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[ARM64-BE] Fix variable-argument saving.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208199 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy 2014-05-07 12:33:48 +00:00
parent fca7f5c585
commit d93d214a67
2 changed files with 60 additions and 1 deletions
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3
lib/Target/ARM64/ARM64ISelLowering.cpp
View File

@ -1843,7 +1843,8 @@ void ARM64TargetLowering::saveVarArgRegisters(CCState &CCInfo,
for (unsigned i = FirstVariadicFPR; i < NumFPRArgRegs; ++i) {
unsigned VReg = MF.addLiveIn(FPRArgRegs[i], &ARM64::FPR128RegClass);
SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::v2i64);
SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::f128);
SDValue Store =
DAG.getStore(Val.getValue(1), DL, Val, FIN,
MachinePointerInfo::getStack(i * 16), false, false, 0);

58
test/CodeGen/ARM64/big-endian-varargs.ll Normal file
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@ -0,0 +1,58 @@
; 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 = "arm64_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
}