; RUN: opt -passes=loop-idiom -mtriple=amdgcn-- -S < %s | FileCheck %s
; Mostly copied from x86 version.
;To recognize this pattern:
;int popcount(unsigned long long a) {
; int c = 0;
; while (a) {
; c++;
; a &= a - 1;
; }
; return c;
;}
;
; CHECK-LABEL: @popcount_i64
; CHECK: entry
; CHECK: llvm.ctpop.i64
; CHECK: ret
define i32 @popcount_i64(i64 %a) nounwind uwtable readnone ssp {
entry:
%tobool3 = icmp eq i64 %a, 0
br i1 %tobool3, label %while.end, label %while.body
while.body: ; preds = %entry, %while.body
%c.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%a.addr.04 = phi i64 [ %and, %while.body ], [ %a, %entry ]
%inc = add nsw i32 %c.05, 1
%sub = add i64 %a.addr.04, -1
%and = and i64 %sub, %a.addr.04
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
%c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ]
ret i32 %c.0.lcssa
}
; CHECK-LABEL: @popcount_i32
; CHECK: entry
; CHECK: llvm.ctpop.i32
; CHECK: ret
define i32 @popcount_i32(i32 %a) nounwind uwtable readnone ssp {
entry:
%tobool3 = icmp eq i32 %a, 0
br i1 %tobool3, label %while.end, label %while.body
while.body: ; preds = %entry, %while.body
%c.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%a.addr.04 = phi i32 [ %and, %while.body ], [ %a, %entry ]
%inc = add nsw i32 %c.05, 1
%sub = add i32 %a.addr.04, -1
%and = and i32 %sub, %a.addr.04
%tobool = icmp eq i32 %and, 0
br i1 %tobool, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
%c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ]
ret i32 %c.0.lcssa
}
; CHECK-LABEL: @popcount_i128
; CHECK: entry
; CHECK: llvm.ctpop.i128
; CHECK: ret
define i32 @popcount_i128(i128 %a) nounwind uwtable readnone ssp {
entry:
%tobool3 = icmp eq i128 %a, 0
br i1 %tobool3, label %while.end, label %while.body
while.body: ; preds = %entry, %while.body
%c.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%a.addr.04 = phi i128 [ %and, %while.body ], [ %a, %entry ]
%inc = add nsw i32 %c.05, 1
%sub = add i128 %a.addr.04, -1
%and = and i128 %sub, %a.addr.04
%tobool = icmp eq i128 %and, 0
br i1 %tobool, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
%c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ]
ret i32 %c.0.lcssa
}
; To recognize this pattern:
;int popcount(unsigned long long a, int mydata1, int mydata2) {
; int c = 0;
; while (a) {
; c++;
; a &= a - 1;
; mydata1 *= c;
; mydata2 *= (int)a;
; }
; return c + mydata1 + mydata2;
;}
; CHECK-LABEL: @popcount2
; CHECK: entry
; CHECK: llvm.ctpop.i64
; CHECK: ret
define i32 @popcount2(i64 %a, i32 %mydata1, i32 %mydata2) nounwind uwtable readnone ssp {
entry:
%tobool9 = icmp eq i64 %a, 0
br i1 %tobool9, label %while.end, label %while.body
while.body: ; preds = %entry, %while.body
%c.013 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%mydata2.addr.012 = phi i32 [ %mul1, %while.body ], [ %mydata2, %entry ]
%mydata1.addr.011 = phi i32 [ %mul, %while.body ], [ %mydata1, %entry ]
%a.addr.010 = phi i64 [ %and, %while.body ], [ %a, %entry ]
%inc = add nsw i32 %c.013, 1
%sub = add i64 %a.addr.010, -1
%and = and i64 %sub, %a.addr.010
%mul = mul nsw i32 %inc, %mydata1.addr.011
%conv = trunc i64 %and to i32
%mul1 = mul nsw i32 %conv, %mydata2.addr.012
%tobool = icmp eq i64 %and, 0
br i1 %tobool, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
%c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ]
%mydata2.addr.0.lcssa = phi i32 [ %mydata2, %entry ], [ %mul1, %while.body ]
%mydata1.addr.0.lcssa = phi i32 [ %mydata1, %entry ], [ %mul, %while.body ]
%add = add i32 %mydata2.addr.0.lcssa, %mydata1.addr.0.lcssa
%add2 = add i32 %add, %c.0.lcssa
ret i32 %add2
}
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