89 lines
2.5 KiB
LLVM
89 lines
2.5 KiB
LLVM
; Test 64-bit atomic exchange.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check register exchange.
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define i64 @f1(i64 %dummy, i64 *%src, i64 %b) {
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; CHECK-LABEL: f1:
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; CHECK: lg %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: csg %r2, %r4, 0(%r3)
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; CHECK: jl [[LABEL]]
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; CHECK: br %r14
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%res = atomicrmw xchg i64 *%src, i64 %b seq_cst
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ret i64 %res
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}
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; Check the high end of the aligned CSG range.
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define i64 @f2(i64 %dummy, i64 *%src, i64 %b) {
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; CHECK-LABEL: f2:
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; CHECK: lg %r2, 524280(%r3)
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; CHECK: csg %r2, {{%r[0-9]+}}, 524280(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 65535
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%res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
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ret i64 %res
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}
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; Check the next doubleword up, which requires separate address logic.
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define i64 @f3(i64 %dummy, i64 *%src, i64 %b) {
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; CHECK-LABEL: f3:
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; CHECK: agfi %r3, 524288
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; CHECK: lg %r2, 0(%r3)
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; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 65536
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%res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
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ret i64 %res
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}
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; Check the low end of the CSG range.
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define i64 @f4(i64 %dummy, i64 *%src, i64 %b) {
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; CHECK-LABEL: f4:
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; CHECK: lg %r2, -524288(%r3)
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; CHECK: csg %r2, {{%r[0-9]+}}, -524288(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 -65536
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%res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
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ret i64 %res
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}
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; Check the next doubleword down, which requires separate address logic.
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define i64 @f5(i64 %dummy, i64 *%src, i64 %b) {
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; CHECK-LABEL: f5:
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; CHECK: agfi %r3, -524296
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; CHECK: lg %r2, 0(%r3)
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; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%src, i64 -65537
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%res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
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ret i64 %res
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}
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; Check that indexed addresses are not allowed.
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define i64 @f6(i64 %dummy, i64 %base, i64 %index, i64 %b) {
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; CHECK-LABEL: f6:
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; CHECK: agr %r3, %r4
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; CHECK: lg %r2, 0(%r3)
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; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
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; CHECK: br %r14
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%add = add i64 %base, %index
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%ptr = inttoptr i64 %add to i64 *
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%res = atomicrmw xchg i64 *%ptr, i64 %b seq_cst
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ret i64 %res
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}
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; Check exchange of a constant. We should force it into a register and
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; use the sequence above.
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define i64 @f7(i64 %dummy, i64 *%ptr) {
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; CHECK-LABEL: f7:
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; CHECK-DAG: llilf [[VALUE:%r[0-9+]]], 3000000000
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; CHECK-DAG: lg %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: csg %r2, [[VALUE]], 0(%r3)
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; CHECK: jl [[LABEL]]
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; CHECK: br %r14
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%res = atomicrmw xchg i64 *%ptr, i64 3000000000 seq_cst
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ret i64 %res
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}
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