mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
e8ae34c075
This is a simple patch that makes freeze as a zero-cost instruction, as bitcast already is. Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D85023
81 lines
2.2 KiB
LLVM
81 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -jump-threading -jump-threading-threshold=3 -S -verify | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@a = global i32 0, align 4
|
|
|
|
; Show that freeze is not counted when comparing the cost with the threshold
|
|
define void @foo(i32 %cond1, i32 %cond2) {
|
|
; CHECK-LABEL: @foo(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[COND1:%.*]], 0
|
|
; CHECK-NEXT: br i1 [[TOBOOL]], label [[BB_COND2_THREAD:%.*]], label [[BB_COND2:%.*]]
|
|
; CHECK: bb.cond2:
|
|
; CHECK-NEXT: call void @f1()
|
|
; CHECK-NEXT: [[COND2_FR:%.*]] = freeze i32 [[COND2:%.*]]
|
|
; CHECK-NEXT: [[X:%.*]] = add i32 [[COND2_FR]], 1
|
|
; CHECK-NEXT: [[TOBOOL1:%.*]] = icmp eq i32 [[X]], 0
|
|
; CHECK-NEXT: br i1 [[TOBOOL1]], label [[BB_F4:%.*]], label [[BB_F2:%.*]]
|
|
; CHECK: bb.cond2.thread:
|
|
; CHECK-NEXT: [[COND2_FR2:%.*]] = freeze i32 [[COND2]]
|
|
; CHECK-NEXT: [[X3:%.*]] = add i32 [[COND2_FR2]], 1
|
|
; CHECK-NEXT: [[TOBOOL14:%.*]] = icmp eq i32 [[X3]], 0
|
|
; CHECK-NEXT: br i1 [[TOBOOL14]], label [[BB_F3:%.*]], label [[BB_F2]]
|
|
; CHECK: bb.f2:
|
|
; CHECK-NEXT: call void @f2()
|
|
; CHECK-NEXT: br label [[EXIT:%.*]]
|
|
; CHECK: bb.f3:
|
|
; CHECK-NEXT: call void @f3()
|
|
; CHECK-NEXT: br label [[EXIT]]
|
|
; CHECK: bb.f4:
|
|
; CHECK-NEXT: [[PTR5:%.*]] = phi i32* [ null, [[BB_COND2]] ]
|
|
; CHECK-NEXT: call void @f4()
|
|
; CHECK-NEXT: br label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%tobool = icmp eq i32 %cond1, 0
|
|
br i1 %tobool, label %bb.cond2, label %bb.f1
|
|
|
|
bb.f1:
|
|
call void @f1()
|
|
br label %bb.cond2
|
|
|
|
bb.cond2:
|
|
%ptr = phi i32* [ null, %bb.f1 ], [ @a, %entry ]
|
|
%cond2.fr = freeze i32 %cond2
|
|
%x = add i32 %cond2.fr, 1
|
|
%tobool1 = icmp eq i32 %x, 0
|
|
br i1 %tobool1, label %bb.file, label %bb.f2
|
|
|
|
bb.f2:
|
|
call void @f2()
|
|
br label %exit
|
|
|
|
bb.file:
|
|
%cmp = icmp eq i32* %ptr, null
|
|
br i1 %cmp, label %bb.f4, label %bb.f3
|
|
|
|
bb.f3:
|
|
call void @f3()
|
|
br label %exit
|
|
|
|
bb.f4:
|
|
call void @f4()
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
declare void @f1()
|
|
|
|
declare void @f2()
|
|
|
|
declare void @f3()
|
|
|
|
declare void @f4()
|