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02707cb98e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194147 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.6 KiB
LLVM
48 lines
1.6 KiB
LLVM
; RUN: opt < %s -indvars -loop-deletion -simplifycfg -S | FileCheck %s
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; Testcase distilled from 256.bzip2
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; CHECK-LABEL: @test1
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; CHECK-NOT: br
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define i32 @test1() {
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entry:
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br label %loopentry
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loopentry: ; preds = %loopentry, %entry
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%indvar1 = phi i32 [ 0, %entry ], [ %indvar.next2, %loopentry ] ; <i32> [#uses=1]
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%h.0 = phi i32 [ %tmp.2, %loopentry ], [ 4, %entry ] ; <i32> [#uses=1]
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%tmp.1 = mul i32 %h.0, 3 ; <i32> [#uses=1]
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%tmp.2 = add i32 %tmp.1, 1 ; <i32> [#uses=2]
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%indvar.next2 = add i32 %indvar1, 1 ; <i32> [#uses=2]
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%exitcond3 = icmp ne i32 %indvar.next2, 4 ; <i1> [#uses=1]
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br i1 %exitcond3, label %loopentry, label %loopexit
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loopexit: ; preds = %loopentry
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ret i32 %tmp.2
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}
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; PR12377
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; CHECK-LABEL: @test2
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; CHECK: [[VAR1:%.+]] = add i32 %arg, -11
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; CHECK: [[VAR2:%.+]] = lshr i32 [[VAR1]], 1
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; CHECK: [[VAR3:%.+]] = add i32 [[VAR2]], 1
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; CHECK: [[VAR4:%.+]] = phi i32 [ 0, %bb ], [ [[VAR3]], %bb1.preheader ]
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; CHECK: ret i32 [[VAR4]]
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define i32 @test2(i32 %arg) {
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bb:
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%tmp = icmp ugt i32 %arg, 10
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br i1 %tmp, label %bb1, label %bb7
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bb1: ; preds = %bb1, %bb
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%tmp2 = phi i32 [ %tmp5, %bb1 ], [ 0, %bb ]
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%tmp3 = phi i32 [ %tmp4, %bb1 ], [ %arg, %bb ]
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%tmp4 = add i32 %tmp3, -2
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%tmp5 = add i32 %tmp2, 1
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%tmp6 = icmp ugt i32 %tmp4, 10
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br i1 %tmp6, label %bb1, label %bb7
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bb7: ; preds = %bb1, %bb
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%tmp8 = phi i32 [ 0, %bb ], [ %tmp5, %bb1 ]
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ret i32 %tmp8
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}
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