| ; RUN: opt -S -hotcoldsplit -hotcoldsplit-threshold=0 < %s | FileCheck %s |
| |
| ; Source: |
| ; |
| ; extern void sideeffect(int); |
| ; extern void __attribute__((cold)) sink(); |
| ; void foo(int cond) { |
| ; if (cond) { //< Start outlining here. |
| ; sink(); |
| ; if (cond > 10) |
| ; goto exit1; |
| ; else |
| ; goto exit2; |
| ; } |
| ; exit1: |
| ; sideeffect(1); |
| ; return; |
| ; exit2: |
| ; sideeffect(2); |
| ; return; |
| ; } |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.14.0" |
| |
| ; CHECK-LABEL: define {{.*}}@foo( |
| ; CHECK: br i1 {{.*}}, label %exit1, label %codeRepl |
| ; CHECK-LABEL: codeRepl: |
| ; CHECK: [[targetBlock:%.*]] = call i1 @foo.cold.1( |
| ; CHECK-NEXT: br i1 [[targetBlock]], label %exit1, label %[[return:.*]] |
| ; CHECK-LABEL: exit1: |
| ; CHECK: call {{.*}}@sideeffect(i32 1) |
| ; CHECK: [[return]]: |
| ; CHECK-NEXT: ret void |
| define void @foo(i32 %cond) { |
| entry: |
| %tobool = icmp eq i32 %cond, 0 |
| br i1 %tobool, label %exit1, label %if.then |
| |
| if.then: ; preds = %entry |
| tail call void (...) @sink() |
| %cmp = icmp sgt i32 %cond, 10 |
| br i1 %cmp, label %exit1, label %exit2 |
| |
| exit1: ; preds = %entry, %if.then |
| call void @sideeffect(i32 1) |
| br label %return |
| |
| exit2: ; preds = %if.then |
| call void @sideeffect(i32 2) |
| br label %return |
| |
| return: ; preds = %exit2, %exit1 |
| ret void |
| } |
| |
| ; CHECK-LABEL: define {{.*}}@foo.cold.1( |
| ; CHECK: br |
| ; CHECK: [[exit1Stub:.*]]: |
| ; CHECK-NEXT: ret i1 true |
| ; CHECK: [[returnStub:.*]]: |
| ; CHECK-NEXT: ret i1 false |
| ; CHECK: call {{.*}}@sink |
| ; CHECK-NEXT: [[cmp:%.*]] = icmp |
| ; CHECK-NEXT: br i1 [[cmp]], label %[[exit1Stub]], label %exit2 |
| ; CHECK-LABEL: exit2: |
| ; CHECK-NEXT: call {{.*}}@sideeffect(i32 2) |
| ; CHECK-NEXT: br label %[[returnStub]] |
| |
| declare void @sink(...) cold |
| |
| declare void @sideeffect(i32) |
