1*9880d681SAndroid Build Coastguard Worker; Test memchr using SRST, with the correct prototype. 2*9880d681SAndroid Build Coastguard Worker; 3*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=s390x-linux-gnu -no-integrated-as | FileCheck %s 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Workerdeclare i8 *@memchr(i8 *%src, i32 %char, i64 %len) 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; Test a simple forwarded call. 8*9880d681SAndroid Build Coastguard Workerdefine i8 *@f1(i64 %len, i8 *%src, i32 %char) { 9*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: f1: 10*9880d681SAndroid Build Coastguard Worker; CHECK-DAG: agr %r2, %r3 11*9880d681SAndroid Build Coastguard Worker; CHECK-DAG: llcr %r0, %r4 12*9880d681SAndroid Build Coastguard Worker; CHECK: [[LABEL:\.[^:]*]]: 13*9880d681SAndroid Build Coastguard Worker; CHECK: srst %r2, %r3 14*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: jo [[LABEL]] 15*9880d681SAndroid Build Coastguard Worker; CHECK: blr %r14 16*9880d681SAndroid Build Coastguard Worker; CHECK: lghi %r2, 0 17*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 18*9880d681SAndroid Build Coastguard Worker %res = call i8 *@memchr(i8 *%src, i32 %char, i64 %len) 19*9880d681SAndroid Build Coastguard Worker ret i8 *%res 20*9880d681SAndroid Build Coastguard Worker} 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Worker; Test a doubled call with no use of %r0 in between. There should be a 23*9880d681SAndroid Build Coastguard Worker; single load of %r0. 24*9880d681SAndroid Build Coastguard Workerdefine i8 *@f2(i8 *%src, i8 *%charptr, i64 %len) { 25*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: f2: 26*9880d681SAndroid Build Coastguard Worker; CHECK: llc %r0, 0(%r3) 27*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: %r0 28*9880d681SAndroid Build Coastguard Worker; CHECK: srst [[RES1:%r[1-5]]], %r2 29*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: %r0 30*9880d681SAndroid Build Coastguard Worker; CHECK: srst %r2, [[RES1]] 31*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 32*9880d681SAndroid Build Coastguard Worker %char = load volatile i8 , i8 *%charptr 33*9880d681SAndroid Build Coastguard Worker %charext = zext i8 %char to i32 34*9880d681SAndroid Build Coastguard Worker %res1 = call i8 *@memchr(i8 *%src, i32 %charext, i64 %len) 35*9880d681SAndroid Build Coastguard Worker %res2 = call i8 *@memchr(i8 *%res1, i32 %charext, i64 %len) 36*9880d681SAndroid Build Coastguard Worker ret i8 *%res2 37*9880d681SAndroid Build Coastguard Worker} 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Worker; Test a doubled call with a use of %r0 in between. %r0 must be loaded 40*9880d681SAndroid Build Coastguard Worker; for each loop. 41*9880d681SAndroid Build Coastguard Workerdefine i8 *@f3(i8 *%src, i8 *%charptr, i64 %len) { 42*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: f3: 43*9880d681SAndroid Build Coastguard Worker; CHECK: llc [[CHAR:%r[1-5]]], 0(%r3) 44*9880d681SAndroid Build Coastguard Worker; CHECK: lr %r0, [[CHAR]] 45*9880d681SAndroid Build Coastguard Worker; CHECK: srst [[RES1:%r[1-5]]], %r2 46*9880d681SAndroid Build Coastguard Worker; CHECK: lhi %r0, 0 47*9880d681SAndroid Build Coastguard Worker; CHECK: blah %r0 48*9880d681SAndroid Build Coastguard Worker; CHECK: lr %r0, [[CHAR]] 49*9880d681SAndroid Build Coastguard Worker; CHECK: srst %r2, [[RES1]] 50*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 51*9880d681SAndroid Build Coastguard Worker %char = load volatile i8 , i8 *%charptr 52*9880d681SAndroid Build Coastguard Worker %charext = zext i8 %char to i32 53*9880d681SAndroid Build Coastguard Worker %res1 = call i8 *@memchr(i8 *%src, i32 %charext, i64 %len) 54*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "blah $0", "{r0}" (i32 0) 55*9880d681SAndroid Build Coastguard Worker %res2 = call i8 *@memchr(i8 *%res1, i32 %charext, i64 %len) 56*9880d681SAndroid Build Coastguard Worker ret i8 *%res2 57*9880d681SAndroid Build Coastguard Worker} 58