| ; RUN: llc < %s -mcpu=generic -mtriple=x86_64-pc-linux-gnu | FileCheck %s |
| |
| ; Verify that the var arg parameters which are passed in registers are stored |
| ; in home stack slots allocated by the caller and that AP is correctly |
| ; calculated. |
| define win64cc void @average_va(i32 %count, ...) nounwind { |
| entry: |
| ; CHECK: pushq |
| ; CHECK: movq %r9, 40(%rsp) |
| ; CHECK: movq %r8, 32(%rsp) |
| ; CHECK: movq %rdx, 24(%rsp) |
| ; CHECK: leaq 24(%rsp), %rax |
| |
| %ap = alloca i8*, align 8 ; <i8**> [#uses=1] |
| %ap.0 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| ret void |
| } |
| |
| declare void @llvm.va_start(i8*) nounwind |
| declare void @llvm.va_copy(i8*, i8*) nounwind |
| declare void @llvm.va_end(i8*) nounwind |
| |
| ; CHECK-LABEL: f5: |
| ; CHECK: pushq |
| ; CHECK: leaq 56(%rsp), |
| define win64cc i8** @f5(i64 %a0, i64 %a1, i64 %a2, i64 %a3, i64 %a4, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| ret i8** %ap |
| } |
| |
| ; CHECK-LABEL: f4: |
| ; CHECK: pushq |
| ; CHECK: leaq 48(%rsp), |
| define win64cc i8** @f4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| ret i8** %ap |
| } |
| |
| ; CHECK-LABEL: f3: |
| ; CHECK: pushq |
| ; CHECK: leaq 40(%rsp), |
| define win64cc i8** @f3(i64 %a0, i64 %a1, i64 %a2, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| ret i8** %ap |
| } |
| |
| ; WinX86_64 uses char* for va_list. Verify that the correct amount of bytes |
| ; are copied using va_copy. |
| |
| ; CHECK-LABEL: copy1: |
| ; CHECK: leaq 32(%rsp), [[REG_copy1:%[a-z]+]] |
| ; CHECK: movq [[REG_copy1]], 8(%rsp) |
| ; CHECK: movq [[REG_copy1]], (%rsp) |
| ; CHECK: ret |
| define win64cc void @copy1(i64 %a0, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %cp = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| %cp.0 = bitcast i8** %cp to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| call void @llvm.va_copy(i8* %cp.0, i8* %ap.0) |
| ret void |
| } |
| |
| ; CHECK-LABEL: copy4: |
| ; CHECK: leaq 56(%rsp), [[REG_copy4:%[a-z]+]] |
| ; CHECK: movq [[REG_copy4]], 8(%rsp) |
| ; CHECK: movq [[REG_copy4]], (%rsp) |
| ; CHECK: ret |
| define win64cc void @copy4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %cp = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| %cp.0 = bitcast i8** %cp to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| call void @llvm.va_copy(i8* %cp.0, i8* %ap.0) |
| ret void |
| } |
| |
| ; CHECK-LABEL: arg4: |
| ; va_start (optimized away as overwritten by va_arg) |
| ; va_arg: |
| ; CHECK: leaq 52(%rsp), [[REG_arg4_2:%[a-z]+]] |
| ; CHECK: movq [[REG_arg4_2]], (%rsp) |
| ; CHECK: movl 48(%rsp), %eax |
| ; CHECK: ret |
| define win64cc i32 @arg4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind { |
| entry: |
| %ap = alloca i8*, align 8 |
| %ap.0 = bitcast i8** %ap to i8* |
| call void @llvm.va_start(i8* %ap.0) |
| %tmp = va_arg i8** %ap, i32 |
| ret i32 %tmp |
| } |