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1; Test atomic float maximum.2; Expect a libcall in a compare-and-swap loop.3;4; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s5 6define float @f1(ptr %src, float %b) {7; CHECK-LABEL: f1:8; CHECK: lgr [[SRC:%r[0-9]+]], %r29; CHECK: le [[FSRC:%f[0-9]+]], 0(%r2)10; CHECK: ler [[FB:%f[0-9]+]], %f011; CHECK: [[L:\.L.+]]:12; CHECK: ler %f0, [[FSRC]]13; CHECK: ler %f2, [[FB]]14; CHECK: brasl %r14, fmaxf@PLT15; CHECK: lgdr [[RO:%r[0-9]+]], %f016; CHECK: srlg [[RO]], [[RO]], 3217; CHECK: lgdr [[RI:%r[0-9]+]], [[FSRC]]18; CHECK: srlg [[RI]], [[RI]], 3219; CHECK: cs [[RI]], [[RO]], 0([[SRC]])20; CHECK: sllg [[RO]], [[RI]], 3221; CHECK: ldgr [[FSRC]], [[RO]]22; CHECK: jl [[L]]23; CHECK: ler %f0, [[FSRC]]24; CHECK: br %r1425 %res = atomicrmw fmax ptr %src, float %b seq_cst26 ret float %res27}28