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; RUN: llc -verify-regalloc -verify-machineinstrs < %s
; PR27275: When enabling remat for vreg defined by PHIs, make sure the update
; of the live range removes dead phi. Otherwise, we may end up with PHIs with
; incorrect operands and that will trigger assertions or verifier failures
; in later passes.
target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
target triple = "i386-unknown-linux-gnu"
@b = external global i64, align 8
@d = external global i32, align 4
@e = external global i64, align 8
@h = external global i16, align 2
@a = external global i8, align 1
@g = external global i64, align 8
@j = external global i32, align 4
@f = external global i16, align 2
@.str = external unnamed_addr constant [12 x i8], align 1
define void @fn1() {
entry:
%tmp = load i64, i64* @b, align 8
%or = or i64 0, 3299921317
%and = and i64 %or, %tmp
%tmp1 = load i32, i32* @d, align 4
br i1 undef, label %lor.rhs, label %lor.end
lor.rhs: ; preds = %entry
%tobool3 = icmp ne i8 undef, 0
br label %lor.end
lor.end: ; preds = %lor.rhs, %entry
%lor.ext = zext i1 undef to i32
%tmp2 = load i64, i64* @e, align 8
br i1 undef, label %lor.rhs5, label %lor.end7
lor.rhs5: ; preds = %lor.end
br label %lor.end7
lor.end7: ; preds = %lor.rhs5, %lor.end
%tmp3 = phi i1 [ true, %lor.end ], [ false, %lor.rhs5 ]
%neg13 = xor i64 %tmp, -1
%conv25 = zext i1 %tmp3 to i32
%tobool46 = icmp eq i64 %tmp, 0
%.pre = load i16, i16* @h, align 2
%tobool10 = icmp eq i16 %.pre, 0
%neg.us = xor i32 %tmp1, -1
%conv12.us = sext i32 %neg.us to i64
%tobool23.us = icmp eq i64 %tmp2, %and
%conv39.us = sext i32 %tmp1 to i64
br label %LABEL_mSmSDb
LABEL_mSmSDb.loopexit: ; preds = %lor.end32.us
%conv42.us.lcssa = phi i32 [ %conv42.us, %lor.end32.us ]
store i64 undef, i64* @g, align 8
br label %LABEL_mSmSDb
LABEL_mSmSDb: ; preds = %LABEL_mSmSDb.loopexit, %lor.end7
%tmp4 = phi i32 [ undef, %lor.end7 ], [ %conv42.us.lcssa, %LABEL_mSmSDb.loopexit ]
%tmp5 = phi i64 [ %tmp, %lor.end7 ], [ 0, %LABEL_mSmSDb.loopexit ]
br i1 %tobool10, label %LABEL_BRBRN.preheader, label %if.then
if.then: ; preds = %LABEL_mSmSDb
store i8 undef, i8* @a, align 1
br label %LABEL_BRBRN.preheader
LABEL_BRBRN.preheader: ; preds = %if.then, %LABEL_mSmSDb
%.pre63 = load i64, i64* @g, align 8
br i1 %tobool46, label %LABEL_BRBRN.us, label %LABEL_BRBRN.outer
LABEL_BRBRN.outer: ; preds = %if.then47, %LABEL_BRBRN.preheader
%.ph = phi i32 [ 0, %if.then47 ], [ %tmp4, %LABEL_BRBRN.preheader ]
%.ph64 = phi i32 [ %conv50, %if.then47 ], [ %tmp1, %LABEL_BRBRN.preheader ]
%.ph65 = phi i64 [ %tmp16, %if.then47 ], [ %.pre63, %LABEL_BRBRN.preheader ]
%.ph66 = phi i64 [ 0, %if.then47 ], [ %tmp2, %LABEL_BRBRN.preheader ]
%.ph67 = phi i64 [ %.pre56.pre, %if.then47 ], [ %tmp5, %LABEL_BRBRN.preheader ]
%neg = xor i32 %.ph64, -1
%conv12 = sext i32 %neg to i64
%tobool23 = icmp eq i64 %.ph66, %and
%tmp6 = load i32, i32* @j, align 4
%shr = lshr i32 %conv25, %tmp6
%conv39 = sext i32 %.ph64 to i64
br label %LABEL_BRBRN
LABEL_BRBRN.us: ; preds = %lor.end32.us, %LABEL_BRBRN.preheader
%tmp7 = phi i32 [ %conv42.us, %lor.end32.us ], [ %tmp4, %LABEL_BRBRN.preheader ]
%tmp8 = phi i64 [ undef, %lor.end32.us ], [ %.pre63, %LABEL_BRBRN.preheader ]
%tmp9 = phi i64 [ %tmp10, %lor.end32.us ], [ %tmp5, %LABEL_BRBRN.preheader ]
%mul.us = mul i64 %tmp8, %neg13
%mul14.us = mul i64 %mul.us, %conv12.us
%cmp.us = icmp sgt i64 %tmp2, %mul14.us
%conv16.us = zext i1 %cmp.us to i64
%xor.us = xor i64 %conv16.us, %tmp9
%rem18.us = urem i32 %lor.ext, %tmp7
%conv19.us = zext i32 %rem18.us to i64
br i1 %tobool23.us, label %lor.rhs24.us, label %lor.end32.us
lor.rhs24.us: ; preds = %LABEL_BRBRN.us
br label %lor.end32.us
lor.end32.us: ; preds = %lor.rhs24.us, %LABEL_BRBRN.us
%tmp10 = phi i64 [ -2, %LABEL_BRBRN.us ], [ -1, %lor.rhs24.us ]
%xor.us.not = xor i64 %xor.us, -1
%neg36.us = and i64 %conv19.us, %xor.us.not
%conv37.us = zext i32 %tmp7 to i64
%sub38.us = sub nsw i64 %neg36.us, %conv37.us
%mul40.us = mul nsw i64 %sub38.us, %conv39.us
%neg41.us = xor i64 %mul40.us, 4294967295
%conv42.us = trunc i64 %neg41.us to i32
%tobool43.us = icmp eq i8 undef, 0
br i1 %tobool43.us, label %LABEL_mSmSDb.loopexit, label %LABEL_BRBRN.us
LABEL_BRBRN: ; preds = %lor.end32, %LABEL_BRBRN.outer
%tmp11 = phi i32 [ %conv42, %lor.end32 ], [ %.ph, %LABEL_BRBRN.outer ]
%tmp12 = phi i64 [ %neg21, %lor.end32 ], [ %.ph65, %LABEL_BRBRN.outer ]
%tmp13 = phi i64 [ %conv35, %lor.end32 ], [ %.ph67, %LABEL_BRBRN.outer ]
%mul = mul i64 %tmp12, %neg13
%mul14 = mul i64 %mul, %conv12
%cmp = icmp sgt i64 %.ph66, %mul14
%conv16 = zext i1 %cmp to i64
%xor = xor i64 %conv16, %tmp13
%rem18 = urem i32 %lor.ext, %tmp11
%conv19 = zext i32 %rem18 to i64
%neg21 = or i64 %xor, undef
br i1 %tobool23, label %lor.rhs24, label %lor.end32
lor.rhs24: ; preds = %LABEL_BRBRN
%tmp14 = load volatile i16, i16* @f, align 2
%conv26 = sext i16 %tmp14 to i32
%and27 = and i32 %conv26, %shr
%conv28 = sext i32 %and27 to i64
%mul29 = mul nsw i64 %conv28, %tmp
%and30 = and i64 %mul29, %tmp13
%tobool31 = icmp ne i64 %and30, 0
br label %lor.end32
lor.end32: ; preds = %lor.rhs24, %LABEL_BRBRN
%tmp15 = phi i1 [ true, %LABEL_BRBRN ], [ %tobool31, %lor.rhs24 ]
%lor.ext33 = zext i1 %tmp15 to i32
%neg34 = xor i32 %lor.ext33, -1
%conv35 = sext i32 %neg34 to i64
%xor.not = xor i64 %xor, -1
%neg36 = and i64 %conv19, %xor.not
%conv37 = zext i32 %tmp11 to i64
%sub38 = sub nsw i64 %neg36, %conv37
%mul40 = mul nsw i64 %sub38, %conv39
%neg41 = xor i64 %mul40, 4294967295
%conv42 = trunc i64 %neg41 to i32
%tobool43 = icmp eq i8 undef, 0
br i1 %tobool43, label %if.then47, label %LABEL_BRBRN
if.then47: ; preds = %lor.end32
tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i64 %conv39)
%tmp16 = load i64, i64* @g, align 8
%neg49 = xor i64 %tmp16, 4294967295
%conv50 = trunc i64 %neg49 to i32
%.pre56.pre = load i64, i64* @b, align 8
br label %LABEL_BRBRN.outer
}
declare void @printf(i8* nocapture readonly, ...)
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