1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -loop-reduce < %s | FileCheck %s 3 4target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 5 6define void @test(ptr %p.base, i8 %x) { 7; CHECK-LABEL: @test( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: switch i8 [[X:%.*]], label [[WHILE_END:%.*]] [ 10; CHECK-NEXT: i8 10, label [[WHILE_BODY_PREHEADER:%.*]] 11; CHECK-NEXT: i8 20, label [[WHILE_BODY_PREHEADER]] 12; CHECK-NEXT: ] 13; CHECK: while.body.preheader: 14; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[P_BASE:%.*]], i64 1 15; CHECK-NEXT: br label [[WHILE_BODY:%.*]] 16; CHECK: while.body: 17; CHECK-NEXT: [[LSR_IV:%.*]] = phi ptr [ [[SCEVGEP1:%.*]], [[WHILE_BODY_BACKEDGE:%.*]] ], [ [[SCEVGEP]], [[WHILE_BODY_PREHEADER]] ] 18; CHECK-NEXT: [[Y:%.*]] = load i8, ptr [[LSR_IV]], align 1 19; CHECK-NEXT: switch i8 [[Y]], label [[WHILE_END_LOOPEXIT:%.*]] [ 20; CHECK-NEXT: i8 10, label [[WHILE_BODY_BACKEDGE]] 21; CHECK-NEXT: i8 20, label [[WHILE_BODY_BACKEDGE]] 22; CHECK-NEXT: ] 23; CHECK: while.body.backedge: 24; CHECK-NEXT: [[SCEVGEP1]] = getelementptr i8, ptr [[LSR_IV]], i64 1 25; CHECK-NEXT: br label [[WHILE_BODY]] 26; CHECK: while.end.loopexit: 27; CHECK-NEXT: br label [[WHILE_END]] 28; CHECK: while.end: 29; CHECK-NEXT: ret void 30; 31entry: 32 switch i8 %x, label %while.end [ 33 i8 10, label %while.body 34 i8 20, label %while.body 35 ] 36 37while.body: 38 %p = phi ptr [ %p.inc, %while.body ], [ %p.inc, %while.body ], [ %p.base, %entry ], [ %p.base, %entry ] 39 %p.inc = getelementptr inbounds i8, ptr %p, i64 1 40 %y = load i8, ptr %p.inc, align 1 41 switch i8 %y, label %while.end [ 42 i8 10, label %while.body 43 i8 20, label %while.body 44 ] 45 46while.end: 47 ret void 48} 49