1; Test the three-operand form of 32-bit addition. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s 4 5declare i32 @foo(i32, i32, i32) 6 7; Check ALRK. 8define i32 @f1(i32 %dummy, i32 %a, i32 %b, i32 *%flag) { 9; CHECK-LABEL: f1: 10; CHECK: alrk %r2, %r3, %r4 11; CHECK: ipm [[REG1:%r[0-5]]] 12; CHECK: risblg [[REG2:%r[0-5]]], [[REG1]], 31, 159, 35 13; CHECK: st [[REG2]], 0(%r5) 14; CHECK: br %r14 15 %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) 16 %val = extractvalue {i32, i1} %t, 0 17 %obit = extractvalue {i32, i1} %t, 1 18 %ext = zext i1 %obit to i32 19 store i32 %ext, i32 *%flag 20 ret i32 %val 21} 22 23; Check using the overflow result for a branch. 24define i32 @f2(i32 %dummy, i32 %a, i32 %b) { 25; CHECK-LABEL: f2: 26; CHECK: alrk %r2, %r3, %r4 27; CHECK-NEXT: bler %r14 28; CHECK: lhi %r2, 0 29; CHECK: jg foo@PLT 30 %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) 31 %val = extractvalue {i32, i1} %t, 0 32 %obit = extractvalue {i32, i1} %t, 1 33 br i1 %obit, label %call, label %exit 34 35call: 36 %res = tail call i32 @foo(i32 0, i32 %a, i32 %b) 37 ret i32 %res 38 39exit: 40 ret i32 %val 41} 42 43; ... and the same with the inverted direction. 44define i32 @f3(i32 %dummy, i32 %a, i32 %b) { 45; CHECK-LABEL: f3: 46; CHECK: alrk %r2, %r3, %r4 47; CHECK-NEXT: bnler %r14 48; CHECK: lhi %r2, 0 49; CHECK: jg foo@PLT 50 %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) 51 %val = extractvalue {i32, i1} %t, 0 52 %obit = extractvalue {i32, i1} %t, 1 53 br i1 %obit, label %exit, label %call 54 55call: 56 %res = tail call i32 @foo(i32 0, i32 %a, i32 %b) 57 ret i32 %res 58 59exit: 60 ret i32 %val 61} 62 63; Check that we can still use ALR in obvious cases. 64define i32 @f4(i32 %a, i32 %b, i32 *%flag) { 65; CHECK-LABEL: f4: 66; CHECK: alr %r2, %r3 67; CHECK: ipm [[REG1:%r[0-5]]] 68; CHECK: risblg [[REG2:%r[0-5]]], [[REG1]], 31, 159, 35 69; CHECK: st [[REG2]], 0(%r4) 70; CHECK: br %r14 71 %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) 72 %val = extractvalue {i32, i1} %t, 0 73 %obit = extractvalue {i32, i1} %t, 1 74 %ext = zext i1 %obit to i32 75 store i32 %ext, i32 *%flag 76 ret i32 %val 77} 78 79declare {i32, i1} @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone 80 81