1; RUN: llc -O0 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-O0
2; RUN: llc -O1 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox
3; RUN: llc -O2 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox
4; RUN: llc -O3 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox
5; RUN: llc -misched-postra -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-MORE
6
7; REQUIRES: asserts
8
9; This test verifies that we don't run Machine Function optimizations
10; on optnone functions.
11
12; Function Attrs: noinline optnone
13define i32 @_Z3fooi(i32 %x) #0 {
14entry:
15  %x.addr = alloca i32, align 4
16  store i32 %x, i32* %x.addr, align 4
17  br label %while.cond
18
19while.cond:                                       ; preds = %while.body, %entry
20  %0 = load i32* %x.addr, align 4
21  %dec = add nsw i32 %0, -1
22  store i32 %dec, i32* %x.addr, align 4
23  %tobool = icmp ne i32 %0, 0
24  br i1 %tobool, label %while.body, label %while.end
25
26while.body:                                       ; preds = %while.cond
27  br label %while.cond
28
29while.end:                                        ; preds = %while.cond
30  ret i32 0
31}
32
33attributes #0 = { optnone noinline }
34
35; Nothing that runs at -O0 gets skipped.
36; LLC-O0-NOT: Skipping pass
37
38; Machine Function passes run at -O1 and higher.
39; LLC-Ox-DAG: Skipping pass 'Branch Probability Basic Block Placement'
40; LLC-Ox-DAG: Skipping pass 'CodeGen Prepare'
41; LLC-Ox-DAG: Skipping pass 'Control Flow Optimizer'
42; LLC-Ox-DAG: Skipping pass 'Machine code sinking'
43; LLC-Ox-DAG: Skipping pass 'Machine Common Subexpression Elimination'
44; LLC-Ox-DAG: Skipping pass 'Machine Copy Propagation Pass'
45; LLC-Ox-DAG: Skipping pass 'Machine Loop Invariant Code Motion'
46; LLC-Ox-DAG: Skipping pass 'Merge disjoint stack slots'
47; LLC-Ox-DAG: Skipping pass 'Optimize machine instruction PHIs'
48; LLC-Ox-DAG: Skipping pass 'Peephole Optimizations'
49; LLC-Ox-DAG: Skipping pass 'Post{{.*}}RA{{.*}}{{[Ss]}}cheduler'
50; LLC-Ox-DAG: Skipping pass 'Remove dead machine instructions'
51; LLC-Ox-DAG: Skipping pass 'Tail Duplication'
52
53; Alternate post-RA scheduler.
54; LLC-MORE: Skipping pass 'PostRA Machine Instruction Scheduler'
55