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; RUN: opt -S -newgvn %s | FileCheck %s
; CHECK: define i32 @main() {
; CHECK-NEXT: entry:
; CHECK-NEXT: %tmp = load i32, i32* @d, align 4
; CHECK-NEXT: %tmp1 = load i32, i32* @c, align 4
; CHECK-NEXT: %tobool = icmp eq i32 %tmp1, -1
; CHECK-NEXT: br i1 %tobool, label %if.end, label %if.then
; CHECK: if.then:
; CHECK-NEXT: br label %L
; CHECK: L:
; CHECK-NEXT: %e.0 = phi i32 [ 0, %if.then ], [ %e.1, %if.then4 ]
; CHECK-NEXT: br label %if.end
; CHECK: if.end:
; CHECK-NEXT: %e.1 = phi i32 [ %e.0, %L ], [ %tmp, %entry ]
; CHECK-NEXT: store i32 %e.1, i32* @a, align 4
; CHECK-NEXT: %tmp2 = load i32, i32* @b, align 4
; CHECK-NEXT: store i32 0, i32* @b, align 4
; CHECK-NEXT: %sext = shl i32 %tmp2, 16
; CHECK-NEXT: %conv1 = ashr exact i32 %sext, 16
; CHECK-NEXT: %add = add nsw i32 %conv1, %tmp1
; CHECK-NEXT: %add2 = add nsw i32 %add, %e.1
; CHECK-NEXT: store i32 %add2, i32* @a, align 4
; CHECK-NEXT: %tobool3 = icmp eq i32 %add2, 0
; CHECK-NEXT: br i1 %tobool3, label %if.end5, label %if.then4
; CHECK: if.then4:
; CHECK-NEXT: br label %L
; CHECK: if.end5:
; CHECK-NEXT: ret i32 0
; CHECK-NEXT: }
@d = global i32 1, align 4
@c = common global i32 0, align 4
@a = common global i32 0, align 4
@b = common global i32 0, align 4
define i32 @main() {
entry:
%tmp = load i32, i32* @d, align 4
%tmp1 = load i32, i32* @c, align 4
%tobool = icmp eq i32 %tmp1, -1
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
br label %L
L: ; preds = %if.then4, %if.then
%e.0 = phi i32 [ 0, %if.then ], [ %e.1, %if.then4 ]
br label %if.end
if.end: ; preds = %L, %entry
%e.1 = phi i32 [ %e.0, %L ], [ %tmp, %entry ]
store i32 %e.1, i32* @a, align 4
%tmp2 = load i32, i32* @b, align 4
store i32 0, i32* @b, align 4
%sext = shl i32 %tmp2, 16
%conv1 = ashr exact i32 %sext, 16
%tmp3 = load i32, i32* @c, align 4
%add = add nsw i32 %conv1, %tmp3
%tmp4 = load i32, i32* @a, align 4
%and = and i32 %tmp4, %e.1
%add2 = add nsw i32 %add, %and
store i32 %add2, i32* @a, align 4
%tobool3 = icmp eq i32 %add2, 0
br i1 %tobool3, label %if.end5, label %if.then4
if.then4: ; preds = %if.end
br label %L
if.end5: ; preds = %if.end
ret i32 0
}
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