, i32 1
%filter_sel = call i32 @llvm.eh.seh.typeid.for(i8* bitcast (i32 (i8*, i8*)* @filter to i8*))
%matches = icmp eq i32 %sel, %filter_sel
br i1 %matches, label %eh.except, label %eh.resume
eh.except:
ret i1 false
eh.resume:
resume
}
Reviewers: rjmccall, rsmith, majnemer
Differential Revision: http://reviews.llvm.org/D5607
llvm-svn: 226760
2015-01-22 09:36:17 +08:00
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// CHECK-DEBUG: call void @{{.+terminate.*|abort}}(
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2014-05-06 18:08:46 +08:00
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// CHECK-DEBUG-NEXT: unreachable
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// CHECK-DEBUG-NEXT: }
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2014-05-07 15:02:29 +08:00
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// CHECK: define linkonce_odr void [[FOO1]](i8** %argc)
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// CHECK-DEBUG: define linkonce_odr void [[FOO1]](i8** %argc)
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2014-05-06 18:08:46 +08:00
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#endif
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