blob: 58ffe68efffb74b7ee2094a44585cba5c0849b48 [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-reduce -S < %s | FileCheck %s
;
; Test LSR's use of SplitCriticalEdge during phi rewriting.
target triple = "x86_64-apple-darwin"
; Provide legal integer types.
target datalayout = "n8:16:32:64"
; Verify that identical edges are merged. rdar://problem/6453893
define i8* @test1() {
;
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i8* [ [[SCEVGEP:%.*]], [[LOOP]] ], [ null, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, i8* [[LSR_IV]], i64 1
; CHECK-NEXT: br i1 false, label [[LOOP]], label [[LOOPEXIT:%.*]]
; CHECK: loopexit:
; CHECK-NEXT: br i1 false, label [[BBA:%.*]], label [[BBB:%.*]]
; CHECK: bbA:
; CHECK-NEXT: switch i32 0, label [[BBA_BB89_CRIT_EDGE:%.*]] [
; CHECK-NEXT: i32 47, label [[BBA_BB89_CRIT_EDGE]]
; CHECK-NEXT: i32 58, label [[BBA_BB89_CRIT_EDGE]]
; CHECK-NEXT: ]
; CHECK: bbA.bb89_crit_edge:
; CHECK-NEXT: br label [[BB89:%.*]]
; CHECK: bbB:
; CHECK-NEXT: switch i8 0, label [[BBB_BB89_CRIT_EDGE:%.*]] [
; CHECK-NEXT: i8 47, label [[BBB_BB89_CRIT_EDGE]]
; CHECK-NEXT: i8 58, label [[BBB_BB89_CRIT_EDGE]]
; CHECK-NEXT: ]
; CHECK: bbB.bb89_crit_edge:
; CHECK-NEXT: br label [[BB89]]
; CHECK: bb89:
; CHECK-NEXT: [[TMP75PHI:%.*]] = phi i8* [ [[SCEVGEP]], [[BBA_BB89_CRIT_EDGE]] ], [ [[SCEVGEP]], [[BBB_BB89_CRIT_EDGE]] ]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i8* [[TMP75PHI]]
;
entry:
br label %loop
loop:
%rec = phi i32 [ %next, %loop ], [ 0, %entry ]
%next = add i32 %rec, 1
%tmp75 = getelementptr i8, i8* null, i32 %next
br i1 false, label %loop, label %loopexit
loopexit:
br i1 false, label %bbA, label %bbB
bbA:
switch i32 0, label %bb89 [
i32 47, label %bb89
i32 58, label %bb89
]
bbB:
switch i8 0, label %bb89 [
i8 47, label %bb89
i8 58, label %bb89
]
bb89:
%tmp75phi = phi i8* [ %tmp75, %bbA ], [ %tmp75, %bbA ], [ %tmp75, %bbA ], [ %tmp75, %bbB ], [ %tmp75, %bbB ], [ %tmp75, %bbB ]
br label %exit
exit:
ret i8* %tmp75phi
}
; Handle single-predecessor phis: PR13756
define i8* @test2() {
;
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i8* [ [[SCEVGEP:%.*]], [[LOOP]] ], [ null, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, i8* [[LSR_IV]], i64 1
; CHECK-NEXT: br i1 false, label [[LOOP]], label [[LOOPEXIT:%.*]]
; CHECK: loopexit:
; CHECK-NEXT: br i1 false, label [[BBA:%.*]], label [[BBB:%.*]]
; CHECK: bbA:
; CHECK-NEXT: switch i32 0, label [[BB89:%.*]] [
; CHECK-NEXT: i32 47, label [[BB89]]
; CHECK-NEXT: i32 58, label [[BB89]]
; CHECK-NEXT: ]
; CHECK: bbB:
; CHECK-NEXT: switch i8 0, label [[BBB_EXIT_CRIT_EDGE:%.*]] [
; CHECK-NEXT: i8 47, label [[BBB_EXIT_CRIT_EDGE]]
; CHECK-NEXT: i8 58, label [[BBB_EXIT_CRIT_EDGE]]
; CHECK-NEXT: ]
; CHECK: bbB.exit_crit_edge:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: bb89:
; CHECK-NEXT: [[TMP75PHI:%.*]] = phi i8* [ [[SCEVGEP]], [[BBA]] ], [ [[SCEVGEP]], [[BBA]] ], [ [[SCEVGEP]], [[BBA]] ]
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RESULT:%.*]] = phi i8* [ [[TMP75PHI]], [[BB89]] ], [ [[SCEVGEP]], [[BBB_EXIT_CRIT_EDGE]] ]
; CHECK-NEXT: ret i8* [[RESULT]]
;
entry:
br label %loop
loop:
%rec = phi i32 [ %next, %loop ], [ 0, %entry ]
%next = add i32 %rec, 1
%tmp75 = getelementptr i8, i8* null, i32 %next
br i1 false, label %loop, label %loopexit
loopexit:
br i1 false, label %bbA, label %bbB
bbA:
switch i32 0, label %bb89 [
i32 47, label %bb89
i32 58, label %bb89
]
bbB:
switch i8 0, label %exit [
i8 47, label %exit
i8 58, label %exit
]
bb89:
%tmp75phi = phi i8* [ %tmp75, %bbA ], [ %tmp75, %bbA ], [ %tmp75, %bbA ]
br label %exit
exit:
%result = phi i8* [ %tmp75phi, %bb89 ], [ %tmp75, %bbB ], [ %tmp75, %bbB ], [ %tmp75, %bbB ]
ret i8* %result
}