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 %s 5 6define double @f1(ptr %src, double %b) { 7; CHECK-LABEL: f1: 8; CHECK: lgr [[RB:%r[0-9]+]], %r2 9; CHECK: ld [[FB:%f[0-9]+]], 0(%r2) 10; CHECK: ldr [[FSRC:%f[0-9]+]], %f0 11; CHECK: [[L:\.L.+]]: 12; CHECK: ldr %f0, [[FB]] 13; CHECK: ldr %f2, [[FSRC]] 14; CHECK: brasl %r14, fmax@PLT 15; CHECK: lgdr [[RO:%r[0-9]+]], %f0 16; 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 %r14 22 %res = atomicrmw fmax ptr %src, double %b seq_cst 23 ret double %res 24} 25