mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-07 12:07:17 +00:00
8b6257629a
There really is no arm64_be: it was a useful fiction to test big-endian support while both backends existed in parallel, but now the only platform that uses the name (iOS) doesn't have a big-endian variant, let alone one called "arm64_be". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213748 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
2.0 KiB
LLVM
59 lines
2.0 KiB
LLVM
; RUN: llc < %s | FileCheck %s
|
|
|
|
; Vararg saving must save Q registers using the equivalent of STR/STP.
|
|
|
|
target datalayout = "E-m:e-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64_be-arm-none-eabi"
|
|
|
|
%struct.__va_list = type { i8*, i8*, i8*, i32, i32 }
|
|
|
|
declare void @llvm.va_start(i8*) nounwind
|
|
declare void @llvm.va_end(i8*) nounwind
|
|
|
|
define double @callee(i32 %a, ...) {
|
|
; CHECK: stp
|
|
; CHECK: stp
|
|
; CHECK: stp
|
|
; CHECK: stp
|
|
; CHECK: stp
|
|
; CHECK: stp
|
|
entry:
|
|
%vl = alloca %struct.__va_list, align 8
|
|
%vl1 = bitcast %struct.__va_list* %vl to i8*
|
|
call void @llvm.va_start(i8* %vl1)
|
|
%vr_offs_p = getelementptr inbounds %struct.__va_list* %vl, i64 0, i32 4
|
|
%vr_offs = load i32* %vr_offs_p, align 4
|
|
%0 = icmp sgt i32 %vr_offs, -1
|
|
br i1 %0, label %vaarg.on_stack, label %vaarg.maybe_reg
|
|
|
|
vaarg.maybe_reg: ; preds = %entry
|
|
%new_reg_offs = add i32 %vr_offs, 16
|
|
store i32 %new_reg_offs, i32* %vr_offs_p, align 4
|
|
%inreg = icmp slt i32 %new_reg_offs, 1
|
|
br i1 %inreg, label %vaarg.in_reg, label %vaarg.on_stack
|
|
|
|
vaarg.in_reg: ; preds = %vaarg.maybe_reg
|
|
%reg_top_p = getelementptr inbounds %struct.__va_list* %vl, i64 0, i32 2
|
|
%reg_top = load i8** %reg_top_p, align 8
|
|
%1 = sext i32 %vr_offs to i64
|
|
%2 = getelementptr i8* %reg_top, i64 %1
|
|
%3 = ptrtoint i8* %2 to i64
|
|
%align_be = add i64 %3, 8
|
|
%4 = inttoptr i64 %align_be to i8*
|
|
br label %vaarg.end
|
|
|
|
vaarg.on_stack: ; preds = %vaarg.maybe_reg, %entry
|
|
%stack_p = getelementptr inbounds %struct.__va_list* %vl, i64 0, i32 0
|
|
%stack = load i8** %stack_p, align 8
|
|
%new_stack = getelementptr i8* %stack, i64 8
|
|
store i8* %new_stack, i8** %stack_p, align 8
|
|
br label %vaarg.end
|
|
|
|
vaarg.end: ; preds = %vaarg.on_stack, %vaarg.in_reg
|
|
%.sink = phi i8* [ %4, %vaarg.in_reg ], [ %stack, %vaarg.on_stack ]
|
|
%5 = bitcast i8* %.sink to double*
|
|
%6 = load double* %5, align 8
|
|
call void @llvm.va_end(i8* %vl1)
|
|
ret double %6
|
|
}
|