132 lines
3.4 KiB
LLVM
132 lines
3.4 KiB
LLVM
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-pc-win32 | FileCheck %s
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; Verify that the var arg parameters which are passed in registers are stored
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; in home stack slots allocated by the caller and that AP is correctly
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; calculated.
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define void @average_va(i32 %count, ...) nounwind {
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entry:
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; CHECK: pushq
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; CHECK-DAG: movq %r9, 40(%rsp)
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; CHECK-DAG: movq %r8, 32(%rsp)
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; CHECK-DAG: movq %rdx, 24(%rsp)
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; CHECK: leaq 24(%rsp), %rax
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%ap = alloca i8*, align 8 ; <i8**> [#uses=1]
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%ap1 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
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call void @llvm.va_start(i8* %ap1)
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ret void
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}
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declare void @llvm.va_start(i8*) nounwind
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declare void @llvm.va_copy(i8*, i8*) nounwind
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; CHECK-LABEL: f5:
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; CHECK: pushq
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; CHECK: leaq 56(%rsp),
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define i8* @f5(i64 %a0, i64 %a1, i64 %a2, i64 %a3, i64 %a4, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap1)
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ret i8* %ap1
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}
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; CHECK-LABEL: f4:
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; CHECK: pushq
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; CHECK: leaq 48(%rsp),
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define i8* @f4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap1)
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ret i8* %ap1
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}
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; CHECK-LABEL: f3:
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; CHECK: pushq
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; CHECK: leaq 40(%rsp),
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define i8* @f3(i64 %a0, i64 %a1, i64 %a2, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap1)
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ret i8* %ap1
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}
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; WinX86_64 uses char* for va_list. Verify that the correct amount of bytes
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; are copied using va_copy.
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; CHECK-LABEL: copy1:
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; CHECK: subq $16
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; CHECK: leaq 32(%rsp), [[REG_copy1:%[a-z]+]]
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; CHECK: movq [[REG_copy1]], 8(%rsp)
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; CHECK: movq [[REG_copy1]], (%rsp)
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; CHECK: addq $16
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; CHECK: ret
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define void @copy1(i64 %a0, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%cp = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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%cp1 = bitcast i8** %cp to i8*
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call void @llvm.va_start(i8* %ap1)
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call void @llvm.va_copy(i8* %cp1, i8* %ap1)
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ret void
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}
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; CHECK-LABEL: copy4:
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; CHECK: subq $16
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; CHECK: leaq 56(%rsp), [[REG_copy4:%[a-z]+]]
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; CHECK: movq [[REG_copy4]], 8(%rsp)
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; CHECK: movq [[REG_copy4]], (%rsp)
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; CHECK: addq $16
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; CHECK: ret
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define void @copy4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%cp = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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%cp1 = bitcast i8** %cp to i8*
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call void @llvm.va_start(i8* %ap1)
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call void @llvm.va_copy(i8* %cp1, i8* %ap1)
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ret void
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}
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; CHECK-LABEL: arg4:
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; CHECK: pushq
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; va_start (optimized away as overwritten by va_arg)
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; va_arg:
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; CHECK: leaq 52(%rsp), [[REG_arg4_2:%[a-z]+]]
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; CHECK: movq [[REG_arg4_2]], (%rsp)
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; CHECK: movl 48(%rsp), %eax
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; CHECK: popq
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; CHECK: ret
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define i32 @arg4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind {
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entry:
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%ap = alloca i8*, align 8
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%ap1 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap1)
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%tmp = va_arg i8** %ap, i32
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ret i32 %tmp
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}
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define void @sret_arg(i32* sret(i32) %agg.result, i8* nocapture readnone %format, ...) {
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entry:
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%ap = alloca i8*
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%ap_i8 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap_i8)
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%tmp = va_arg i8** %ap, i32
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store i32 %tmp, i32* %agg.result
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ret void
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}
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; CHECK-LABEL: sret_arg:
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; CHECK: pushq
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; CHECK: movq %rcx, %rax
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; CHECK-DAG: movq %r9, 40(%rsp)
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; CHECK-DAG: movq %r8, 32(%rsp)
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; CHECK-DAG: leaq 36(%rsp), %[[sret:[^ ]*]]
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; CHECK-DAG: movl %r8d, (%rax)
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; CHECK-DAG: movq %[[sret]], (%rsp)
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; CHECK: popq
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; CHECK: retq
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