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; RUN: llc -O1 -debug-only=isel %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=FAST 7; RUN: llc -O1 -debug-only=isel -fast-isel=false %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOFAST 8 9; REQUIRES: asserts, default_triple 10 11; This test verifies that we don't run Machine Function optimizations 12; on optnone functions, and that we can turn off FastISel. 13 14; Function Attrs: noinline optnone 15define i32 @_Z3fooi(i32 %x) #0 { 16entry: 17 %x.addr = alloca i32, align 4 18 store i32 %x, i32* %x.addr, align 4 19 br label %while.cond 20 21while.cond: ; preds = %while.body, %entry 22 %0 = load i32, i32* %x.addr, align 4 23 %dec = add nsw i32 %0, -1 24 store i32 %dec, i32* %x.addr, align 4 25 %tobool = icmp ne i32 %0, 0 26 br i1 %tobool, label %while.body, label %while.end 27 28while.body: ; preds = %while.cond 29 br label %while.cond 30 31while.end: ; preds = %while.cond 32 ret i32 0 33} 34 35attributes #0 = { optnone noinline } 36 37; Nothing that runs at -O0 gets skipped. 38; LLC-O0-NOT: Skipping pass 39 40; Machine Function passes run at -O1 and higher. 41; LLC-Ox-DAG: Skipping pass 'Branch Probability Basic Block Placement' 42; LLC-Ox-DAG: Skipping pass 'CodeGen Prepare' 43; LLC-Ox-DAG: Skipping pass 'Control Flow Optimizer' 44; LLC-Ox-DAG: Skipping pass 'Machine code sinking' 45; LLC-Ox-DAG: Skipping pass 'Machine Common Subexpression Elimination' 46; LLC-Ox-DAG: Skipping pass 'Machine Copy Propagation Pass' 47; LLC-Ox-DAG: Skipping pass 'Machine Loop Invariant Code Motion' 48; LLC-Ox-DAG: Skipping pass 'Merge disjoint stack slots' 49; LLC-Ox-DAG: Skipping pass 'Optimize machine instruction PHIs' 50; LLC-Ox-DAG: Skipping pass 'Peephole Optimizations' 51; LLC-Ox-DAG: Skipping pass 'Post{{.*}}RA{{.*}}{{[Ss]}}cheduler' 52; LLC-Ox-DAG: Skipping pass 'Remove dead machine instructions' 53; LLC-Ox-DAG: Skipping pass 'Tail Duplication' 54 55; Alternate post-RA scheduler. 56; LLC-MORE: Skipping pass 'PostRA Machine Instruction Scheduler' 57 58; Selectively disable FastISel for optnone functions. 59; FAST: FastISel is enabled 60; NOFAST: FastISel is disabled 61