c79b544d2b
Current compler assert with `!SI->isAtomic() && !SI->isVolatile()' failed This due to following rule: First, no exception can move in or out of _try region., i.e., no "potential faulty instruction can be moved across _try boundary. Second, the order of exceptions for instructions 'directly' under a _try must be preserved (not applied to those in callees). Finally, global states (local/global/heap variables) that can be read outside of _try region must be updated in memory (not just in register) before the subsequent exception occurs. All memory instructions inside a _try are considered as 'volatile' to assure 2nd and 3rd rules for C-code above. This is a little sub-optimized. But it's acceptable as the amount of code directly under _try is very small. However during findDominatingStoreToReturnValue: those are not allowed. To fix just skip the assertion when current function has seh try.
93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
// RUN: %clang_cc1 -triple x86_64-windows -fasync-exceptions -fcxx-exceptions -fexceptions -fms-extensions -x c++ -Wno-implicit-function-declaration -S -emit-llvm %s -o - | FileCheck %s
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// CHECK-LABEL: @main()
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// CHECK: invoke void @llvm.seh.try.begin()
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// CHECK: invoke void @llvm.seh.try.begin()
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// CHECK: %[[src:[0-9-]+]] = load volatile i32, ptr %i
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// CHECK-NEXT: i32 noundef %[[src]]
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// CHECK: invoke void @llvm.seh.try.end()
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// CHECK: invoke void @llvm.seh.try.end()
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// CHECK: define internal void @"?fin$0@0@main@@"(i8 noundef %abnormal_termination
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// CHECK: invoke void @llvm.seh.try.begin()
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// CHECK: invoke void @llvm.seh.try.end()
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// *****************************************************************************
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// Abstract: Test __Try in __finally under SEH -EHa option
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void printf(...);
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int volatile *NullPtr = 0;
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int main() {
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for (int i = 0; i < 3; i++) {
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printf(" --- Test _Try in _finally --- i = %d \n", i);
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__try {
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__try {
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printf(" In outer _try i = %d \n", i);
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if (i == 0)
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*NullPtr = 0;
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} __finally {
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__try {
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printf(" In outer _finally i = %d \n", i);
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if (i == 1)
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*NullPtr = 0;
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} __finally {
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printf(" In Inner _finally i = %d \n", i);
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if (i == 2)
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*NullPtr = 0;
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}
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}
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} __except (1) {
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printf(" --- In outer except handler i = %d \n", i);
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}
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}
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return 0;
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}
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// CHECK-LABEL:@"?foo@@YAXXZ"()
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// CHECK: invoke.cont:
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// CHECK: invoke void @llvm.seh.try.begin()
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// CHECK: store volatile i32 1, ptr %cleanup.dest.slot
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// CHECK: invoke void @llvm.seh.try.end()
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// CHECK: invoke.cont2:
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// CHECK: %cleanup.dest = load i32, ptr %cleanup.dest.slot
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// CHECK: %1 = icmp ne i32 %cleanup.dest, 0
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// CHECK: %2 = zext i1 %1 to i8
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// CHECK: call void @"?fin$0@0@foo@@"(i8 noundef %2, ptr noundef %0)
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// CHECK: ehcleanup:
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// CHECK: call void @"?fin$0@0@foo@@"(i8 noundef 1, ptr noundef %4)
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void foo()
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{
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__try {
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return;
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}
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__finally {
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if (_abnormal_termination()) {
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printf("Passed\n");
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} else {
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printf("Failed\n");
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}
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}
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}
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// CHECK-LABEL:@"?bar@@YAHXZ"()
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// CHECK: invoke.cont:
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// CHECK: invoke void @llvm.seh.try.begin()
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// CHECK: invoke.cont1:
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// CHECK: store volatile i32 1, ptr %cleanup.dest.slot
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// CHECK: invoke void @llvm.seh.try.end()
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// CHECK: invoke.cont2:
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// CHECK: call void @"?fin$0@0@bar@@"
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// CHECK: %cleanup.dest3 = load i32, ptr %cleanup.dest.slot
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// CHECK: return:
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// CHECK: ret i32 11
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int bar()
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{
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int x;
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__try {
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return 11;
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} __finally {
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if (_abnormal_termination()) {
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x = 9;
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}
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}
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}
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