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llvm-mirror/test/CodeGen/X86/unwindraise.ll
Jakob Stoklund Olesen 76fcb51532 %RCX is not a function live-out in eh.return functions. 
The function live-out registers must be live at all function returns,
and %RCX is only used by eh.return. When a function also has a normal
return, only %RAX holds a return value.

This fixes PR13188.

llvm-svn: 159116
2012-06-24 15:53:01 +00:00

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; RUN: llc < %s -verify-machineinstrs
; PR13188
;
; The _Unwind_RaiseException function can return normally and via eh.return.
; This causes confusion about the function live-out registers, since the two
; different ways of returning have different return values.
;
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-freebsd9.0"
%struct._Unwind_Context = type { [18 x i8*], i8*, i8*, i8*, %struct.dwarf_eh_bases, i64, i64, i64, [18 x i8] }
%struct.dwarf_eh_bases = type { i8*, i8*, i8* }
%struct._Unwind_FrameState = type { %struct.frame_state_reg_info, i64, i64, i8*, i32, i8*, i32 (i32, i32, i64, %struct._Unwind_Exception*, %struct._Unwind_Context*)*, i64, i64, i64, i8, i8, i8, i8, i8* }
%struct.frame_state_reg_info = type { [18 x %struct.anon], %struct.frame_state_reg_info* }
%struct.anon = type { %union.anon, i32 }
%union.anon = type { i64 }
%struct._Unwind_Exception = type { i64, void (i32, %struct._Unwind_Exception*)*, i64, i64 }
@dwarf_reg_size_table = external hidden unnamed_addr global [18 x i8], align 16
declare void @abort() noreturn
declare fastcc i32 @uw_frame_state_for(%struct._Unwind_Context*, %struct._Unwind_FrameState*) uwtable
define hidden i32 @_Unwind_RaiseException(%struct._Unwind_Exception* %exc) uwtable {
entry:
%fs.i = alloca %struct._Unwind_FrameState, align 8
%this_context = alloca %struct._Unwind_Context, align 8
%cur_context = alloca %struct._Unwind_Context, align 8
%fs = alloca %struct._Unwind_FrameState, align 8
call void @llvm.eh.unwind.init()
%0 = call i8* @llvm.eh.dwarf.cfa(i32 0)
%1 = call i8* @llvm.returnaddress(i32 0)
call fastcc void @uw_init_context_1(%struct._Unwind_Context* %this_context, i8* %0, i8* %1)
%2 = bitcast %struct._Unwind_Context* %cur_context to i8*
%3 = bitcast %struct._Unwind_Context* %this_context to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 240, i32 8, i1 false)
%personality = getelementptr inbounds %struct._Unwind_FrameState* %fs, i64 0, i32 6
%retaddr_column.i = getelementptr inbounds %struct._Unwind_FrameState* %fs, i64 0, i32 9
%flags.i.i.i.i = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 5
%ra.i = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 2
%exception_class = getelementptr inbounds %struct._Unwind_Exception* %exc, i64 0, i32 0
br label %while.body
while.body: ; preds = %uw_update_context.exit, %entry
%call = call fastcc i32 @uw_frame_state_for(%struct._Unwind_Context* %cur_context, %struct._Unwind_FrameState* %fs)
switch i32 %call, label %do.end21 [
i32 5, label %do.end21.loopexit46
i32 0, label %if.end3
]
if.end3: ; preds = %while.body
%4 = load i32 (i32, i32, i64, %struct._Unwind_Exception*, %struct._Unwind_Context*)** %personality, align 8, !tbaa !0
%tobool = icmp eq i32 (i32, i32, i64, %struct._Unwind_Exception*, %struct._Unwind_Context*)* %4, null
br i1 %tobool, label %if.end13, label %if.then4
if.then4: ; preds = %if.end3
%5 = load i64* %exception_class, align 8, !tbaa !3
%call6 = call i32 %4(i32 1, i32 1, i64 %5, %struct._Unwind_Exception* %exc, %struct._Unwind_Context* %cur_context)
switch i32 %call6, label %do.end21.loopexit46 [
i32 6, label %while.end
i32 8, label %if.end13
]
if.end13: ; preds = %if.then4, %if.end3
call fastcc void @uw_update_context_1(%struct._Unwind_Context* %cur_context, %struct._Unwind_FrameState* %fs)
%6 = load i64* %retaddr_column.i, align 8, !tbaa !3
%conv.i = trunc i64 %6 to i32
%cmp.i.i.i = icmp slt i32 %conv.i, 18
br i1 %cmp.i.i.i, label %cond.end.i.i.i, label %cond.true.i.i.i
cond.true.i.i.i: ; preds = %if.end13
call void @abort() noreturn
unreachable
cond.end.i.i.i: ; preds = %if.end13
%sext.i = shl i64 %6, 32
%idxprom.i.i.i = ashr exact i64 %sext.i, 32
%arrayidx.i.i.i = getelementptr inbounds [18 x i8]* @dwarf_reg_size_table, i64 0, i64 %idxprom.i.i.i
%7 = load i8* %arrayidx.i.i.i, align 1, !tbaa !1
%arrayidx2.i.i.i = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 0, i64 %idxprom.i.i.i
%8 = load i8** %arrayidx2.i.i.i, align 8, !tbaa !0
%9 = load i64* %flags.i.i.i.i, align 8, !tbaa !3
%and.i.i.i.i = and i64 %9, 4611686018427387904
%tobool.i.i.i = icmp eq i64 %and.i.i.i.i, 0
br i1 %tobool.i.i.i, label %if.end.i.i.i, label %land.lhs.true.i.i.i
land.lhs.true.i.i.i: ; preds = %cond.end.i.i.i
%arrayidx4.i.i.i = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 8, i64 %idxprom.i.i.i
%10 = load i8* %arrayidx4.i.i.i, align 1, !tbaa !1
%tobool6.i.i.i = icmp eq i8 %10, 0
br i1 %tobool6.i.i.i, label %if.end.i.i.i, label %if.then.i.i.i
if.then.i.i.i: ; preds = %land.lhs.true.i.i.i
%11 = ptrtoint i8* %8 to i64
br label %uw_update_context.exit
if.end.i.i.i: ; preds = %land.lhs.true.i.i.i, %cond.end.i.i.i
%cmp8.i.i.i = icmp eq i8 %7, 8
br i1 %cmp8.i.i.i, label %if.then10.i.i.i, label %cond.true14.i.i.i
if.then10.i.i.i: ; preds = %if.end.i.i.i
%12 = bitcast i8* %8 to i64*
%13 = load i64* %12, align 8, !tbaa !3
br label %uw_update_context.exit
cond.true14.i.i.i: ; preds = %if.end.i.i.i
call void @abort() noreturn
unreachable
uw_update_context.exit: ; preds = %if.then10.i.i.i, %if.then.i.i.i
%retval.0.i.i.i = phi i64 [ %11, %if.then.i.i.i ], [ %13, %if.then10.i.i.i ]
%14 = inttoptr i64 %retval.0.i.i.i to i8*
store i8* %14, i8** %ra.i, align 8, !tbaa !0
br label %while.body
while.end: ; preds = %if.then4
%private_1 = getelementptr inbounds %struct._Unwind_Exception* %exc, i64 0, i32 2
store i64 0, i64* %private_1, align 8, !tbaa !3
%15 = load i8** %ra.i, align 8, !tbaa !0
%16 = ptrtoint i8* %15 to i64
%private_2 = getelementptr inbounds %struct._Unwind_Exception* %exc, i64 0, i32 3
store i64 %16, i64* %private_2, align 8, !tbaa !3
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 240, i32 8, i1 false)
%17 = bitcast %struct._Unwind_FrameState* %fs.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %17)
%personality.i = getelementptr inbounds %struct._Unwind_FrameState* %fs.i, i64 0, i32 6
%retaddr_column.i22 = getelementptr inbounds %struct._Unwind_FrameState* %fs.i, i64 0, i32 9
br label %while.body.i
while.body.i: ; preds = %uw_update_context.exit44, %while.end
%call.i = call fastcc i32 @uw_frame_state_for(%struct._Unwind_Context* %cur_context, %struct._Unwind_FrameState* %fs.i)
%18 = load i8** %ra.i, align 8, !tbaa !0
%19 = ptrtoint i8* %18 to i64
%20 = load i64* %private_2, align 8, !tbaa !3
%cmp.i = icmp eq i64 %19, %20
%cmp2.i = icmp eq i32 %call.i, 0
br i1 %cmp2.i, label %if.end.i, label %do.end21
if.end.i: ; preds = %while.body.i
%21 = load i32 (i32, i32, i64, %struct._Unwind_Exception*, %struct._Unwind_Context*)** %personality.i, align 8, !tbaa !0
%tobool.i = icmp eq i32 (i32, i32, i64, %struct._Unwind_Exception*, %struct._Unwind_Context*)* %21, null
br i1 %tobool.i, label %if.end12.i, label %if.then3.i
if.then3.i: ; preds = %if.end.i
%or.i = select i1 %cmp.i, i32 6, i32 2
%22 = load i64* %exception_class, align 8, !tbaa !3
%call5.i = call i32 %21(i32 1, i32 %or.i, i64 %22, %struct._Unwind_Exception* %exc, %struct._Unwind_Context* %cur_context)
switch i32 %call5.i, label %do.end21 [
i32 7, label %do.body19
i32 8, label %if.end12.i
]
if.end12.i: ; preds = %if.then3.i, %if.end.i
br i1 %cmp.i, label %cond.true.i, label %cond.end.i
cond.true.i: ; preds = %if.end12.i
call void @abort() noreturn
unreachable
cond.end.i: ; preds = %if.end12.i
call fastcc void @uw_update_context_1(%struct._Unwind_Context* %cur_context, %struct._Unwind_FrameState* %fs.i)
%23 = load i64* %retaddr_column.i22, align 8, !tbaa !3
%conv.i23 = trunc i64 %23 to i32
%cmp.i.i.i24 = icmp slt i32 %conv.i23, 18
br i1 %cmp.i.i.i24, label %cond.end.i.i.i33, label %cond.true.i.i.i25
cond.true.i.i.i25: ; preds = %cond.end.i
call void @abort() noreturn
unreachable
cond.end.i.i.i33: ; preds = %cond.end.i
%sext.i26 = shl i64 %23, 32
%idxprom.i.i.i27 = ashr exact i64 %sext.i26, 32
%arrayidx.i.i.i28 = getelementptr inbounds [18 x i8]* @dwarf_reg_size_table, i64 0, i64 %idxprom.i.i.i27
%24 = load i8* %arrayidx.i.i.i28, align 1, !tbaa !1
%arrayidx2.i.i.i29 = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 0, i64 %idxprom.i.i.i27
%25 = load i8** %arrayidx2.i.i.i29, align 8, !tbaa !0
%26 = load i64* %flags.i.i.i.i, align 8, !tbaa !3
%and.i.i.i.i31 = and i64 %26, 4611686018427387904
%tobool.i.i.i32 = icmp eq i64 %and.i.i.i.i31, 0
br i1 %tobool.i.i.i32, label %if.end.i.i.i39, label %land.lhs.true.i.i.i36
land.lhs.true.i.i.i36: ; preds = %cond.end.i.i.i33
%arrayidx4.i.i.i34 = getelementptr inbounds %struct._Unwind_Context* %cur_context, i64 0, i32 8, i64 %idxprom.i.i.i27
%27 = load i8* %arrayidx4.i.i.i34, align 1, !tbaa !1
%tobool6.i.i.i35 = icmp eq i8 %27, 0
br i1 %tobool6.i.i.i35, label %if.end.i.i.i39, label %if.then.i.i.i37
if.then.i.i.i37: ; preds = %land.lhs.true.i.i.i36
%28 = ptrtoint i8* %25 to i64
br label %uw_update_context.exit44
if.end.i.i.i39: ; preds = %land.lhs.true.i.i.i36, %cond.end.i.i.i33
%cmp8.i.i.i38 = icmp eq i8 %24, 8
br i1 %cmp8.i.i.i38, label %if.then10.i.i.i40, label %cond.true14.i.i.i41
if.then10.i.i.i40: ; preds = %if.end.i.i.i39
%29 = bitcast i8* %25 to i64*
%30 = load i64* %29, align 8, !tbaa !3
br label %uw_update_context.exit44
cond.true14.i.i.i41: ; preds = %if.end.i.i.i39
call void @abort() noreturn
unreachable
uw_update_context.exit44: ; preds = %if.then10.i.i.i40, %if.then.i.i.i37
%retval.0.i.i.i42 = phi i64 [ %28, %if.then.i.i.i37 ], [ %30, %if.then10.i.i.i40 ]
%31 = inttoptr i64 %retval.0.i.i.i42 to i8*
store i8* %31, i8** %ra.i, align 8, !tbaa !0
br label %while.body.i
do.body19: ; preds = %if.then3.i
call void @llvm.lifetime.end(i64 -1, i8* %17)
%call20 = call fastcc i64 @uw_install_context_1(%struct._Unwind_Context* %this_context, %struct._Unwind_Context* %cur_context)
%32 = load i8** %ra.i, align 8, !tbaa !0
call void @llvm.eh.return.i64(i64 %call20, i8* %32)
unreachable
do.end21.loopexit46: ; preds = %if.then4, %while.body
%retval.0.ph = phi i32 [ 3, %if.then4 ], [ 5, %while.body ]
br label %do.end21
do.end21: ; preds = %do.end21.loopexit46, %if.then3.i, %while.body.i, %while.body
%retval.0 = phi i32 [ %retval.0.ph, %do.end21.loopexit46 ], [ 3, %while.body ], [ 2, %while.body.i ], [ 2, %if.then3.i ]
ret i32 %retval.0
}
declare void @llvm.eh.unwind.init() nounwind
declare fastcc void @uw_init_context_1(%struct._Unwind_Context*, i8*, i8*) uwtable
declare i8* @llvm.eh.dwarf.cfa(i32) nounwind
declare i8* @llvm.returnaddress(i32) nounwind readnone
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
declare fastcc i64 @uw_install_context_1(%struct._Unwind_Context*, %struct._Unwind_Context*) uwtable
declare void @llvm.eh.return.i64(i64, i8*) nounwind
declare fastcc void @uw_update_context_1(%struct._Unwind_Context*, %struct._Unwind_FrameState* nocapture) uwtable
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
!0 = metadata !{metadata !"any pointer", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA"}
!3 = metadata !{metadata !"long", metadata !1}
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