[SEH] Port __try / __leave test to new IR

It turns out that the IR we already generate for __leave is fine, so no
code changes were needed.

llvm-svn: 247424

1 files changed, 347 insertions, 0 deletions

diff --git a/clang/test/CodeGen/exceptions-seh-leave-new.c b/clang/test/CodeGen/exceptions-seh-leave-new.c
new file mode 100644
index 00000000000..69c1a56bca9
--- /dev/null
+++ b/clang/test/CodeGen/exceptions-seh-leave-new.c
@@ -0,0 +1,347 @@
+// RUN: %clang_cc1 %s -triple x86_64-pc-win32 -fms-extensions -fnew-ms-eh -emit-llvm -o - | FileCheck %s
+
+void g(void);
+
+//////////////////////////////////////////////////////////////////////////////
+// __leave with __except
+
+// Nothing in the __try block can trap, so __try.cont isn't created.
+int __leave_with___except_simple() {
+  int myres = 0;
+  __try {
+    myres = 15;
+    __leave;
+    myres = 23;
+  } __except (1) {
+    return 0;
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @__leave_with___except_simple()
+// CHECK: store i32 15, i32* %myres
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+// CHECK: [[tryleave]]
+// CHECK-NEXT: ret i32 1
+
+
+// The "normal" case.
+int __leave_with___except() {
+  int myres = 0;
+  __try {
+    g();
+    __leave;
+    myres = 23;
+  } __except (1) {
+    return 0;
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @__leave_with___except()
+// CHECK: invoke void @g()
+// CHECK-NEXT:       to label %[[cont:.*]] unwind label %{{.*}}
+// For __excepts, instead of an explicit __try.__leave label, we could use
+// use invoke.cont as __leave jump target instead.  However, not doing this
+// keeps the CodeGen code simpler, __leave is very rare, and SimplifyCFG will
+// simplify this anyways.
+// CHECK: [[cont]]
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+// CHECK: [[tryleave]]
+// CHECK-NEXT: br label %
+
+
+//////////////////////////////////////////////////////////////////////////////
+// __leave with __finally
+
+void abort(void) __attribute__((noreturn));
+
+// Nothing in the __try block can trap, so __finally.cont and friends aren't
+// created.
+int __leave_with___finally_simple() {
+  int myres = 0;
+  __try {
+    myres = 15;
+    __leave;
+    myres = 23;
+  } __finally {
+    return 0;
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @__leave_with___finally_simple()
+// CHECK: store i32 15, i32* %myres
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+// CHECK: [[tryleave]]
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally_simple@@"(i8 0, i8* %[[fp]])
+
+// __finally block doesn't return, __finally.cont doesn't exist.
+int __leave_with___finally_noreturn() {
+  int myres = 0;
+  __try {
+    myres = 15;
+    __leave;
+    myres = 23;
+  } __finally {
+    abort();
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @__leave_with___finally_noreturn()
+// CHECK: store i32 15, i32* %myres
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+// CHECK: [[tryleave]]
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally_noreturn@@"(i8 0, i8* %[[fp]])
+
+// The "normal" case.
+int __leave_with___finally() {
+  int myres = 0;
+  __try {
+    g();
+    __leave;
+    myres = 23;
+  } __finally {
+    return 0;
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @__leave_with___finally()
+// CHECK: invoke void @g()
+// CHECK-NEXT:       to label %[[cont:.*]] unwind label %{{.*}}
+// For __finally, there needs to be an explicit __try.__leave, because
+// abnormal.termination.slot needs to be set there.
+// CHECK: [[cont]]
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+// CHECK: [[tryleave]]
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally@@"(i8 0, i8* %[[fp]])
+
+
+//////////////////////////////////////////////////////////////////////////////
+// Mixed, nested cases.
+
+int nested___except___finally() {
+  int myres = 0;
+  __try {
+    __try {
+      g();
+    } __finally {
+      g();
+      __leave;  // Refers to the outer __try, not the __finally!
+      myres = 23;
+      return 0;
+    }
+
+    myres = 51;
+  } __except (1) {
+  }
+  return 1;
+}
+// CHECK-LABEL: define i32 @nested___except___finally()
+
+// CHECK-LABEL: invoke void @g()
+// CHECK-NEXT:       to label %[[g1_cont1:.*]] unwind label %[[g1_lpad:.*]]
+
+// CHECK: [[g1_cont1]]
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___except___finally@@"(i8 0, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[fin_cont:.*]] unwind label %[[g2_lpad:.*]]
+
+// CHECK: [[fin_cont]]
+// CHECK: store i32 51, i32* %
+// CHECK-NEXT: br label %[[trycont:[^ ]*]]
+
+// CHECK: [[g1_lpad]]
+// CHECK-NEXT: cleanuppad
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___except___finally@@"(i8 1, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[g1_resume:.*]] unwind label %[[cleanupend:[^ ]*]]
+// CHECK: cleanupret {{.*}} unwind label %[[g2_lpad]]
+
+// CHECK: [[g2_lpad]]
+// CHECK: catchpad [i8* null]
+// CHECK: catchret
+// CHECK: br label %[[trycont]]
+
+// CHECK: [[trycont]]
+// CHECK-NEXT: ret i32 1
+
+// CHECK: [[cleanupend]]
+// CHECK-NEXT: cleanupendpad {{.*}} unwind label %[[g2_lpad]]
+
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___except___finally@@"(i8 %abnormal_termination, i8* %frame_pointer)
+// CHECK: call void @g()
+// CHECK: unreachable
+
+int nested___except___except() {
+  int myres = 0;
+  __try {
+    __try {
+      g();
+      myres = 16;
+    } __except (1) {
+      g();
+      __leave;  // Refers to the outer __try, not the __except we're in!
+      myres = 23;
+      return 0;
+    }
+
+    myres = 51;
+  } __except (1) {
+  }
+  return 1;
+}
+// The order of basic blocks in the below doesn't matter.
+// CHECK-LABEL: define i32 @nested___except___except()
+
+// CHECK-LABEL: invoke void @g()
+// CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
+
+// CHECK: [[g1_lpad]]
+// CHECK: catchpad [i8* null]
+// CHECK: catchret {{.*}} to label %[[except:[^ ]*]]
+// CHECK: [[except]]
+// CHECK: invoke void @g()
+// CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
+
+// CHECK: [[g2_lpad]]
+// CHECK: catchpad [i8* null]
+// CHECK: catchret
+// CHECK: br label %[[trycont4:[^ ]*]]
+
+// CHECK: [[trycont4]]
+// CHECK-NEXT: ret i32 1
+
+// CHECK: [[g2_cont]]
+// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: store i32 23
+
+// CHECK: [[g1_cont]]
+// CHECK: store i32 16, i32* %myres
+// CHECK-NEXT: br label %[[trycont:[^ ]*]]
+
+// CHECK: [[trycont]]
+// CHECK-NEXT: store i32 51, i32* %myres
+// CHECK-NEXT: br label %[[tryleave]]
+
+// CHECK: [[tryleave]]
+// CHECK-NEXT: br label %[[trycont4]]
+
+int nested___finally___except() {
+  int myres = 0;
+  __try {
+    __try {
+      g();
+    } __except (1) {
+      g();
+      __leave;  // Refers to the outer __try, not the __except!
+      myres = 23;
+      return 0;
+    }
+
+    myres = 51;
+  } __finally {
+  }
+  return 1;
+}
+// The order of basic blocks in the below doesn't matter.
+// CHECK-LABEL: define i32 @nested___finally___except()
+
+// CHECK-LABEL: invoke void @g()
+// CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
+
+// CHECK: [[g1_lpad]]
+// CHECK: catchpad
+// CHECK: catchret
+// CHECK: invoke void @g()
+// CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
+
+// CHECK: [[g2_cont]]
+// CHECK: br label %[[tryleave:[^ ]*]]
+// CHECK-NOT: 23
+
+// CHECK: [[g1_cont]]
+// CHECK-NEXT: br label %[[trycont:[^ ]*]]
+
+// CHECK: [[trycont]]
+// CHECK: store i32 51, i32* %
+// CHECK-NEXT: br label %[[tryleave]]
+
+// CHECK: [[tryleave]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___except@@"(i8 0, i8* %[[fp]])
+// CHECK-NEXT: ret i32 1
+
+// CHECK: [[g2_lpad]]
+// CHECK: cleanuppad
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___finally___except@@"(i8 1, i8* %[[fp]])
+// CHECK: cleanupret {{.*}} unwind to caller
+
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___finally___except@@"(i8 %abnormal_termination, i8* %frame_pointer)
+// CHECK: ret void
+
+int nested___finally___finally() {
+  int myres = 0;
+  __try {
+    __try {
+      g();
+      myres = 16;
+    } __finally {
+      g();
+      __leave;  // Refers to the outer __try, not the __finally we're in!
+      myres = 23;
+      return 0;
+    }
+
+    myres = 51;
+  } __finally {
+  }
+  return 1;
+}
+// The order of basic blocks in the below doesn't matter.
+// CHECK-LABEL: define i32 @nested___finally___finally()
+
+// CHECK: invoke void @g()
+// CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
+
+// CHECK: [[g1_cont]]
+// CHECK: store i32 16, i32* %[[myres:[^ ]*]],
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$1@0@nested___finally___finally@@"(i8 0, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[finally_cont:.*]] unwind label %[[g2_lpad:.*]]
+
+// CHECK: [[finally_cont]]
+// CHECK: store i32 51, i32* %[[myres]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___finally@@"(i8 0, i8* %[[fp]])
+// CHECK-NEXT: ret i32 1
+
+// CHECK: [[g1_lpad]]
+// CHECK-NEXT: %[[padtoken:[^ ]*]] = cleanuppad []
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$1@0@nested___finally___finally@@"(i8 1, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[finally_cont2:.*]] unwind label %[[endcleanup:[^ ]*]]
+// CHECK: [[finally_cont2]]
+// CHECK: cleanupret %[[padtoken]] unwind label %[[g2_lpad]]
+
+// CHECK: [[endcleanup]]
+// CHECK-NEXT: cleanupendpad %[[padtoken]] unwind label %[[g2_lpad]]
+
+// CHECK: [[g2_lpad]]
+// CHECK-NEXT: %[[padtoken:[^ ]*]] = cleanuppad []
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.localaddress()
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___finally___finally@@"(i8 1, i8* %[[fp]])
+// CHECK: cleanupret %[[padtoken]] unwind to caller
+
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___finally___finally@@"(i8 %abnormal_termination, i8* %frame_pointer)
+// CHECK: ret void
+
+// CHECK-LABEL: define internal void @"\01?fin$1@0@nested___finally___finally@@"(i8 %abnormal_termination, i8* %frame_pointer)
+// CHECK: call void @g()
+// CHECK: unreachable