| ; RUN: opt < %s -loop-reduce -mtriple=x86_64 -S | FileCheck %s -check-prefix=BOTH -check-prefix=INSN |
| ; RUN: opt < %s -loop-reduce -mtriple=x86_64 -lsr-insns-cost=false -S | FileCheck %s -check-prefix=BOTH -check-prefix=REGS |
| ; RUN: llc < %s -O2 -march=x86-64 -lsr-insns-cost -asm-verbose=0 | FileCheck %s |
| |
| ; OPT checks that LSR prefers less instructions to less registers. |
| ; For x86 LSR should prefer complicated address to new lsr induction |
| ; variables. |
| |
| ; BOTH: for.body: |
| ; INSN: getelementptr i32, i32* %x, i64 %indvars.iv |
| ; INSN: getelementptr i32, i32* %y, i64 %indvars.iv |
| ; INSN: getelementptr i32, i32* %q, i64 %indvars.iv |
| ; REGS %lsr.iv4 = phi |
| ; REGS %lsr.iv2 = phi |
| ; REGS %lsr.iv1 = phi |
| ; REGS: getelementptr i32, i32* %lsr.iv1, i64 1 |
| ; REGS: getelementptr i32, i32* %lsr.iv2, i64 1 |
| ; REGS: getelementptr i32, i32* %lsr.iv4, i64 1 |
| |
| ; LLC checks that LSR prefers less instructions to less registers. |
| ; LSR should prefer complicated address to additonal add instructions. |
| |
| ; CHECK: LBB0_2: |
| ; CHECK-NEXT: movl (%r{{.+}}, |
| ; CHECK-NEXT: addl (%r{{.+}}, |
| ; CHECK-NEXT: movl %e{{.+}}, (%r{{.+}}, |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; Function Attrs: norecurse nounwind uwtable |
| define void @foo(i32* nocapture readonly %x, i32* nocapture readonly %y, i32* nocapture %q, i32 %n) { |
| entry: |
| %cmp10 = icmp sgt i32 %n, 0 |
| br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup |
| |
| for.body.preheader: ; preds = %entry |
| %wide.trip.count = zext i32 %n to i64 |
| br label %for.body |
| |
| for.cond.cleanup.loopexit: ; preds = %for.body |
| br label %for.cond.cleanup |
| |
| for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry |
| ret void |
| |
| for.body: ; preds = %for.body, %for.body.preheader |
| %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %x, i64 %indvars.iv |
| %tmp = load i32, i32* %arrayidx, align 4 |
| %arrayidx2 = getelementptr inbounds i32, i32* %y, i64 %indvars.iv |
| %tmp1 = load i32, i32* %arrayidx2, align 4 |
| %add = add nsw i32 %tmp1, %tmp |
| %arrayidx4 = getelementptr inbounds i32, i32* %q, i64 %indvars.iv |
| store i32 %add, i32* %arrayidx4, align 4 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count |
| br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body |
| } |