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