1; RUN: llc -O1 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox 2; RUN: llc -O2 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox 3; RUN: llc -O3 -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-Ox 4; RUN: llc -misched-postra -debug %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LLC-MORE 5; RUN: llc -O1 -debug-only=isel %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=FAST 6; RUN: llc -O1 -debug-only=isel -fast-isel=false %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOFAST 7 8; REQUIRES: asserts, default_triple 9 10; This test verifies that we don't run Machine Function optimizations 11; on optnone functions, and that we can turn off FastISel. 12 13; Function Attrs: noinline optnone 14define i32 @_Z3fooi(i32 %x) #0 { 15entry: 16 %x.addr = alloca i32, align 4 17 store i32 %x, i32* %x.addr, align 4 18 br label %while.cond 19 20while.cond: ; preds = %while.body, %entry 21 %0 = load i32, i32* %x.addr, align 4 22 %dec = add nsw i32 %0, -1 23 store i32 %dec, i32* %x.addr, align 4 24 %tobool = icmp ne i32 %0, 0 25 br i1 %tobool, label %while.body, label %while.end 26 27while.body: ; preds = %while.cond 28 br label %while.cond 29 30while.end: ; preds = %while.cond 31 ret i32 0 32} 33 34attributes #0 = { optnone noinline } 35 36; Nothing that runs at -O0 gets skipped. 37; LLC-O0-NOT: Skipping pass 38 39; Machine Function passes run at -O1 and higher. 40; LLC-Ox-DAG: Skipping pass 'Branch Probability Basic Block Placement' 41; LLC-Ox-DAG: Skipping pass 'CodeGen Prepare' 42; LLC-Ox-DAG: Skipping pass 'Control Flow Optimizer' 43; LLC-Ox-DAG: Skipping pass 'Machine code sinking' 44; LLC-Ox-DAG: Skipping pass 'Machine Common Subexpression Elimination' 45; LLC-Ox-DAG: Skipping pass 'Machine Copy Propagation Pass' 46; LLC-Ox-DAG: Skipping pass 'Machine Instruction Scheduler' 47; LLC-Ox-DAG: Skipping pass 'Machine Loop Invariant Code Motion' 48; LLC-Ox-DAG: Skipping pass 'Optimize machine instruction PHIs' 49; LLC-Ox-DAG: Skipping pass 'Peephole Optimizations' 50; LLC-Ox-DAG: Skipping pass 'Post{{.*}}RA{{.*}}{{[Ss]}}cheduler' 51; LLC-Ox-DAG: Skipping pass 'Remove dead machine instructions' 52; LLC-Ox-DAG: Skipping pass 'Tail Duplication' 53 54; Alternate post-RA scheduler. 55; LLC-MORE: Skipping pass 'PostRA Machine Instruction Scheduler' 56 57; Selectively disable FastISel for optnone functions. 58; FAST: FastISel is enabled 59; NOFAST: FastISel is disabled 60