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https://github.com/c64scene-ar/llvm-6502.git
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64b2297786
Win64 stack unwinder gets confused when execution flow "falls through" after a call to 'noreturn' function. This fixes the "missing epilogue" problem by emitting a trap instruction for IR 'unreachable' on x86_x64-pc-windows. A secondary use for it would be for anyone wanting to make double-sure that 'noreturn' functions, indeed, do not return. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206684 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.2 KiB
LLVM
33 lines
1.2 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin < %s | FileCheck -check-prefix=X64_DARWIN %s
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; RUN: llc -mtriple=x86_64-pc-linux < %s | FileCheck -check-prefix=X64_LINUX %s
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; RUN: llc -mtriple=x86_64-pc-windows < %s | FileCheck -check-prefix=X64_WINDOWS %s
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; RUN: llc -mtriple=x86_64-pc-windows-gnu < %s | FileCheck -check-prefix=X64_WINDOWS_GNU %s
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; X64_DARWIN: orq
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; X64_DARWIN-NEXT: %bb8.i329
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; X64_LINUX: orq %rax, %rcx
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; X64_LINUX-NEXT: %bb8.i329
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; X64_WINDOWS: orq %rax, %rcx
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; X64_WINDOWS-NEXT: ud2
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; X64_WINDOWS_GNU: orq %rax, %rcx
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; X64_WINDOWS_GNU-NEXT: ud2
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@_ZN11xercesc_2_513SchemaSymbols21fgURI_SCHEMAFORSCHEMAE = external constant [33 x i16], align 32 ; <[33 x i16]*> [#uses=1]
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@_ZN11xercesc_2_56XMLUni16fgNotationStringE = external constant [9 x i16], align 16 ; <[9 x i16]*> [#uses=1]
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define fastcc void @foo() {
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entry:
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br i1 icmp eq (i64 or (i64 ptrtoint ([33 x i16]* @_ZN11xercesc_2_513SchemaSymbols21fgURI_SCHEMAFORSCHEMAE to i64),
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i64 ptrtoint ([9 x i16]* @_ZN11xercesc_2_56XMLUni16fgNotationStringE to i64)), i64 0),
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label %bb8.i329, label %bb4.i.i318.preheader
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bb4.i.i318.preheader: ; preds = %bb6
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unreachable
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bb8.i329: ; preds = %bb6
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unreachable
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}
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