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32e12df253
It seems that the Darwin PPC assembler requires r0 to be written as 0 when it means 0 (at least in lwarx/stwcx.). Fixes PR15605. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178142 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
687 B
LLVM
27 lines
687 B
LLVM
; RUN: llc < %s -mtriple=powerpc-apple-darwin -march=ppc32 | FileCheck %s
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define i32 @exchange_and_add(i32* %mem, i32 %val) nounwind {
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; CHECK: exchange_and_add:
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; CHECK: lwarx {{r[0-9]+}}, 0, {{r[0-9]+}}
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%tmp = atomicrmw add i32* %mem, i32 %val monotonic
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; CHECK: stwcx. {{r[0-9]+}}, 0, {{r[0-9]+}}
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ret i32 %tmp
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}
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define i32 @exchange_and_cmp(i32* %mem) nounwind {
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; CHECK: exchange_and_cmp:
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; CHECK: lwarx
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%tmp = cmpxchg i32* %mem, i32 0, i32 1 monotonic
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; CHECK: stwcx.
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; CHECK: stwcx.
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ret i32 %tmp
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}
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define i32 @exchange(i32* %mem, i32 %val) nounwind {
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; CHECK: exchange:
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; CHECK: lwarx
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%tmp = atomicrmw xchg i32* %mem, i32 1 monotonic
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; CHECK: stwcx.
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ret i32 %tmp
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}
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