1 ; RUN: opt < %s -loop-reduce -mtriple=x86_64-- -S | FileCheck %s -check-prefix=BOTH -check-prefix=INSN
2 ; RUN: opt < %s -loop-reduce -mtriple=x86_64-- -lsr-insns-cost=false -S | FileCheck %s -check-prefix=BOTH -check-prefix=REGS
3 ; RUN: llc < %s -O2 -mtriple=x86_64-- -lsr-insns-cost -asm-verbose=0 | FileCheck %s
5 ; OPT checks that LSR prefers less instructions to less registers.
6 ; For x86 LSR should prefer complicated address to new lsr induction
10 ; INSN: [[OFFSET1:%.+]] = shl nuw nsw i64 %indvars.iv, 2
11 ; INSN: getelementptr i8, ptr %x, i64 [[OFFSET1]]
12 ; INSN: [[OFFSET2:%.+]] = shl nuw nsw i64 %indvars.iv, 2
13 ; INSN: getelementptr i8, ptr %y, i64 [[OFFSET2]]
14 ; INSN: [[OFFSET3:%.+]] = shl nuw nsw i64 %indvars.iv, 2
15 ; INSN: getelementptr i8, ptr %q, i64 [[OFFSET3]]
16 ; REGS: %lsr.iv4 = phi
17 ; REGS: %lsr.iv2 = phi
18 ; REGS: %lsr.iv1 = phi
19 ; REGS: getelementptr i8, ptr %lsr.iv1, i64 4
20 ; REGS: getelementptr i8, ptr %lsr.iv2, i64 4
21 ; REGS: getelementptr i8, ptr %lsr.iv4, i64 4
23 ; LLC checks that LSR prefers less instructions to less registers.
24 ; LSR should prefer complicated address to additonal add instructions.
27 ; CHECK-NEXT: movl (%r{{.+}},{{.*}}), [[REG:%[a-z0-9]+]]
28 ; CHECK-NEXT: addl (%r{{.+}},{{.*}}), [[REG]]
29 ; CHECK-NEXT: movl [[REG]], (%{{.*}})
31 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
33 ; Function Attrs: norecurse nounwind uwtable
34 define void @foo(ptr nocapture readonly %x, ptr nocapture readonly %y, ptr nocapture %q, i32 %n) {
36 %cmp10 = icmp sgt i32 %n, 0
37 br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup
39 for.body.preheader: ; preds = %entry
40 %wide.trip.count = zext i32 %n to i64
43 for.cond.cleanup.loopexit: ; preds = %for.body
44 br label %for.cond.cleanup
46 for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
49 for.body: ; preds = %for.body, %for.body.preheader
50 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
51 %arrayidx = getelementptr inbounds i32, ptr %x, i64 %indvars.iv
52 %tmp = load i32, ptr %arrayidx, align 4
53 %arrayidx2 = getelementptr inbounds i32, ptr %y, i64 %indvars.iv
54 %tmp1 = load i32, ptr %arrayidx2, align 4
55 %add = add nsw i32 %tmp1, %tmp
56 %arrayidx4 = getelementptr inbounds i32, ptr %q, i64 %indvars.iv
57 store i32 %add, ptr %arrayidx4, align 4
58 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
59 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
60 br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body