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 15 define i32 @_Z3fooi(i32 %x) #0 { 16 entry: 17 %x.addr = alloca i32, align 4 18 store i32 %x, i32* %x.addr, align 4 19 br label %while.cond 20 21 while.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 28 while.body: ; preds = %while.cond 29 br label %while.cond 30 31 while.end: ; preds = %while.cond 32 ret i32 0 33 } 34 35 attributes #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
