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llvm-project/clang/test/CodeGen/wasm-varargs.c

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[WebAssembly] Lower va_arg in clang. This uses the general emitVoidPtrVAArg lowering logic for everything, since this supports all types, and we don't have any special requirements. llvm-svn: 261557
2016-02-23 03:17:40 +08:00
// RUN: %clang_cc1 -triple wasm32-unknown-unknown -o - -emit-llvm %s | FileCheck %s
#include <stdarg.h>
int test_i32(char *fmt, ...) {
va_list va;
va_start(va, fmt);
int v = va_arg(va, int);
va_end(va);
return v;
}
// CHECK-LABEL: define i32 @test_i32(i8*{{.*}} %fmt, ...) {{.*}} {
// CHECK: [[FMT_ADDR:%[^,=]+]] = alloca i8*, align 4
// CHECK: [[VA:%[^,=]+]] = alloca i8*, align 4
// CHECK: [[V:%[^,=]+]] = alloca i32, align 4
// CHECK: store i8* %fmt, i8** [[FMT_ADDR]], align 4
// CHECK: [[VA1:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_start(i8* [[VA1]])
// CHECK: [[ARGP_CUR:%[^,=]+]] = load i8*, i8** [[VA]], align 4
// CHECK: [[ARGP_NEXT:%[^,=]+]] = getelementptr inbounds i8, i8* [[ARGP_CUR]], i32 4
// CHECK: store i8* [[ARGP_NEXT]], i8** [[VA]], align 4
// CHECK: [[R3:%[^,=]+]] = bitcast i8* [[ARGP_CUR]] to i32*
// CHECK: [[R4:%[^,=]+]] = load i32, i32* [[R3]], align 4
// CHECK: store i32 [[R4]], i32* [[V]], align 4
// CHECK: [[VA2:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_end(i8* [[VA2]])
// CHECK: [[R5:%[^,=]+]] = load i32, i32* [[V]], align 4
// CHECK: ret i32 [[R5]]
// CHECK: }
long long test_i64(char *fmt, ...) {
va_list va;
va_start(va, fmt);
long long v = va_arg(va, long long);
va_end(va);
return v;
}
// CHECK-LABEL: define i64 @test_i64(i8*{{.*}} %fmt, ...) {{.*}} {
// CHECK: [[FMT_ADDR:%[^,=]+]] = alloca i8*, align 4
// CHECK: [[VA:%[^,=]+]] = alloca i8*, align 4
// CHECK: [[V:%[^,=]+]] = alloca i64, align 8
// CHECK: store i8* %fmt, i8** [[FMT_ADDR]], align 4
// CHECK: [[VA1:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_start(i8* [[VA1]])
// CHECK: [[ARGP_CUR:%[^,=]+]] = load i8*, i8** [[VA]], align 4
// CHECK: [[R0:%[^,=]+]] = ptrtoint i8* [[ARGP_CUR]] to i32
// CHECK: [[R1:%[^,=]+]] = add i32 [[R0]], 7
// CHECK: [[R2:%[^,=]+]] = and i32 [[R1]], -8
// CHECK: [[ARGP_CUR_ALIGNED:%[^,=]+]] = inttoptr i32 [[R2]] to i8*
// CHECK: [[ARGP_NEXT:%[^,=]+]] = getelementptr inbounds i8, i8* [[ARGP_CUR_ALIGNED]], i32 8
// CHECK: store i8* [[ARGP_NEXT]], i8** [[VA]], align 4
// CHECK: [[R3:%[^,=]+]] = bitcast i8* [[ARGP_CUR_ALIGNED]] to i64*
// CHECK: [[R4:%[^,=]+]] = load i64, i64* [[R3]], align 8
// CHECK: store i64 [[R4]], i64* [[V]], align 8
// CHECK: [[VA2:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_end(i8* [[VA2]])
// CHECK: [[R5:%[^,=]+]] = load i64, i64* [[V]], align 8
// CHECK: ret i64 [[R5]]
// CHECK: }
struct S {
[WebAssembly] clang-format (NFC) Summary: This patch runs clang-format on all wasm-only files. Subscribers: dschuff, sbc100, jgravelle-google, sunfish, jfb, cfe-commits Differential Revision: https://reviews.llvm.org/D51448 llvm-svn: 341254
2018-09-01 04:57:00 +08:00
int x;
int y;
int z;
[WebAssembly] Lower va_arg in clang. This uses the general emitVoidPtrVAArg lowering logic for everything, since this supports all types, and we don't have any special requirements. llvm-svn: 261557
2016-02-23 03:17:40 +08:00
};
struct S test_struct(char *fmt, ...) {
va_list va;
va_start(va, fmt);
struct S v = va_arg(va, struct S);
va_end(va);
return v;
}
Generalize NRVO to cover C structs. This commit generalizes NRVO to cover C structs (both trivial and non-trivial structs). rdar://problem/33599681 Differential Revision: https://reviews.llvm.org/D44968 llvm-svn: 328809
2018-03-30 01:56:24 +08:00
// CHECK: define void @test_struct([[STRUCT_S:%[^,=]+]]*{{.*}} noalias sret [[AGG_RESULT:%.*]], i8*{{.*}} %fmt, ...) {{.*}} {
[WebAssembly] Lower va_arg in clang. This uses the general emitVoidPtrVAArg lowering logic for everything, since this supports all types, and we don't have any special requirements. llvm-svn: 261557
2016-02-23 03:17:40 +08:00
// CHECK: [[FMT_ADDR:%[^,=]+]] = alloca i8*, align 4
// CHECK: [[VA:%[^,=]+]] = alloca i8*, align 4
// CHECK: store i8* %fmt, i8** [[FMT_ADDR]], align 4
// CHECK: [[VA1:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_start(i8* [[VA1]])
// CHECK: [[ARGP_CUR:%[^,=]+]] = load i8*, i8** [[VA]], align 4
// CHECK: [[ARGP_NEXT:%[^,=]+]] = getelementptr inbounds i8, i8* [[ARGP_CUR]], i32 12
// CHECK: store i8* [[ARGP_NEXT]], i8** [[VA]], align 4
// CHECK: [[R3:%[^,=]+]] = bitcast i8* [[ARGP_CUR]] to [[STRUCT_S]]*
Generalize NRVO to cover C structs. This commit generalizes NRVO to cover C structs (both trivial and non-trivial structs). rdar://problem/33599681 Differential Revision: https://reviews.llvm.org/D44968 llvm-svn: 328809
2018-03-30 01:56:24 +08:00
// CHECK: [[R4:%[^,=]+]] = bitcast [[STRUCT_S]]* [[AGG_RESULT]] to i8*
[WebAssembly] Lower va_arg in clang. This uses the general emitVoidPtrVAArg lowering logic for everything, since this supports all types, and we don't have any special requirements. llvm-svn: 261557
2016-02-23 03:17:40 +08:00
// CHECK: [[R5:%[^,=]+]] = bitcast [[STRUCT_S]]* [[R3]] to i8*
Change memcpy/memove/memset to have dest and source alignment attributes (Step 1). Summary: Upstream LLVM is changing the the prototypes of the @llvm.memcpy/memmove/memset intrinsics. This change updates the Clang tests for this change. The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument which is required to be a constant integer. It represents the alignment of the dest (and source), and so must be the minimum of the actual alignment of the two. This change removes the alignment argument in favour of placing the alignment attribute on the source and destination pointers of the memory intrinsic call. For example, code which used to read: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false) will now read call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false) At this time the source and destination alignments must be the same (Step 1). Step 2 of the change, to be landed shortly, will relax that contraint and allow the source and destination to have different alignments. llvm-svn: 322964
2018-01-20 01:12:54 +08:00
// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[R4]], i8* align 4 [[R5]], i32 12, i1 false)
[WebAssembly] Lower va_arg in clang. This uses the general emitVoidPtrVAArg lowering logic for everything, since this supports all types, and we don't have any special requirements. llvm-svn: 261557
2016-02-23 03:17:40 +08:00
// CHECK: [[VA2:%[^,=]+]] = bitcast i8** [[VA]] to i8*
// CHECK: call void @llvm.va_end(i8* [[VA2]])
// CHECK: ret void
// CHECK: }