| Ulrich Weigand | c3ec80f | 2018-04-30 17:54:28 +0000 | [diff] [blame] | 1 | ; Test 32-bit subtraction in which the second operand is constant and in which |
| 2 | ; three-operand forms are available. |
| 3 | ; |
| 4 | ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| 5 | |
| 6 | declare i32 @foo() |
| 7 | |
| 8 | ; Check subtraction of 1. |
| 9 | define zeroext i1 @f1(i32 %dummy, i32 %a, i32 *%res) { |
| 10 | ; CHECK-LABEL: f1: |
| 11 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, -1 |
| 12 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| 13 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 14 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 15 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 16 | ; CHECK: br %r14 |
| 17 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) |
| 18 | %val = extractvalue {i32, i1} %t, 0 |
| 19 | %obit = extractvalue {i32, i1} %t, 1 |
| 20 | store i32 %val, i32 *%res |
| 21 | ret i1 %obit |
| 22 | } |
| 23 | |
| 24 | ; Check the high end of the ALHSIK range. |
| 25 | define zeroext i1 @f2(i32 %dummy, i32 %a, i32 *%res) { |
| 26 | ; CHECK-LABEL: f2: |
| 27 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, -32768 |
| 28 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| 29 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 30 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 31 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 32 | ; CHECK: br %r14 |
| 33 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 32768) |
| 34 | %val = extractvalue {i32, i1} %t, 0 |
| 35 | %obit = extractvalue {i32, i1} %t, 1 |
| 36 | store i32 %val, i32 *%res |
| 37 | ret i1 %obit |
| 38 | } |
| 39 | |
| 40 | ; Check the next value down, which must use SLFI instead. |
| 41 | define zeroext i1 @f3(i32 %dummy, i32 %a, i32 *%res) { |
| 42 | ; CHECK-LABEL: f3: |
| 43 | ; CHECK: slfi %r3, 32769 |
| 44 | ; CHECK-DAG: st %r3, 0(%r4) |
| 45 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 46 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 47 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 48 | ; CHECK: br %r14 |
| 49 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 32769) |
| 50 | %val = extractvalue {i32, i1} %t, 0 |
| 51 | %obit = extractvalue {i32, i1} %t, 1 |
| 52 | store i32 %val, i32 *%res |
| 53 | ret i1 %obit |
| 54 | } |
| 55 | |
| 56 | ; Check the high end of the negative ALHSIK range. |
| 57 | define zeroext i1 @f4(i32 %dummy, i32 %a, i32 *%res) { |
| 58 | ; CHECK-LABEL: f4: |
| 59 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, 1 |
| 60 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| 61 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 62 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 63 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 64 | ; CHECK: br %r14 |
| 65 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 -1) |
| 66 | %val = extractvalue {i32, i1} %t, 0 |
| 67 | %obit = extractvalue {i32, i1} %t, 1 |
| 68 | store i32 %val, i32 *%res |
| 69 | ret i1 %obit |
| 70 | } |
| 71 | |
| 72 | ; Check the low end of the ALHSIK range. |
| 73 | define zeroext i1 @f5(i32 %dummy, i32 %a, i32 *%res) { |
| 74 | ; CHECK-LABEL: f5: |
| 75 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, 32767 |
| 76 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| 77 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 78 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 79 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 80 | ; CHECK: br %r14 |
| 81 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 -32767) |
| 82 | %val = extractvalue {i32, i1} %t, 0 |
| 83 | %obit = extractvalue {i32, i1} %t, 1 |
| 84 | store i32 %val, i32 *%res |
| 85 | ret i1 %obit |
| 86 | } |
| 87 | |
| 88 | ; Check the next value down, which must use SLFI instead. |
| 89 | define zeroext i1 @f6(i32 %dummy, i32 %a, i32 *%res) { |
| 90 | ; CHECK-LABEL: f6: |
| 91 | ; CHECK: slfi %r3, 4294934528 |
| 92 | ; CHECK-DAG: st %r3, 0(%r4) |
| 93 | ; CHECK-DAG: ipm [[REG2:%r[0-5]]] |
| 94 | ; CHECK-DAG: afi [[REG2]], -536870912 |
| 95 | ; CHECK-DAG: risbg %r2, [[REG2]], 63, 191, 33 |
| 96 | ; CHECK: br %r14 |
| 97 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 -32768) |
| 98 | %val = extractvalue {i32, i1} %t, 0 |
| 99 | %obit = extractvalue {i32, i1} %t, 1 |
| 100 | store i32 %val, i32 *%res |
| 101 | ret i1 %obit |
| 102 | } |
| 103 | |
| 104 | ; Check using the overflow result for a branch. |
| 105 | define void @f7(i32 %dummy, i32 %a, i32 *%res) { |
| 106 | ; CHECK-LABEL: f7: |
| 107 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, -1 |
| 108 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| Jonas Paulsson | c88d3f6 | 2018-07-20 09:40:43 +0000 | [diff] [blame] | 109 | ; CHECK: jgle foo@PLT |
| 110 | ; CHECK: br %r14 |
| Ulrich Weigand | c3ec80f | 2018-04-30 17:54:28 +0000 | [diff] [blame] | 111 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) |
| 112 | %val = extractvalue {i32, i1} %t, 0 |
| 113 | %obit = extractvalue {i32, i1} %t, 1 |
| 114 | store i32 %val, i32 *%res |
| 115 | br i1 %obit, label %call, label %exit |
| 116 | |
| 117 | call: |
| 118 | tail call i32 @foo() |
| 119 | br label %exit |
| 120 | |
| 121 | exit: |
| 122 | ret void |
| 123 | } |
| 124 | |
| 125 | ; ... and the same with the inverted direction. |
| 126 | define void @f8(i32 %dummy, i32 %a, i32 *%res) { |
| 127 | ; CHECK-LABEL: f8: |
| 128 | ; CHECK: alhsik [[REG1:%r[0-5]]], %r3, -1 |
| 129 | ; CHECK-DAG: st [[REG1]], 0(%r4) |
| Jonas Paulsson | c88d3f6 | 2018-07-20 09:40:43 +0000 | [diff] [blame] | 130 | ; CHECK: jgnle foo@PLT |
| 131 | ; CHECK: br %r14 |
| Ulrich Weigand | c3ec80f | 2018-04-30 17:54:28 +0000 | [diff] [blame] | 132 | %t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %a, i32 1) |
| 133 | %val = extractvalue {i32, i1} %t, 0 |
| 134 | %obit = extractvalue {i32, i1} %t, 1 |
| 135 | store i32 %val, i32 *%res |
| 136 | br i1 %obit, label %exit, label %call |
| 137 | |
| 138 | call: |
| 139 | tail call i32 @foo() |
| 140 | br label %exit |
| 141 | |
| 142 | exit: |
| 143 | ret void |
| 144 | } |
| 145 | |
| 146 | |
| 147 | declare {i32, i1} @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone |
| 148 | |