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The REX prefix should be used on indirect jmps, but not direct ones. For direct jumps, the unwinder looks at the offset to determine if it's inside the current function. Differential Revision: https://reviews.llvm.org/D24359 llvm-svn: 281003
39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-pc-win32-coreclr | FileCheck %s -check-prefix=WIN_X64
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; RUN: llc < %s -mtriple=x86_64-pc-linux | FileCheck %s -check-prefix=LINUX
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%Object = type <{ [0 x i64*]* }>
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define void @C1(%Object addrspace(1)* %param0) gc "coreclr" {
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entry:
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; WIN_X64: # BB#0:
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; WIN_X64: pushq %rax
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; LINUX: # BB#0: # %entry
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; LINUX: movq $0, -8(%rsp)
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%this = alloca %Object addrspace(1)*
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store %Object addrspace(1)* null, %Object addrspace(1)** %this
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store %Object addrspace(1)* %param0, %Object addrspace(1)** %this
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br label %0
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; <label>:0 ; preds = %entry
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%1 = load %Object addrspace(1)*, %Object addrspace(1)** %this, align 8
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; WIN_X64: xorl %r8d, %r8d
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; WIN_X64: popq %rax
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; WIN_X64: jmp C2 # TAILCALL
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; LINUX: xorl %edx, %edx
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; LINUX: jmp C2 # TAILCALL
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tail call void @C2(%Object addrspace(1)* %1, i32 0, %Object addrspace(1)* null)
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ret void
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}
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declare void @C2(%Object addrspace(1)*, i32, %Object addrspace(1)*)
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; Function Attrs: nounwind
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declare void @llvm.localescape(...) #0
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attributes #0 = { nounwind }
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