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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -loops -gvn -S | FileCheck -check-prefix=CHECK-PRE %s
; RUN: opt < %s -loops -gvn -sccp -S | FileCheck -check-prefix=CHECK-SCCP %s
@b = external global i32, align 4
define void @main(i1 %cond) {
; CHECK-PRE-LABEL: @main(
; CHECK-PRE-NEXT: entry:
; CHECK-PRE-NEXT: store i32 0, i32* @b, align 4
; CHECK-PRE-NEXT: br label [[WHILE_BODY3:%.*]]
; CHECK-PRE: while.cond.loopexit.loopexit:
; CHECK-PRE-NEXT: ret void
; CHECK-PRE: while.body3:
; CHECK-PRE-NEXT: [[TMP0:%.*]] = phi i32 [ [[TMP1:%.*]], [[IF_END:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-PRE-NEXT: [[TOBOOL4_NOT:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-PRE-NEXT: br i1 [[TOBOOL4_NOT]], label [[IF_END]], label [[IF_THEN:%.*]]
; CHECK-PRE: if.then:
; CHECK-PRE-NEXT: tail call void @foo()
; CHECK-PRE-NEXT: [[DOTPRE:%.*]] = load i32, i32* @b, align 4
; CHECK-PRE-NEXT: br label [[IF_END]]
; CHECK-PRE: if.end:
; CHECK-PRE-NEXT: [[TMP1]] = phi i32 [ [[DOTPRE]], [[IF_THEN]] ], [ 0, [[WHILE_BODY3]] ]
; CHECK-PRE-NEXT: br i1 [[COND:%.*]], label [[WHILE_COND_LOOPEXIT_LOOPEXIT:%.*]], label [[WHILE_BODY3]]
;
; CHECK-SCCP-LABEL: @main(
; CHECK-SCCP-NEXT: entry:
; CHECK-SCCP-NEXT: store i32 0, i32* @b, align 4
; CHECK-SCCP-NEXT: br label [[WHILE_BODY3:%.*]]
; CHECK-SCCP: while.cond.loopexit.loopexit:
; CHECK-SCCP-NEXT: ret void
; CHECK-SCCP: while.body3:
; CHECK-SCCP-NEXT: br i1 true, label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK-SCCP: if.then:
; CHECK-SCCP-NEXT: br label [[IF_END]]
; CHECK-SCCP: if.end:
; CHECK-SCCP-NEXT: br i1 [[COND:%.*]], label [[WHILE_COND_LOOPEXIT_LOOPEXIT:%.*]], label [[WHILE_BODY3]]
;
entry:
store i32 0, i32* @b
br label %while.body3.lr.ph
while.cond.loopexit.loopexit: ; preds = %if.end
ret void
while.body3.lr.ph: ; preds = %while.cond1.preheader
%0 = load i32, i32* @b, align 4
%1 = icmp eq i32 %0, 0
br label %while.body3
while.body3: ; preds = %if.end, %while.body3.lr.ph
%2 = load i32, i32* @b, align 4
%tobool4.not = icmp eq i32 %2, 0
br i1 %tobool4.not, label %if.end, label %if.then
if.then: ; preds = %while.body3
tail call void @foo()
br label %if.end
if.end: ; preds = %if.then, %while.body3
br i1 %cond, label %while.cond.loopexit.loopexit, label %while.body3
}
declare void @foo()
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