| Ulrich Weigand | c3ec80f | 2018-04-30 17:54:28 +0000 | [diff] [blame] | 1 | ; Test the three-operand form of 64-bit addition. |
| 2 | ; |
| 3 | ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| 4 | |
| 5 | declare i64 @foo(i64, i64, i64) |
| 6 | |
| 7 | ; Check ALGRK. |
| 8 | define i64 @f1(i64 %dummy, i64 %a, i64 %b, i64 *%flag) { |
| 9 | ; CHECK-LABEL: f1: |
| 10 | ; CHECK: algrk %r2, %r3, %r4 |
| 11 | ; CHECK: ipm [[REG1:%r[0-5]]] |
| 12 | ; CHECK: risbg [[REG2:%r[0-5]]], [[REG1]], 63, 191, 35 |
| 13 | ; CHECK: stg [[REG2]], 0(%r5) |
| 14 | ; CHECK: br %r14 |
| 15 | %t = call {i64, i1} @llvm.uadd.with.overflow.i64(i64 %a, i64 %b) |
| 16 | %val = extractvalue {i64, i1} %t, 0 |
| 17 | %obit = extractvalue {i64, i1} %t, 1 |
| 18 | %ext = zext i1 %obit to i64 |
| 19 | store i64 %ext, i64 *%flag |
| 20 | ret i64 %val |
| 21 | } |
| 22 | |
| 23 | ; Check using the overflow result for a branch. |
| 24 | define i64 @f2(i64 %dummy, i64 %a, i64 %b) { |
| 25 | ; CHECK-LABEL: f2: |
| 26 | ; CHECK: algrk %r2, %r3, %r4 |
| 27 | ; CHECK-NEXT: bler %r14 |
| 28 | ; CHECK: lghi %r2, 0 |
| 29 | ; CHECK: jg foo@PLT |
| 30 | %t = call {i64, i1} @llvm.uadd.with.overflow.i64(i64 %a, i64 %b) |
| 31 | %val = extractvalue {i64, i1} %t, 0 |
| 32 | %obit = extractvalue {i64, i1} %t, 1 |
| 33 | br i1 %obit, label %call, label %exit |
| 34 | |
| 35 | call: |
| 36 | %res = tail call i64 @foo(i64 0, i64 %a, i64 %b) |
| 37 | ret i64 %res |
| 38 | |
| 39 | exit: |
| 40 | ret i64 %val |
| 41 | } |
| 42 | |
| 43 | ; ... and the same with the inverted direction. |
| 44 | define i64 @f3(i64 %dummy, i64 %a, i64 %b) { |
| 45 | ; CHECK-LABEL: f3: |
| 46 | ; CHECK: algrk %r2, %r3, %r4 |
| 47 | ; CHECK-NEXT: bnler %r14 |
| 48 | ; CHECK: lghi %r2, 0 |
| 49 | ; CHECK: jg foo@PLT |
| 50 | %t = call {i64, i1} @llvm.uadd.with.overflow.i64(i64 %a, i64 %b) |
| 51 | %val = extractvalue {i64, i1} %t, 0 |
| 52 | %obit = extractvalue {i64, i1} %t, 1 |
| 53 | br i1 %obit, label %exit, label %call |
| 54 | |
| 55 | call: |
| 56 | %res = tail call i64 @foo(i64 0, i64 %a, i64 %b) |
| 57 | ret i64 %res |
| 58 | |
| 59 | exit: |
| 60 | ret i64 %val |
| 61 | } |
| 62 | |
| 63 | ; Check that we can still use ALGR in obvious cases. |
| 64 | define i64 @f4(i64 %a, i64 %b, i64 *%flag) { |
| 65 | ; CHECK-LABEL: f4: |
| 66 | ; CHECK: algr %r2, %r3 |
| 67 | ; CHECK: ipm [[REG1:%r[0-5]]] |
| 68 | ; CHECK: risbg [[REG2:%r[0-5]]], [[REG1]], 63, 191, 35 |
| 69 | ; CHECK: stg [[REG2]], 0(%r4) |
| 70 | ; CHECK: br %r14 |
| 71 | %t = call {i64, i1} @llvm.uadd.with.overflow.i64(i64 %a, i64 %b) |
| 72 | %val = extractvalue {i64, i1} %t, 0 |
| 73 | %obit = extractvalue {i64, i1} %t, 1 |
| 74 | %ext = zext i1 %obit to i64 |
| 75 | store i64 %ext, i64 *%flag |
| 76 | ret i64 %val |
| 77 | } |
| 78 | |
| 79 | declare {i64, i1} @llvm.uadd.with.overflow.i64(i64, i64) nounwind readnone |
| 80 | |