| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -hotcoldsplit -hotcoldsplit-threshold=0 < %s | FileCheck %s |
| 2 | |
| 3 | ; Source: |
| 4 | ; |
| 5 | ; extern void sideeffect(int); |
| 6 | ; extern void __attribute__((cold)) sink(); |
| 7 | ; void foo(int cond) { |
| 8 | ; if (cond) { //< Start outlining here. |
| 9 | ; while (cond > 10) { |
| 10 | ; --cond; |
| 11 | ; sideeffect(0); |
| 12 | ; } |
| 13 | ; sink(); |
| 14 | ; } |
| 15 | ; sideeffect(1); |
| 16 | ; } |
| 17 | |
| 18 | target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| 19 | target triple = "x86_64-apple-macosx10.14.0" |
| 20 | |
| 21 | ; CHECK-LABEL: define {{.*}}@foo( |
| 22 | ; CHECK: br i1 {{.*}}, label %if.end, label %codeRepl |
| 23 | ; CHECK-LABEL: codeRepl: |
| 24 | ; CHECK-NEXT: call void @foo.cold.1 |
| 25 | ; CHECK-LABEL: if.end: |
| 26 | ; CHECK: call void @sideeffect(i32 1) |
| 27 | define void @foo(i32 %cond) { |
| 28 | entry: |
| 29 | %tobool = icmp eq i32 %cond, 0 |
| 30 | br i1 %tobool, label %if.end, label %while.cond.preheader |
| 31 | |
| 32 | while.cond.preheader: ; preds = %entry |
| 33 | %cmp3 = icmp sgt i32 %cond, 10 |
| 34 | br i1 %cmp3, label %while.body.preheader, label %while.end |
| 35 | |
| 36 | while.body.preheader: ; preds = %while.cond.preheader |
| 37 | br label %while.body |
| 38 | |
| 39 | while.body: ; preds = %while.body.preheader, %while.body |
| 40 | %cond.addr.04 = phi i32 [ %dec, %while.body ], [ %cond, %while.body.preheader ] |
| 41 | %dec = add nsw i32 %cond.addr.04, -1 |
| 42 | tail call void @sideeffect(i32 0) #3 |
| 43 | %cmp = icmp sgt i32 %dec, 10 |
| 44 | br i1 %cmp, label %while.body, label %while.end.loopexit |
| 45 | |
| 46 | while.end.loopexit: ; preds = %while.body |
| 47 | br label %while.end |
| 48 | |
| 49 | while.end: ; preds = %while.end.loopexit, %while.cond.preheader |
| 50 | tail call void (...) @sink() |
| 51 | ret void |
| 52 | |
| 53 | if.end: ; preds = %entry |
| 54 | tail call void @sideeffect(i32 1) |
| 55 | ret void |
| 56 | } |
| 57 | |
| 58 | ; This is the same as @foo, but the while loop comes after the sink block. |
| 59 | ; CHECK-LABEL: define {{.*}}@while_loop_after_sink( |
| 60 | ; CHECK: br i1 {{.*}}, label %if.end, label %codeRepl |
| 61 | ; CHECK-LABEL: codeRepl: |
| 62 | ; CHECK-NEXT: call void @while_loop_after_sink.cold.1 |
| 63 | ; CHECK-LABEL: if.end: |
| 64 | ; CHECK: call void @sideeffect(i32 1) |
| 65 | define void @while_loop_after_sink(i32 %cond) { |
| 66 | entry: |
| 67 | %tobool = icmp eq i32 %cond, 0 |
| 68 | br i1 %tobool, label %if.end, label %sink |
| 69 | |
| 70 | sink: |
| 71 | tail call void (...) @sink() |
| 72 | br label %while.cond.preheader |
| 73 | |
| 74 | while.cond.preheader: |
| 75 | %cmp3 = icmp sgt i32 %cond, 10 |
| 76 | br i1 %cmp3, label %while.body.preheader, label %while.end |
| 77 | |
| 78 | while.body.preheader: ; preds = %while.cond.preheader |
| 79 | br label %while.body |
| 80 | |
| 81 | while.body: ; preds = %while.body.preheader, %while.body |
| 82 | %cond.addr.04 = phi i32 [ %dec, %while.body ], [ %cond, %while.body.preheader ] |
| 83 | %dec = add nsw i32 %cond.addr.04, -1 |
| 84 | tail call void @sideeffect(i32 0) #3 |
| 85 | %cmp = icmp sgt i32 %dec, 10 |
| 86 | br i1 %cmp, label %while.body, label %while.end.loopexit |
| 87 | |
| 88 | while.end.loopexit: ; preds = %while.body |
| 89 | br label %while.end |
| 90 | |
| 91 | while.end: ; preds = %while.end.loopexit, %while.cond.preheader |
| 92 | ret void |
| 93 | |
| 94 | if.end: ; preds = %entry |
| 95 | tail call void @sideeffect(i32 1) |
| 96 | ret void |
| 97 | } |
| 98 | |
| 99 | ; CHECK-LABEL: define {{.*}}@foo.cold.1 |
| 100 | ; CHECK: phi i32 |
| 101 | ; CHECK-NEXT: add nsw i32 |
| 102 | ; CHECK-NEXT: call {{.*}}@sideeffect |
| 103 | ; CHECK-NEXT: icmp |
| 104 | ; CHECK-NEXT: br |
| 105 | |
| 106 | ; CHECK-LABEL: define {{.*}}@while_loop_after_sink.cold.1 |
| 107 | ; CHECK: call {{.*}}@sink |
| 108 | ; CHECK: phi i32 |
| 109 | ; CHECK-NEXT: add nsw i32 |
| 110 | ; CHECK-NEXT: call {{.*}}@sideeffect |
| 111 | ; CHECK-NEXT: icmp |
| 112 | ; CHECK-NEXT: br |
| 113 | |
| 114 | declare void @sideeffect(i32) |
| 115 | |
| 116 | declare void @sink(...) cold |