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1; Test atomic double maximum.2; Expect a libcall in a compare-and-swap loop.3;4; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s5 6define double @f1(ptr %src, double %b) {7; CHECK-LABEL: f1:8; CHECK: lgr [[RB:%r[0-9]+]], %r29; CHECK: ld [[FB:%f[0-9]+]], 0(%r2)10; CHECK: ldr [[FSRC:%f[0-9]+]], %f011; CHECK: [[L:\.L.+]]:12; CHECK: ldr %f0, [[FB]]13; CHECK: ldr %f2, [[FSRC]]14; CHECK: brasl %r14, fmax@PLT15; CHECK: lgdr [[RO:%r[0-9]+]], %f016; CHECK: lgdr [[RI:%r[0-9]+]], [[FB]]17; CHECK: csg [[RI]], [[RO]], 0([[RB]])18; CHECK: ldgr [[FB]], [[RI]]19; CHECK: jl [[L]]20; CHECK: ldr %f0, [[FB]]21; CHECK: br %r1422 %res = atomicrmw fmax ptr %src, double %b seq_cst23 ret double %res24}25