[SEH] Outline finally blocks using the new variable capture support

WinEHPrepare was going to have to pattern match the control flow merge
and split that the old lowering used, and that wasn't really feasible.

Now we can teach WinEHPrepare to pattern match this, which is much
simpler:
  %fp = call i8* @llvm.frameaddress(i32 0)
  call void @func(iN [01], i8* %fp)

This prototype happens to match the prototype used by the Win64 SEH
personality function, so this is really simple.

llvm-svn: 234532

1 files changed, 64 insertions, 85 deletions

diff --git a/clang/test/CodeGen/exceptions-seh-leave.c b/clang/test/CodeGen/exceptions-seh-leave.c
index 0d38439c9b0..793501a9fe5 100644
--- a/clang/test/CodeGen/exceptions-seh-leave.c
+++ b/clang/test/CodeGen/exceptions-seh-leave.c
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 %s -triple x86_64-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
 
-void g();
+void g(void);
 
 //////////////////////////////////////////////////////////////////////////////
 // __leave with __except
@@ -38,7 +38,7 @@ int __leave_with___except() {
   return 1;
 }
 // CHECK-LABEL: define i32 @__leave_with___except()
-// CHECK: invoke void bitcast (void (...)* @g to void ()*)()
+// 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
@@ -74,8 +74,8 @@ int __leave_with___finally_simple() {
 // CHECK-NEXT: br label %[[tryleave:[^ ]*]]
 // CHECK-NOT: store i32 23
 // CHECK: [[tryleave]]
-// CHECK-NEXT: store i8 0, i8* %
-// CHECK-NEXT: br label %
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally_simple@@"(i1 zeroext false, i8* %[[fp]])
 
 // __finally block doesn't return, __finally.cont doesn't exist.
 int __leave_with___finally_noreturn() {
@@ -94,8 +94,8 @@ int __leave_with___finally_noreturn() {
 // CHECK-NEXT: br label %[[tryleave:[^ ]*]]
 // CHECK-NOT: store i32 23
 // CHECK: [[tryleave]]
-// CHECK-NEXT: store i8 0, i8* %
-// CHECK-NEXT: br label %
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally_noreturn@@"(i1 zeroext false, i8* %[[fp]])
 
 // The "normal" case.
 int __leave_with___finally() {
@@ -110,7 +110,7 @@ int __leave_with___finally() {
   return 1;
 }
 // CHECK-LABEL: define i32 @__leave_with___finally()
-// CHECK: invoke void bitcast (void (...)* @g to void ()*)()
+// 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.
@@ -118,8 +118,8 @@ int __leave_with___finally() {
 // CHECK-NEXT: br label %[[tryleave:[^ ]*]]
 // CHECK-NOT: store i32 23
 // CHECK: [[tryleave]]
-// CHECK-NEXT: store i8 0, i8* %
-// CHECK-NEXT: br label %
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@__leave_with___finally@@"(i1 zeroext false, i8* %[[fp]])
 
 
 //////////////////////////////////////////////////////////////////////////////
@@ -142,45 +142,37 @@ int nested___except___finally() {
   }
   return 1;
 }
-// The order of basic blocks in the below doesn't matter.
 // CHECK-LABEL: define i32 @nested___except___finally()
 
-// CHECK-LABEL: invoke void bitcast (void (...)* @g to void ()*)()
-// CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
-
-// CHECK: [[g1_cont]]
-// CHECK-NEXT: store i8 0, i8* %[[abnormal:[^ ]*]]
-// CHECK-NEXT: br label %[[finally:[^ ]*]]
+// CHECK-LABEL: invoke void @g()
+// CHECK-NEXT:       to label %[[g1_cont1:.*]] unwind label %[[g1_lpad:.*]]
 
-// CHECK: [[finally]]
-// CHECK-NEXT: invoke void bitcast (void (...)* @g to void ()*)()
-// CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
-
-// CHECK: [[g2_cont]]
-// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
-// CHECK-NOT: store i32 23
+// CHECK: [[g1_cont1]]
+// CHECK-NEXT: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___except___finally@@"(i1 zeroext false, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[fin_cont:.*]] unwind label %[[g2_lpad:.*]]
 
-// Unused __finally continuation block
+// CHECK: [[fin_cont]]
 // CHECK: store i32 51, i32* %
-// CHECK-NEXT: br label %[[tryleave]]
-
-// CHECK: [[tryleave]]
 // CHECK-NEXT: br label %[[trycont:[^ ]*]]
 
 // CHECK: [[g1_lpad]]
-// CHECK: store i8 1, i8* %
-// CHECK-NEXT:  br label %[[finally]]
+// CHECK-NEXT: landingpad
+// CHECK-NEXT: catch i8* null
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: invoke void @"\01?fin$0@0@nested___except___finally@@"(i1 zeroext true, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[g1_resume:.*]] unwind label %[[g2_lpad]]
 
 // CHECK: [[g2_lpad]]
-// CHECK-NOT: %[[abnormal]]
-// CHECK: br label %[[except:[^ ]*]]
-
-// CHECK: [[except]]
-// CHECK-NEXT: br label %[[trycont]]
+// CHECK: br label %[[trycont]]
 
 // CHECK: [[trycont]]
 // CHECK-NEXT: ret i32 1
 
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___except___finally@@"(i1 zeroext %abnormal_termination, i8* %frame_pointer)
+// CHECK: call void @g()
+// CHECK: unreachable
+
 int nested___except___except() {
   int myres = 0;
   __try {
@@ -202,7 +194,7 @@ int nested___except___except() {
 // The order of basic blocks in the below doesn't matter.
 // CHECK-LABEL: define i32 @nested___except___except()
 
-// CHECK-LABEL: invoke void bitcast (void (...)* @g to void ()*)()
+// CHECK-LABEL: invoke void @g()
 // CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
 
 // CHECK: [[g1_cont]]
@@ -213,7 +205,7 @@ int nested___except___except() {
 // CHECK:  br label %[[except:[^ ]*]]
 
 // CHECK: [[except]]
-// CHECK-NEXT: invoke void bitcast (void (...)* @g to void ()*)() #3
+// CHECK-NEXT: invoke void @g()
 // CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
 
 // CHECK: [[g2_cont]]
@@ -256,7 +248,7 @@ int nested___finally___except() {
 // The order of basic blocks in the below doesn't matter.
 // CHECK-LABEL: define i32 @nested___finally___except()
 
-// CHECK-LABEL: invoke void bitcast (void (...)* @g to void ()*)()
+// CHECK-LABEL: invoke void @g()
 // CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
 
 // CHECK: [[g1_cont]]
@@ -266,7 +258,7 @@ int nested___finally___except() {
 // CHECK:  br label %[[except:[^ ]*]]
 
 // CHECK: [[except]]
-// CHECK-NEXT: invoke void bitcast (void (...)* @g to void ()*)()
+// CHECK-NEXT: invoke void @g()
 // CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
 
 // CHECK: [[g2_cont]]
@@ -274,31 +266,25 @@ int nested___finally___except() {
 // CHECK-NOT: 23
 
 // CHECK: [[g2_lpad]]
-// CHECK: store i8 1, i8* %[[abnormal:[^ ]*]]
-// CHECK-NEXT: br label %[[finally:[^ ]*]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___except@@"(i1 zeroext true, i8* %[[fp]])
+// CHECK-NEXT: br label %[[ehresume:[^ ]*]]
 
 // CHECK: [[trycont]]
 // CHECK: store i32 51, i32* %
 // CHECK-NEXT: br label %[[tryleave]]
 
 // CHECK: [[tryleave]]
-// CHECK-NEXT: store i8 0, i8* %[[abnormal]]
-// CHECK-NEXT: br label %[[finally:[^ ]*]]
-
-// CHECK: [[finally]]
-// CHECK-NEXT: %[[abnormallocal:[^ ]*]] = load i8, i8* %[[abnormal]]
-// CHECK-NEXT: %[[reg:[^ ]*]] = icmp eq i8 %[[abnormallocal]], 0
-// CHECK-NEXT: br i1 %[[reg]], label %[[finallycont:[^ ]*]], label %[[finallyresume:[^ ]*]]
-
-// CHECK: [[finallycont]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___except@@"(i1 zeroext false, i8* %[[fp]])
 // CHECK-NEXT: ret i32 1
 
-// CHECK: [[finallyresume]]
-// CHECK-NEXT: br label %[[ehresume:[^ ]*]]
-
 // CHECK: [[ehresume]]
 // CHECK: resume
 
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___finally___except@@"(i1 zeroext %abnormal_termination, i8* %frame_pointer)
+// CHECK: ret void
+
 int nested___finally___finally() {
   int myres = 0;
   __try {
@@ -320,51 +306,44 @@ int nested___finally___finally() {
 // The order of basic blocks in the below doesn't matter.
 // CHECK-LABEL: define i32 @nested___finally___finally()
 
-// CHECK-LABEL: invoke void bitcast (void (...)* @g to void ()*)()
+// CHECK-LABEL: invoke void @g()
 // CHECK-NEXT:       to label %[[g1_cont:.*]] unwind label %[[g1_lpad:.*]]
 
 // CHECK: [[g1_cont]]
 // CHECK: store i32 16, i32* %[[myres:[^ ]*]],
-// CHECK: store i8 0, i8* %[[abnormal:[^ ]*]]
-// CHECK-NEXT: br label %[[finally:[^ ]*]]
-
-// CHECK: [[finally]]
-// CHECK-NEXT: invoke void bitcast (void (...)* @g to void ()*)() #3
-// CHECK-NEXT:       to label %[[g2_cont:.*]] unwind label %[[g2_lpad:.*]]
-
-// CHECK: [[g2_cont]]
-// CHECK-NEXT: br label %[[tryleave:[^ ]*]]
-// CHECK-NOT: store i32 23
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: invoke void @"\01?fin$1@0@nested___finally___finally@@"(i1 zeroext false, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[finally_cont:.*]] unwind label %[[g2_lpad:.*]]
 
-// There's an unreachable block for the skipped `myres = 51`.
+// CHECK: [[finally_cont]]
 // CHECK: store i32 51, i32* %[[myres]]
-// CHECK-NEXT: br label %[[tryleave]]
-
-// CHECK: [[tryleave]]
-// CHECK-NEXT: store i8 0, i8* %[[abnormal]]
-// CHECK-NEXT: br label %[[outerfinally:[^ ]*]]
-
-// CHECK: [[outerfinally]]
-// CHECK-NEXT: %[[abnormallocal:[^ ]*]] = load i8, i8* %[[abnormal]]
-// CHECK-NEXT: %[[reg:[^ ]*]] = icmp eq i8 %[[abnormallocal]], 0
-// CHECK-NEXT: br i1 %[[reg]], label %[[finallycont:[^ ]*]], label %[[finallyresume:[^ ]*]]
-
-// CHECK: [[finallycont]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___finally@@"(i1 zeroext false, i8* %[[fp]])
 // CHECK-NEXT: ret i32 1
 
 // CHECK: [[g1_lpad]]
-// CHECK: store i8 1, i8* %[[abnormal]]
-// CHECK-NEXT: br label %[[finally:[^ ]*]]
+// CHECK-NEXT: landingpad
+// CHECK-NEXT: cleanup
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: invoke void @"\01?fin$1@0@nested___finally___finally@@"(i1 zeroext true, i8* %[[fp]])
+// CHECK-NEXT:       to label %[[finally_cont2:.*]] unwind label %[[g2_lpad]]
 
 // CHECK: [[g2_lpad]]
-// CHECK: br label %[[ehcleanup:[^ ]*]]
+// CHECK-NEXT: landingpad
+// CHECK-NEXT: cleanup
+// CHECK: br label %[[ehcleanup:.*]]
+
+// CHECK: [[finally_cont2]]
+// CHECK: br label %[[ehcleanup]]
 
 // CHECK: [[ehcleanup]]
-// CHECK-NEXT: store i8 1, i8* %[[abnormal]]
-// CHECK-NEXT: br label %[[outerfinally]]
+// CHECK: %[[fp:[^ ]*]] = call i8* @llvm.frameaddress(i32 0)
+// CHECK-NEXT: call void @"\01?fin$0@0@nested___finally___finally@@"(i1 zeroext true, i8* %[[fp]])
+// CHECK: resume
 
-// CHECK: [[finallyresume]]
-// CHECK-NEXT: br label %[[ehresume:[^ ]*]]
+// CHECK-LABEL: define internal void @"\01?fin$0@0@nested___finally___finally@@"(i1 zeroext %abnormal_termination, i8* %frame_pointer)
+// CHECK: ret void
 
-// CHECK: [[ehresume]]
-// CHECK: resume
+// CHECK-LABEL: define internal void @"\01?fin$1@0@nested___finally___finally@@"(i1 zeroext %abnormal_termination, i8* %frame_pointer)
+// CHECK: call void @g()
+// CHECK: unreachable