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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -indvars -loop-deletion -simplifycfg -S | FileCheck %s
; Testcase distilled from 256.bzip2
define i32 @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret i32 364
;
entry:
br label %loopentry
loopentry: ; preds = %loopentry, %entry
%indvar1 = phi i32 [ 0, %entry ], [ %indvar.next2, %loopentry ] ; <i32> [#uses=1]
%h.0 = phi i32 [ %tmp.2, %loopentry ], [ 4, %entry ] ; <i32> [#uses=1]
%tmp.1 = mul i32 %h.0, 3 ; <i32> [#uses=1]
%tmp.2 = add i32 %tmp.1, 1 ; <i32> [#uses=2]
%indvar.next2 = add i32 %indvar1, 1 ; <i32> [#uses=2]
%exitcond3 = icmp ne i32 %indvar.next2, 4 ; <i1> [#uses=1]
br i1 %exitcond3, label %loopentry, label %loopexit
loopexit: ; preds = %loopentry
ret i32 %tmp.2
}
; PR12377
define i32 @test2(i32 %arg) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: bb:
; CHECK-NEXT: [[TMP:%.*]] = icmp ugt i32 [[ARG:%.*]], 10
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[ARG]], -11
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[TMP0]], 1
; CHECK-NEXT: [[TMP2:%.*]] = add nuw i32 [[TMP1]], 1
; CHECK-NEXT: [[TMP8:%.*]] = select i1 [[TMP]], i32 [[TMP2]], i32 0
; CHECK-NEXT: ret i32 [[TMP8]]
;
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
}
|