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llvm-6502/test/CodeGen/X86/loop-hoist.ll
Dan Gohman 80792f3dde Treat EntryToken nodes as "passive" so that they aren't added to the
ScheduleDAG; they don't correspond to any actual instructions so they
don't need to be scheduled.

This fixes a bug where the EntryToken was being scheduled multiple
times in some cases, though it ended up not causing any trouble because 
EntryToken doesn't expand into anything. With this fixed the schedulers
reliably schedule the expected number of units, so we can check this
with an assertion.

This requires a tweak to test/CodeGen/X86/loop-hoist.ll because it
ends up getting scheduled differently in a trivial way, though it was
enough to fool the prcontext+grep that the test does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49701 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-15 01:22:18 +00:00

27 lines
972 B
LLVM

; RUN: llvm-as < %s | \
; RUN: llc -relocation-model=dynamic-no-pic -mtriple=i686-apple-darwin8.7.2 |\
; RUN: grep L_Arr.non_lazy_ptr
; RUN: llvm-as < %s | \
; RUN: llc -relocation-model=dynamic-no-pic -mtriple=i686-apple-darwin8.7.2 |\
; RUN: %prcontext L_Arr.non_lazy_ptr 1 | grep {4(%esp)}
@Arr = external global [0 x i32] ; <[0 x i32]*> [#uses=1]
define void @foo(i32 %N.in, i32 %x) {
entry:
%N = bitcast i32 %N.in to i32 ; <i32> [#uses=1]
br label %cond_true
cond_true: ; preds = %cond_true, %entry
%indvar = phi i32 [ %x, %entry ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2]
%i.0.0 = bitcast i32 %indvar to i32 ; <i32> [#uses=2]
%tmp = getelementptr [0 x i32]* @Arr, i32 0, i32 %i.0.0 ; <i32*> [#uses=1]
store i32 %i.0.0, i32* %tmp
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %cond_true
return: ; preds = %cond_true
ret void
}