[llvm-dev] How to add NOP?

[Erdem Derebaşoğlu via llvm-dev]

Here it is:
; ModuleID = 'omp_hello.c'target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"target triple = "x86_64-unknown-linux-gnu"
%ident_t = type { i32, i32, i32, i32, i8* }%struct.anon = type { i32* }
@.str = private unnamed_addr constant [30 x i8] c"Hello World from thread = %d\0A\00", align 1 at .str.1 = private unnamed_addr constant [24 x i8] c"Number of threads = %d\0A\00", align 1 at .str.2 = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00", align 1 at 0 = private unnamed_addr constant %ident_t { i32 0, i32 66, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i32 0, i32 0) }@1 = private unnamed_addr constant %ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i32 0, i32 0) }
; Function Attrs: nounwind optsize uwtabledefine i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 {entry:  %a = alloca i32, align 4  %agg.captured = alloca %struct.anon, align 8  tail call void @omp_set_num_threads(i32 4) #4  %0 = bitcast i32* %a to i8*  call void @llvm.lifetime.start(i64 4, i8* %0) #1  store i32 5, i32* %a, align 4, !tbaa !1  %1 = getelementptr inbounds %struct.anon, %struct.anon* %agg.captured, i64 0, i32 0  store i32* %a, i32** %1, align 8, !tbaa !5  call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%ident_t* nonnull @1, i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon*)* @.omp_outlined. to void (i32*, i32*, ...)*), %struct.anon* nonnull %agg.captured) #1  call void @llvm.lifetime.end(i64 4, i8* %0) #1  ret i32 0}
; Function Attrs: nounwinddeclare void @llvm.lifetime.start(i64, i8* nocapture) #1
; Function Attrs: optsizedeclare void @omp_set_num_threads(i32) #2
; Function Attrs: nounwind optsize uwtabledefine internal void @.omp_outlined.(i32* nocapture readonly %.global_tid., i32* nocapture readnone %.bound_tid., %struct.anon* nocapture readonly %__context) #0 {entry:  %call = tail call i32 @omp_get_thread_num() #4  %0 = getelementptr inbounds %struct.anon, %struct.anon* %__context, i64 0, i32 0  %ref = load i32*, i32** %0, align 8, !tbaa !5  %1 = load i32, i32* %ref, align 4, !tbaa !1  %call1 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i32 %1) #4  %cmp = icmp eq i32 %call, 0  br i1 %cmp, label %if.then, label %if.end
if.then:                                          ; preds = %entry	call void asm "negl %eax;", ""()  %call2 = tail call i32 @omp_get_num_threads() #4  %call3 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i32 %call2) #4  br label %if.end
if.end:                                           ; preds = %if.then, %entry  %2 = load i32, i32* %.global_tid., align 4, !tbaa !1  %3 = tail call i32 @__kmpc_cancel_barrier(%ident_t* nonnull @0, i32 %2) #1  ret void}
; Function Attrs: optsizedeclare i32 @omp_get_thread_num() #2
; Function Attrs: nounwind optsizedeclare i32 @printf(i8* nocapture readonly, ...) #3
; Function Attrs: optsizedeclare i32 @omp_get_num_threads() #2
declare i32 @__kmpc_cancel_barrier(%ident_t*, i32)
; Function Attrs: nounwinddeclare void @llvm.lifetime.end(i64, i8* nocapture) #1
declare void @__kmpc_fork_call(%ident_t*, i32, void (i32*, i32*, ...)*, ...)
attributes #0 = { nounwind optsize uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }attributes #1 = { nounwind }attributes #2 = { optsize "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }attributes #3 = { nounwind optsize "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }attributes #4 = { nounwind optsize }
!llvm.ident = !{!0}
!0 = !{!"clang version 3.8.0 (trunk 243832)"}!1 = !{!2, !2, i64 0}!2 = !{!"int", !3, i64 0}!3 = !{!"omnipotent char", !4, i64 0}!4 = !{!"Simple C/C++ TBAA"}!5 = !{!3, !3, i64 0}
Erdem 		 	   		  
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