| Hal Finkel | 65539e3 | 2015-12-12 00:32:00 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -O1 -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -ppc-use-branch-hint=false | FileCheck %s |
| 2 | ; RUN: llc < %s -O1 -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -ppc-use-branch-hint=true | FileCheck %s -check-prefix=CHECK-HINT |
| 3 | define void @branch_hint_1(i32 %src) { |
| 4 | entry: |
| 5 | %cmp = icmp eq i32 %src, 0 |
| 6 | br i1 %cmp, label %if.then, label %if.end |
| 7 | |
| 8 | if.then: |
| 9 | tail call void @foo() #0 |
| 10 | unreachable |
| 11 | |
| 12 | if.end: |
| 13 | call void @goo() |
| 14 | ret void |
| 15 | |
| 16 | ; CHECK-LABEL: branch_hint_1: |
| 17 | ; CHECK: beq |
| 18 | |
| 19 | ; CHECK-HINT-LABEL: branch_hint_1: |
| 20 | ; CHECK-HINT: beq- |
| 21 | } |
| 22 | |
| 23 | define void @branch_hint_2(i32 %src) { |
| 24 | entry: |
| 25 | %cmp = icmp eq i32 %src, 0 |
| 26 | br i1 %cmp, label %if.then, label %if.end |
| 27 | |
| 28 | if.then: |
| 29 | call void @goo() |
| 30 | ret void |
| 31 | |
| 32 | if.end: |
| 33 | tail call void @foo() #0 |
| 34 | unreachable |
| 35 | |
| 36 | ; CHECK-LABEL: @branch_hint_2 |
| 37 | ; CHECK: bne |
| 38 | |
| 39 | ; CHECK-HINT-LABEL: @branch_hint_2 |
| 40 | ; CHECK-HINT: bne- |
| 41 | } |
| 42 | |
| 43 | declare void @foo() |
| 44 | attributes #0 = { noreturn } |
| 45 | |
| 46 | define void @branch_hint_3(i32 %src) { |
| 47 | entry: |
| 48 | %cmp = icmp eq i32 %src, 0 |
| 49 | br i1 %cmp, label %if.then, label %if.end, !prof !0 |
| 50 | |
| 51 | if.then: |
| 52 | call void @foo() |
| 53 | ret void |
| 54 | |
| 55 | if.end: |
| 56 | call void @goo() |
| 57 | ret void |
| 58 | |
| 59 | ; CHECK-LABEL: @branch_hint_3 |
| 60 | ; CHECK: bne |
| 61 | |
| 62 | ; CHECK-HINT-LABEL: @branch_hint_3 |
| 63 | ; CHECK-HINT: bne |
| 64 | } |
| 65 | |
| 66 | !0 = !{!"branch_weights", i32 64, i32 4} |
| 67 | |
| 68 | define void @branch_hint_4(i32 %src) { |
| 69 | entry: |
| 70 | %cmp = icmp eq i32 %src, 0 |
| 71 | br i1 %cmp, label %if.then, label %if.end, !prof !1 |
| 72 | |
| 73 | if.then: |
| 74 | call void @foo() |
| 75 | ret void |
| 76 | |
| 77 | if.end: |
| 78 | call void @goo() |
| 79 | ret void |
| 80 | |
| 81 | ; CHECK-HINT-LABEL: branch_hint_4 |
| 82 | ; CHECK-HINT: bne |
| 83 | } |
| 84 | |
| 85 | !1 = !{!"branch_weights", i32 64, i32 8} |
| 86 | |
| 87 | define void @branch_hint_5(i32 %src) { |
| 88 | entry: |
| 89 | %cmp = icmp eq i32 %src, 0 |
| 90 | br i1 %cmp, label %if.then, label %if.end |
| 91 | |
| 92 | if.then: |
| 93 | ret void |
| 94 | |
| 95 | if.end: |
| 96 | call void @goo() |
| 97 | ret void |
| 98 | |
| 99 | ; CHECK-HINT-LABEL: branch_hint_5: |
| 100 | ; CHECK-HINT: beq |
| 101 | } |
| 102 | |
| 103 | declare void @goo() |
| 104 | |
| 105 | define void @branch_hint_6(i32 %src1, i32 %src2, i32 %src3) { |
| 106 | entry: |
| 107 | %cmp = icmp eq i32 %src1, 0 |
| 108 | br i1 %cmp, label %if.end.6, label %if.end, !prof !3 |
| 109 | |
| 110 | if.end: |
| 111 | %cmp1 = icmp eq i32 %src2, 0 |
| 112 | br i1 %cmp1, label %if.end.3, label %if.then.2 |
| 113 | |
| 114 | if.then.2: |
| 115 | tail call void @foo() #0 |
| 116 | unreachable |
| 117 | |
| 118 | if.end.3: |
| 119 | %cmp4 = icmp eq i32 %src3, 1 |
| 120 | br i1 %cmp4, label %if.then.5, label %if.end.6 |
| 121 | |
| 122 | if.then.5: |
| 123 | tail call void @foo() #0 |
| 124 | unreachable |
| 125 | |
| 126 | if.end.6: |
| 127 | ret void |
| 128 | |
| 129 | ; CHECK-HINT-LABEL: branch_hint_6: |
| 130 | ; CHECK-HINT: bne |
| 131 | ; CHECK-HINT: bne- |
| 132 | ; CHECK-HINT: bne+ |
| 133 | } |
| 134 | |
| 135 | !3 = !{!"branch_weights", i32 64, i32 4} |