live-range-nosubreg.ll
1.46 KB
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; RUN: llc < %s
; This testcase used to crash. See PR29132.
target triple = "x86_64-unknown-linux-gnu"
@a = common local_unnamed_addr global i16 0, align 2
@c = common global i32 0, align 4
@d = common local_unnamed_addr global i8 0, align 1
@b = common global i32 0, align 4
; Function Attrs: norecurse nounwind optsize uwtable
define i32 @main() local_unnamed_addr #0 {
entry:
%0 = load volatile i32, i32* @c, align 4
%tobool = icmp eq i32 %0, 0
%1 = load i16, i16* @a, align 2
br i1 %tobool, label %lor.rhs, label %lor.end
lor.rhs: ; preds = %entry
%inc = add i16 %1, 1
store i16 %inc, i16* @a, align 2
br label %lor.end
lor.end: ; preds = %entry, %lor.rhs
%2 = phi i16 [ %inc, %lor.rhs ], [ %1, %entry ]
%dec = add i16 %2, -1
store i16 %dec, i16* @a, align 2
%3 = load i8, i8* @d, align 1
%sub = sub i8 0, %3
%tobool4 = icmp eq i16 %dec, 0
br i1 %tobool4, label %land.end, label %land.rhs
land.rhs: ; preds = %lor.end
%4 = load volatile i32, i32* @b, align 4
%tobool5 = icmp ne i32 %4, 0
br label %land.end
land.end: ; preds = %lor.end, %land.rhs
%5 = phi i1 [ false, %lor.end ], [ %tobool5, %land.rhs ]
%land.ext = zext i1 %5 to i8
%or = or i8 %land.ext, %sub
store i8 %or, i8* @d, align 1
ret i32 0
}
attributes #0 = { norecurse nounwind optsize uwtable "target-cpu"="x86-64" }