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two simple testcases loopreduce should handle but does not yet currently

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22682 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-05 19:47:39 +00:00
parent 6281ae4bf0
commit 0ef10c935a
2 changed files with 50 additions and 0 deletions
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21
test/Transforms/LoopStrengthReduce/exit_compare_live_range.ll Normal file
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; Make sure that the compare instruction occurs after the increment to avoid
; having overlapping live ranges that result in copies. We want the setcc instruction
; immediately before the conditional branch.
;
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | %prcontext 'br bool' 1 | grep set
; XFAIL: *
void %foo(float* %D, uint %E) {
entry:
br label %no_exit
no_exit:
%indvar = phi uint [ 0, %entry ], [ %indvar.next, %no_exit ]
volatile store float 0.0, float* %D
%indvar.next = add uint %indvar, 1 ; <uint> [#uses=2]
%exitcond = seteq uint %indvar.next, %E ; <bool> [#uses=1]
br bool %exitcond, label %loopexit, label %no_exit
loopexit:
ret void
}

29
test/Transforms/LoopStrengthReduce/related_indvars.ll Normal file
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; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep phi | wc -l | grep 1
; This should only result in one PHI node!
; XFAIL: *
; void foo(double *D, double *E, double F) {
; while (D != E)
; *D++ = F;
; }
void %foo(double* %D, double* %E, double %F) {
entry:
%tmp.24 = seteq double* %D, %E ; <bool> [#uses=1]
br bool %tmp.24, label %return, label %no_exit
no_exit: ; preds = %no_exit, %entry
%indvar = phi uint [ 0, %entry ], [ %indvar.next, %no_exit ] ; <uint> [#uses=3]
%D_addr.0.0.rec = cast uint %indvar to int ; <int> [#uses=1]
%D_addr.0.0 = getelementptr double* %D, uint %indvar ; <double*> [#uses=1]
%inc.rec = add int %D_addr.0.0.rec, 1 ; <int> [#uses=1]
%inc = getelementptr double* %D, int %inc.rec ; <double*> [#uses=1]
store double %F, double* %D_addr.0.0
%tmp.2 = seteq double* %inc, %E ; <bool> [#uses=1]
%indvar.next = add uint %indvar, 1 ; <uint> [#uses=1]
br bool %tmp.2, label %return, label %no_exit
return: ; preds = %no_exit, %entry
ret void
}