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a9ac81b53d
Catch objects with a displacement of zero do not initialize a catch object. The displacement is relative to %rsp at the end of the function's prologue for x86_64 targets. If we place an object at the top-of-stack, we will end up wit a displacement of zero resulting in our catch object remaining uninitialized. Address this by creating our catch objects as fixed objects. We will ensure that the UnwindHelp object is created after the catch objects so that no catch object will have a displacement of zero. Differential Revision: http://reviews.llvm.org/D17823 llvm-svn: 262546
66 lines
1.5 KiB
LLVM
66 lines
1.5 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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declare void @rt_init()
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declare i32 @__CxxFrameHandler3(...)
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define void @test1(void ()* %fp, i64 %n) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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%t.i = alloca i8*
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%t.ii = alloca i8
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%.alloca8 = alloca i8, i64 %n
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store volatile i8 0, i8* %t.ii
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store volatile i8 0, i8* %.alloca8
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invoke void @rt_init()
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to label %try.cont unwind label %catch.switch
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try.cont:
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invoke void %fp()
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to label %exit unwind label %catch.switch
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exit:
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ret void
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catch.pad:
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%cp = catchpad within %cs [i8* null, i32 0, i8** %t.i]
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catchret from %cp to label %exit
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catch.switch:
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%cs = catchswitch within none [label %catch.pad] unwind to caller
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}
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; CHECK-LABEL: $handlerMap$0$test1:
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; CHECK: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 16
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define void @test2(void ()* %fp, i64 %n) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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%t.i = alloca i128
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%.alloca8 = alloca i8, i64 %n
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store volatile i8 0, i8* %.alloca8
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invoke void @rt_init()
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to label %try.cont unwind label %catch.switch
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try.cont:
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invoke void %fp()
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to label %exit unwind label %catch.switch
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exit:
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ret void
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catch.pad:
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%cp = catchpad within %cs [i8* null, i32 0, i128* %t.i]
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catchret from %cp to label %exit
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catch.switch:
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%cs = catchswitch within none [label %catch.pad] unwind to caller
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}
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; CHECK-LABEL: $handlerMap$0$test2:
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; CHECK: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 8
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