forked from OSchip/llvm-project
136 lines
3.9 KiB
Objective-C
136 lines
3.9 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fexceptions -O2 -o - %s | FileCheck %s
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//
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// <rdar://problem/7471679> [irgen] [eh] Exception code built with clang (x86_64) crashes
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// Just check that we don't emit any dead blocks.
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@interface NSArray @end
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void f0() {
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@try {
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@try {
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@throw @"a";
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} @catch(NSArray *e) {
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}
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} @catch (id e) {
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}
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}
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// CHECK: define void @f1()
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void f1() {
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extern void foo(void);
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while (1) {
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// CHECK: call void @objc_exception_try_enter
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: call i32 @_setjmp(
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// CHECK-NEXT: icmp
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// CHECK-NEXT: br i1
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@try {
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// CHECK: call void asm sideeffect "", "*m"
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// CHECK-NEXT: call void @foo()
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foo();
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// CHECK-NEXT: call void @objc_exception_try_exit
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// CHECK-NEXT: ret void
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// CHECK: call void asm sideeffect "", "=*m"
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// CHECK-NEXT: ret void
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} @finally {
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break;
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}
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}
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}
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// Test that modifications to local variables are respected under
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// optimization. rdar://problem/8160285
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// CHECK: define i32 @f2()
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int f2() {
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extern void foo(void);
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// CHECK: [[X:%.*]] = alloca i32
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// CHECK: store i32 5, i32* [[X]]
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int x = 0;
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x += 5;
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// CHECK: [[SETJMP:%.*]] = call i32 @_setjmp
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// CHECK-NEXT: [[CAUGHT:%.*]] = icmp eq i32 [[SETJMP]], 0
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// CHECK-NEXT: br i1 [[CAUGHT]]
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@try {
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// If the optimizers ever figure out how to make this store 6,
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// that's okay.
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// CHECK: [[T1:%.*]] = load i32* [[X]]
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// CHECK-NEXT: [[T2:%.*]] = add nsw i32 [[T1]], 1
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// CHECK-NEXT: store i32 [[T2]], i32* [[X]]
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x++;
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// CHECK-NEXT: call void asm sideeffect "", "*m,*m"(i32* [[X]]
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// CHECK-NEXT: call void @foo()
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// CHECK-NEXT: call void @objc_exception_try_exit
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// CHECK-NEXT: [[T:%.*]] = load i32* [[X]]
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// CHECK-NEXT: ret i32 [[T]]
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foo();
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} @catch (id) {
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// Landing pad. Note that we elide the re-enter.
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// CHECK: call void asm sideeffect "", "=*m,=*m"(i32* [[X]]
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// CHECK-NEXT: call i8* @objc_exception_extract
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// CHECK-NEXT: [[T1:%.*]] = load i32* [[X]]
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// CHECK-NEXT: [[T2:%.*]] = add nsw i32 [[T1]], -1
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// This store is dead.
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// CHECK-NEXT: store i32 [[T2]], i32* [[X]]
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// CHECK-NEXT: ret i32 [[T2]]
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x--;
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}
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return x;
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}
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// Test that the cleanup destination is saved when entering a finally
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// block. rdar://problem/8293901
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// CHECK: define void @f3()
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void f3() {
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extern void f3_helper(int, int*);
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// CHECK: [[X:%.*]] = alloca i32
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// CHECK: store i32 0, i32* [[X]]
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int x = 0;
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// CHECK: call void @objc_exception_try_enter(
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// CHECK: call i32 @_setjmp
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// CHECK-NEXT: icmp eq
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// CHECK-NEXT: br i1
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@try {
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// CHECK: call void @f3_helper(i32 0, i32* [[X]])
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// CHECK: call void @objc_exception_try_exit(
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f3_helper(0, &x);
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} @finally {
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// CHECK: [[DEST1:%.*]] = phi i32 [ 0, {{%.*}} ], [ 3, {{%.*}} ]
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// CHECK: call void @objc_exception_try_enter
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// CHECK: call i32 @_setjmp
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@try {
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// CHECK: call void @f3_helper(i32 1, i32* [[X]])
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// CHECK: call void @objc_exception_try_exit(
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f3_helper(1, &x);
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} @finally {
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// CHECK: [[DEST2:%.*]] = phi i32 [ 0, {{%.*}} ], [ 5, {{%.*}} ]
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// CHECK: call void @f3_helper(i32 2, i32* [[X]])
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f3_helper(2, &x);
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// This loop is large enough to dissuade the optimizer from just
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// duplicating the finally block.
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while (x) f3_helper(3, &x);
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// This is a switch or maybe some chained branches, but relying
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// on a specific result from the optimizer is really unstable.
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// CHECK: [[DEST2]]
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}
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// This is a switch or maybe some chained branches, but relying
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// on a specific result from the optimizer is really unstable.
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// CHECK: [[DEST1]]
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}
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// CHECK: call void @f3_helper(i32 4, i32* [[X]])
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// CHECK-NEXT: ret void
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f3_helper(4, &x);
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}
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