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4730f05bb8
Summary: I didn't realize that we already allowed atomic load/store of pointers, it was added in 2012 by r162146. This patch updates the documentation and tightens the verifier by using DataLayout to make sure that the stored size is byte-sized and power-of-two. DataLayout is also used for integers, and while I'm here I updated the corresponding code for cmpxchg and rmw. See the following discussion for context and upcoming changes to add floating-point and vector atomics: https://groups.google.com/forum/#!topic/llvm-dev/Nh0P_E3CRoo/discussion Reviewers: reames Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D15512 llvm-svn: 255931
15 lines
442 B
LLVM
15 lines
442 B
LLVM
; RUN: not opt -verify < %s 2>&1 | FileCheck %s
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; CHECK: atomic store operand must have integer, pointer, or floating point type!
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; CHECK: atomic load operand must have integer, pointer, or floating point type!
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define void @foo(x86_mmx* %P, x86_mmx %v) {
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store atomic x86_mmx %v, x86_mmx* %P unordered, align 8
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ret void
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}
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define x86_mmx @bar(x86_mmx* %P) {
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%v = load atomic x86_mmx, x86_mmx* %P unordered, align 8
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ret x86_mmx %v
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}
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