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 %s 5 6define float @f1(ptr %src, float %b) { 7; CHECK-LABEL: f1: 8; CHECK: lgr [[SRC:%r[0-9]+]], %r2 9; CHECK: le [[FSRC:%f[0-9]+]], 0(%r2) 10; CHECK: ler [[FB:%f[0-9]+]], %f0 11; CHECK: [[L:\.L.+]]: 12; CHECK: ler %f0, [[FSRC]] 13; CHECK: ler %f2, [[FB]] 14; CHECK: brasl %r14, fmaxf@PLT 15; CHECK: lgdr [[RO:%r[0-9]+]], %f0 16; CHECK: srlg [[RO]], [[RO]], 32 17; CHECK: lgdr [[RI:%r[0-9]+]], [[FSRC]] 18; CHECK: srlg [[RI]], [[RI]], 32 19; CHECK: cs [[RI]], [[RO]], 0([[SRC]]) 20; CHECK: sllg [[RO]], [[RI]], 32 21; CHECK: ldgr [[FSRC]], [[RO]] 22; CHECK: jl [[L]] 23; CHECK: ler %f0, [[FSRC]] 24; CHECK: br %r14 25 %res = atomicrmw fmax ptr %src, float %b seq_cst 26 ret float %res 27} 28