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[stack protector] Work around an issue with the BMOVPCB_CALL instruction on ARM by disabling does not return on __stack_chk_fail. 

This is to fix the bots while I look to see if there is something I can do here.

rdar://14811848

llvm-svn: 189076
This commit is contained in:
Michael Gottesman 2013-08-22 23:45:24 +00:00
parent b2f61b4a05
commit 20f25eb958
2 changed files with 33 additions and 1 deletions
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2
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -1809,7 +1809,7 @@ SelectionDAGBuilder::visitSPDescriptorFailure(StackProtectorDescriptor &SPD) {
const TargetLowering *TLI = TM.getTargetLowering();
SDValue Chain = TLI->makeLibCall(DAG, RTLIB::STACKPROTECTOR_CHECK_FAIL,
MVT::isVoid, 0, 0, false, getCurSDLoc(),
true, false).second;
false, false).second;
DAG.setRoot(Chain);
}

32
llvm/test/CodeGen/ARM/stack-protector-bmovpcb_call.ll Normal file
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@ -0,0 +1,32 @@
; RUN: llc -O3 -mcpu=swift -mtriple=armv7s-apple-ios6.0.0 %s -o /dev/null
; rdar://14811848
; Make sure that we do not emit the BMOVPCB_CALL instruction for now or if we
; fix the assumptions in its implementation that we do not crash when doing it.
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
target triple = "armv7s-apple-ios6.0.0"
@main.title = private unnamed_addr constant [15 x i8] c"foo and stuff\0A\00", align 1
@.str = private unnamed_addr constant [3 x i8] c"%s\00", align 1
; Function Attrs: nounwind optsize ssp
define i32 @main() #0 {
entry:
%title = alloca [15 x i8], align 1
%0 = getelementptr inbounds [15 x i8]* %title, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* getelementptr inbounds ([15 x i8]* @main.title, i32 0, i32 0), i32 15, i32 1, i1 false)
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([3 x i8]* @.str, i32 0, i32 0), i8* %0) #3
ret i32 0
}
; Function Attrs: nounwind
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) #1
; Function Attrs: nounwind optsize
declare i32 @printf(i8* nocapture readonly, ...) #2
attributes #0 = { nounwind optsize ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind }
attributes #2 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind optsize }