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158d72d728
Set the writable and dead_on_unwind attributes for sret arguments. These indicate that the argument points to writable memory (and it's legal to introduce spurious writes to it on entry to the function) and that the argument memory will not be used if the call unwinds. This enables additional MemCpyOpt/DSE/LICM optimizations.
68 lines
2.2 KiB
Objective-C
68 lines
2.2 KiB
Objective-C
// RUN: %clang_cc1 -triple arm64-apple-ios11 -fobjc-arc -fblocks -fobjc-runtime=ios-11.0 -fobjc-exceptions -fexceptions -debug-info-kind=line-tables-only -emit-llvm -o - %s | FileCheck %s
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// CHECK: %[[STRUCT_STRONG:.*]] = type { i32, ptr }
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// CHECK: %[[STRUCT_WEAK:.*]] = type { i32, ptr }
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typedef struct {
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int i;
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id f1;
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} Strong;
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typedef struct {
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int i;
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__weak id f1;
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} Weak;
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// CHECK: define{{.*}} void @testStrongException()
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// CHECK: %[[AGG_TMP:.*]] = alloca %[[STRUCT_STRONG]], align 8
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// CHECK: %[[AGG_TMP1:.*]] = alloca %[[STRUCT_STRONG]], align 8
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// CHECK: %[[CALL:.*]] = call [2 x i64] @genStrong()
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// CHECK: store [2 x i64] %[[CALL]], ptr %[[AGG_TMP]], align 8
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// CHECK: invoke [2 x i64] @genStrong()
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// CHECK: call void @calleeStrong([2 x i64] %{{.*}}, [2 x i64] %{{.*}})
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// CHECK-NEXT: ret void
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// CHECK: landingpad { ptr, i32 }
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// CHECK: call void @__destructor_8_s8(ptr %[[AGG_TMP]]){{.*}}, !dbg [[ARTIFICIAL_LOC_1:![0-9]+]]
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// CHECK: br label
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// CHECK: resume
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Strong genStrong(void);
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void calleeStrong(Strong, Strong);
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void testStrongException(void) {
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calleeStrong(genStrong(), genStrong());
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}
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// CHECK: define{{.*}} void @testWeakException()
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// CHECK: %[[AGG_TMP:.*]] = alloca %[[STRUCT_WEAK]], align 8
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// CHECK: %[[AGG_TMP1:.*]] = alloca %[[STRUCT_WEAK]], align 8
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// CHECK: call void @genWeak(ptr dead_on_unwind writable sret(%[[STRUCT_WEAK]]) align 8 %[[AGG_TMP]])
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// CHECK: invoke void @genWeak(ptr dead_on_unwind writable sret(%[[STRUCT_WEAK]]) align 8 %[[AGG_TMP1]])
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// CHECK: call void @calleeWeak(ptr noundef %[[AGG_TMP]], ptr noundef %[[AGG_TMP1]])
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// CHECK: ret void
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// CHECK: landingpad { ptr, i32 }
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// CHECK: call void @__destructor_8_w8(ptr %[[AGG_TMP]]){{.*}}, !dbg [[ARTIFICIAL_LOC_2:![0-9]+]]
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// CHECK: br label
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// CHECK: resume
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// CHECK: define{{.*}} void @__destructor_8_w8({{.*}} !dbg ![[DTOR_SP:.*]] {
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// CHECK: load ptr, ptr {{.*}}, !dbg ![[DTOR_LOC:.*]]
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Weak genWeak(void);
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void calleeWeak(Weak, Weak);
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void testWeakException(void) {
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calleeWeak(genWeak(), genWeak());
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}
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// CHECK-DAG: [[ARTIFICIAL_LOC_1]] = !DILocation(line: 0
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// CHECK-DAG: [[ARTIFICIAL_LOC_2]] = !DILocation(line: 0
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// CHECK: ![[DTOR_SP]] = distinct !DISubprogram(linkageName: "__destructor_8_w8",
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// CHECK: ![[DTOR_LOC]] = !DILocation(line: 0, scope: ![[DTOR_SP]])
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