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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes='require<loops>,gvn' -S | FileCheck -check-prefix=CHECK-PRE %s3; RUN: opt < %s -passes='require<loops>,gvn,sccp' -S | FileCheck -check-prefix=CHECK-SCCP %s4 5@b = external global i32, align 46 7define void @main(i1 %cond) {8; CHECK-PRE-LABEL: @main(9; CHECK-PRE-NEXT: entry:10; CHECK-PRE-NEXT: store i32 0, ptr @b, align 411; CHECK-PRE-NEXT: br label [[WHILE_BODY3:%.*]]12; CHECK-PRE: while.cond.loopexit.loopexit:13; CHECK-PRE-NEXT: ret void14; CHECK-PRE: while.body3:15; CHECK-PRE-NEXT: [[TMP0:%.*]] = phi i32 [ [[TMP1:%.*]], [[IF_END:%.*]] ], [ 0, [[ENTRY:%.*]] ]16; CHECK-PRE-NEXT: [[TOBOOL4_NOT:%.*]] = icmp eq i32 [[TMP0]], 017; CHECK-PRE-NEXT: br i1 [[TOBOOL4_NOT]], label [[IF_END]], label [[IF_THEN:%.*]]18; CHECK-PRE: if.then:19; CHECK-PRE-NEXT: tail call void @foo()20; CHECK-PRE-NEXT: [[DOTPRE:%.*]] = load i32, ptr @b, align 421; CHECK-PRE-NEXT: br label [[IF_END]]22; CHECK-PRE: if.end:23; CHECK-PRE-NEXT: [[TMP1]] = phi i32 [ [[DOTPRE]], [[IF_THEN]] ], [ 0, [[WHILE_BODY3]] ]24; CHECK-PRE-NEXT: br i1 [[COND:%.*]], label [[WHILE_COND_LOOPEXIT_LOOPEXIT:%.*]], label [[WHILE_BODY3]]25;26; CHECK-SCCP-LABEL: @main(27; CHECK-SCCP-NEXT: entry:28; CHECK-SCCP-NEXT: store i32 0, ptr @b, align 429; CHECK-SCCP-NEXT: br label [[WHILE_BODY3:%.*]]30; CHECK-SCCP: while.cond.loopexit.loopexit:31; CHECK-SCCP-NEXT: ret void32; CHECK-SCCP: while.body3:33; CHECK-SCCP-NEXT: br label [[IF_END:%.*]]34; CHECK-SCCP: if.end:35; CHECK-SCCP-NEXT: br i1 [[COND:%.*]], label [[WHILE_COND_LOOPEXIT_LOOPEXIT:%.*]], label [[WHILE_BODY3]]36;37entry:38 store i32 0, ptr @b39 br label %while.body3.lr.ph40 41while.cond.loopexit.loopexit: ; preds = %if.end42 ret void43 44while.body3.lr.ph: ; preds = %while.cond1.preheader45 %0 = load i32, ptr @b, align 446 %1 = icmp eq i32 %0, 047 br label %while.body348 49while.body3: ; preds = %if.end, %while.body3.lr.ph50 %2 = load i32, ptr @b, align 451 %tobool4.not = icmp eq i32 %2, 052 br i1 %tobool4.not, label %if.end, label %if.then53 54if.then: ; preds = %while.body355 tail call void @foo()56 br label %if.end57 58if.end: ; preds = %if.then, %while.body359 br i1 %cond, label %while.cond.loopexit.loopexit, label %while.body360}61 62declare void @foo()63 64