| ;; Test that we skip unconditional PredBB when threading jumps through two |
| ;; successive basic blocks. |
| ; RUN: opt -S -passes='function(jump-threading)' < %s | 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" |
| |
| define i32 @f(i32* %0) { |
| ; CHECK-LABEL: @f |
| ; CHECK: br i1 %good, label %pred.bb, label %pred.pred.bb |
| entry: |
| %size = call i64 @get_size(i32* %0) |
| %good = icmp ugt i64 %size, 3 |
| br i1 %good, label %pred.bb, label %pred.pred.bb |
| |
| ; CHECK: pred.pred.bb: |
| ; CHECK: br label %pred.bb |
| ; CHECK: pred.bb: |
| ; CHECK: br label %bb |
| ; CHECK: bb: |
| pred.pred.bb: ; preds = %entry |
| call void @effect() |
| br label %pred.bb |
| pred.bb: ; preds = %pred.pred.bb, %entry |
| %v = load i32, i32* %0 |
| br label %bb |
| |
| bb: ; preds = %pred.bb |
| call void @effect1(i8* blockaddress(@f, %bb)) |
| br i1 %good, label %cont2, label %cont1 |
| |
| cont1: ; preds = %bb |
| br i1 %good, label %exit, label %cont2 |
| cont2: ; preds = %bb |
| br label %exit |
| exit: ; preds = %cont1, %cont2 |
| ret i32 %v |
| } |
| |
| declare i64 @get_size(i32*) |
| declare void @effect() |
| declare void @effect1(i8*) |
