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Test case for r139453, WidenIV::GetExtendedOperandRecurrence.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139504 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2011-09-12 17:20:57 +00:00
parent 5443140021
commit 8f7ca5d98e
1 changed files with 30 additions and 0 deletions
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test/Transforms/IndVarSimplify/2011-09-10-widen-nsw.ll Normal file
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; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s
; Test WidenIV::GetExtendedOperandRecurrence.
; add219 should be extended to i64 because it is nsw, even though its
; sext cannot be hoisted outside the loop.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
define void @test() nounwind {
entry:
br i1 undef, label %for.body11, label %for.end285
for.body11: ; preds = %entry
%shl = shl i32 1, 1
%shl132 = shl i32 %shl, 1
br label %for.body153
for.body153: ; preds = %for.body153, %for.body11
br i1 undef, label %for.body170, label %for.body153
; CHECK: add nsw i64 %indvars.iv, 1
for.body170: ; preds = %for.body170, %for.body153
%i2.19 = phi i32 [ %add249, %for.body170 ], [ undef, %for.body153 ]
%add219 = add nsw i32 %i2.19, 1
%idxprom220 = sext i32 %add219 to i64
%add249 = add nsw i32 %i2.19, %shl132
br label %for.body170
for.end285: ; preds = %entry
ret void
}