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When expanding expressions which are using post-inc mode for multiple loops,

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ensure that the expansion is dominated by the increments of those loops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100748 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-04-08 05:57:57 +00:00
parent 4038f9c21b
commit 701a4aef7f
2 changed files with 43 additions and 0 deletions
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test/CodeGen/X86/multiple-loop-post-inc.ll
+27
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@@ -275,3 +275,30 @@ bb14: ; preds = %bb12, %bb11
return: ; preds = %entry
ret void
}
; Codegen shouldn't crash on this testcase.
define void @bar(i32 %a, i32 %b) nounwind {
entry: ; preds = %bb1, %entry, %for.end204
br label %outer
outer: ; preds = %bb1, %entry
%i6 = phi i32 [ %storemerge171, %bb1 ], [ %a, %entry ] ; <i32> [#uses=2]
%storemerge171 = add i32 %i6, 1 ; <i32> [#uses=1]
br label %inner
inner: ; preds = %bb0, %if.end275
%i8 = phi i32 [ %a, %outer ], [ %indvar.next159, %bb0 ] ; <i32> [#uses=2]
%t338 = load i32* undef ; <i32> [#uses=1]
%t191 = mul i32 %i8, %t338 ; <i32> [#uses=1]
%t179 = add i32 %i6, %t191 ; <i32> [#uses=1]
br label %bb0
bb0: ; preds = %for.body332
%indvar.next159 = add i32 %i8, 1 ; <i32> [#uses=1]
br i1 undef, label %bb1, label %inner
bb1: ; preds = %bb0, %outer
%midx.4 = phi i32 [ %t179, %bb0 ] ; <i32> [#uses=0]
br label %outer
}