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llvm-project/clang/test/CodeGen/compound-literal.c

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When emitting a compound literal of POD type, continue to emit a separate aggregate temporary and then memcpy it over to the destination. This fixes a regression I introduced with r133235, where the compound literal on the RHS of an assignment makes use of the structure on the LHS of the assignment. I'm deeply suspicious of AggExprEmitter::VisitBinAssign()'s optimization where it emits the RHS of an aggregate assignment directly into the LHS lvalue without checking whether there is any aliasing between the LHS/RHS. However, I'm not in a position to revisit this now. Big thanks to Eli for finding the regression! llvm-svn: 133261
2011-06-18 00:37:20 +08:00
// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
Add codegen support for block-level compound literals. llvm-svn: 51081
2008-05-14 07:18:27 +08:00
int* a = &(int){1};
struct s {int a, b, c;} * b = &(struct s) {1, 2, 3};
// Not working; complex constants are broken
// _Complex double * x = &(_Complex double){1.0f};
When emitting a compound literal of POD type, continue to emit a separate aggregate temporary and then memcpy it over to the destination. This fixes a regression I introduced with r133235, where the compound literal on the RHS of an assignment makes use of the structure on the LHS of the assignment. I'm deeply suspicious of AggExprEmitter::VisitBinAssign()'s optimization where it emits the RHS of an aggregate assignment directly into the LHS lvalue without checking whether there is any aliasing between the LHS/RHS. However, I'm not in a position to revisit this now. Big thanks to Eli for finding the regression! llvm-svn: 133261
2011-06-18 00:37:20 +08:00
void xxx() {
Add codegen support for block-level compound literals. llvm-svn: 51081
2008-05-14 07:18:27 +08:00
int* a = &(int){1};
struct s {int a, b, c;} * b = &(struct s) {1, 2, 3};
_Complex double * x = &(_Complex double){1.0f};
}
When emitting a compound literal of POD type, continue to emit a separate aggregate temporary and then memcpy it over to the destination. This fixes a regression I introduced with r133235, where the compound literal on the RHS of an assignment makes use of the structure on the LHS of the assignment. I'm deeply suspicious of AggExprEmitter::VisitBinAssign()'s optimization where it emits the RHS of an aggregate assignment directly into the LHS lvalue without checking whether there is any aliasing between the LHS/RHS. However, I'm not in a position to revisit this now. Big thanks to Eli for finding the regression! llvm-svn: 133261
2011-06-18 00:37:20 +08:00
// CHECK: define void @f()
void f() {
typedef struct S { int x,y; } S;
// CHECK: [[S:%[a-zA-Z0-9.]+]] = alloca [[STRUCT:%[a-zA-Z0-9.]+]],
struct S s;
// CHECK-NEXT: [[COMPOUNDLIT:%[a-zA-Z0-9.]+]] = alloca [[STRUCT]]
// CHECK-NEXT: [[CX:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]]* [[COMPOUNDLIT]], i32 0, i32 0
// CHECK-NEXT: [[SY:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]]* [[S]], i32 0, i32 1
// CHECK-NEXT: [[TMP:%[a-zA-Z0-9.]+]] = load i32* [[SY]]
// CHECK-NEXT: store i32 [[TMP]], i32* [[CX]]
// CHECK-NEXT: [[CY:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]]* [[COMPOUNDLIT]], i32 0, i32 1
// CHECK-NEXT: [[SX:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]]* [[S]], i32 0, i32 0
// CHECK-NEXT: [[TMP:%[a-zA-Z0-9.]+]] = load i32* [[SX]]
// CHECK-NEXT: store i32 [[TMP]], i32* [[CY]]
// CHECK-NEXT: [[SI8:%[a-zA-Z0-9.]+]] = bitcast [[STRUCT]]* [[S]] to i8*
// CHECK-NEXT: [[COMPOUNDLITI8:%[a-zA-Z0-9.]+]] = bitcast [[STRUCT]]* [[COMPOUNDLIT]] to i8*
// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[SI8]], i8* [[COMPOUNDLITI8]], i64 8, i32 4, i1 false)
s = (S){s.y,s.x};
// CHECK-NEXT: ret void
}