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e6a2101d1d
This adds support for the main 128-bit atomic operations, using the SystemZ instructions LPQ, STPQ, and CDSG. Generating these instructions is a bit more complex than usual since the i128 type is not legal for the back-end. Therefore, we have to hook the LowerOperationWrapper and ReplaceNodeResults TargetLowering callbacks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310094 91177308-0d34-0410-b5e6-96231b3b80d8
14 lines
311 B
LLVM
14 lines
311 B
LLVM
; Test 128-bit atomic loads.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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define i128 @f1(i128 *%src) {
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; CHECK-LABEL: f1:
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; CHECK: lpq %r0, 0(%r3)
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; CHECK-DAG: stg %r1, 8(%r2)
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; CHECK-DAG: stg %r0, 0(%r2)
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; CHECK: br %r14
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%val = load atomic i128, i128 *%src seq_cst, align 16
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ret i128 %val
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}
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