region-overlap.ll
1.63 KB
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; RUN: opt -S -hotcoldsplit -hotcoldsplit-threshold=0 < %s | FileCheck %s
; Source:
;
; __attribute__((cold)) extern void sink(int);
; extern void sideeffect(int);
; void foo(int cond1, int cond2) {
; if (cond1) {
; if (cond2) { // This is the first cold region we visit.
; sideeffect(0);
; sink(0);
; }
;
; // There's a larger, overlapping cold region here. But we ignore it.
; // This could be improved.
; sideeffect(1);
; sink(1);
; }
; }
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 {{.*}}@_Z3fooii
; CHECK: call {{.*}}@_Z3fooii.cold.1
; CHECK-NOT: _Z3fooii.cold
define void @_Z3fooii(i32, i32) {
%3 = alloca i32, align 4
%4 = alloca i32, align 4
store i32 %0, i32* %3, align 4
store i32 %1, i32* %4, align 4
%5 = load i32, i32* %3, align 4
%6 = icmp ne i32 %5, 0
br i1 %6, label %7, label %12
; <label>:7: ; preds = %2
%8 = load i32, i32* %4, align 4
%9 = icmp ne i32 %8, 0
br i1 %9, label %10, label %11
; <label>:10: ; preds = %7
call void @_Z10sideeffecti(i32 0)
call void @_Z4sinki(i32 0) #3
br label %11
; <label>:11: ; preds = %10, %7
call void @_Z10sideeffecti(i32 1)
call void @_Z4sinki(i32 1) #3
br label %12
; <label>:12: ; preds = %11, %2
ret void
}
; CHECK-LABEL: define {{.*}}@_Z3fooii.cold.1
; CHECK: call void @_Z10sideeffecti(i32 0)
declare void @_Z10sideeffecti(i32)
declare void @_Z4sinki(i32) cold