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Add test case for PR12377, it was fixed by r194116.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194147 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2013-11-06 11:55:41 +00:00
parent 573a231a31
commit 02707cb98e
1 changed files with 30 additions and 4 deletions
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34
test/Transforms/IndVarSimplify/loop_evaluate_1.ll
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@ -1,8 +1,9 @@
; RUN: opt < %s -indvars -loop-deletion -simplifycfg -S | not grep br
;
; Testcase distilled from 256.bzip2
; RUN: opt < %s -indvars -loop-deletion -simplifycfg -S | FileCheck %s
define i32 @main() {
; Testcase distilled from 256.bzip2
; CHECK-LABEL: @test1
; CHECK-NOT: br
define i32 @test1() {
entry:
br label %loopentry
@ -19,3 +20,28 @@ loopexit: ; preds = %loopentry
ret i32 %tmp.2
}
; PR12377
; CHECK-LABEL: @test2
; CHECK: [[VAR1:%.+]] = add i32 %arg, -11
; CHECK: [[VAR2:%.+]] = lshr i32 [[VAR1]], 1
; CHECK: [[VAR3:%.+]] = add i32 [[VAR2]], 1
; CHECK: [[VAR4:%.+]] = phi i32 [ 0, %bb ], [ [[VAR3]], %bb1.preheader ]
; CHECK: ret i32 [[VAR4]]
define i32 @test2(i32 %arg) {
bb:
%tmp = icmp ugt i32 %arg, 10
br i1 %tmp, label %bb1, label %bb7
bb1: ; preds = %bb1, %bb
%tmp2 = phi i32 [ %tmp5, %bb1 ], [ 0, %bb ]
%tmp3 = phi i32 [ %tmp4, %bb1 ], [ %arg, %bb ]
%tmp4 = add i32 %tmp3, -2
%tmp5 = add i32 %tmp2, 1
%tmp6 = icmp ugt i32 %tmp4, 10
br i1 %tmp6, label %bb1, label %bb7
bb7: ; preds = %bb1, %bb
%tmp8 = phi i32 [ 0, %bb ], [ %tmp5, %bb1 ]
ret i32 %tmp8
}