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Fix PR23384 (under "-lsr-insns-cost" option)
Summary: The patch adds instructions number generated by a solution to LSR cost under "-lsr-insns-cost" option. Reviewers: qcolombet, hfinkel Differential Revision: http://reviews.llvm.org/D28307 From: Evgeny Stupachenko <evstupac@gmail.com> llvm-svn: 294821
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52 changes: 52 additions & 0 deletions
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llvm/test/Transforms/LoopStrengthReduce/X86/lsr-insns-1.ll
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; RUN: opt < %s -loop-reduce -mtriple=x86_64 -lsr-insns-cost -S | FileCheck %s -check-prefix=BOTH -check-prefix=INSN | ||
; RUN: opt < %s -loop-reduce -mtriple=x86_64 -S | FileCheck %s -check-prefix=BOTH -check-prefix=REGS | ||
; RUN: llc < %s -O2 -march=x86-64 -lsr-insns-cost -asm-verbose=0 | FileCheck %s | ||
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; OPT test checks that LSR optimize compare for static counter to compare with 0. | ||
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; BOTH: for.body: | ||
; INSN: icmp eq i64 %lsr.iv.next, 0 | ||
; REGS: icmp eq i64 %indvars.iv.next, 1024 | ||
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; LLC test checks that LSR optimize compare for static counter. | ||
; That means that instead of creating the following: | ||
; movl %ecx, (%rdx,%rax,4) | ||
; incq %rax | ||
; cmpq $1024, %rax | ||
; LSR should optimize out cmp: | ||
; movl %ecx, 4096(%rdx,%rax) | ||
; addq $4, %rax | ||
; or | ||
; movl %ecx, 4096(%rdx,%rax,4) | ||
; incq %rax | ||
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; CHECK: LBB0_1: | ||
; CHECK-NEXT: movl 4096(%{{...}},[[REG:%...]] | ||
; CHECK-NEXT: addl 4096(%{{...}},[[REG]] | ||
; CHECK-NEXT: movl %{{...}}, 4096(%{{...}},[[REG]] | ||
; CHECK-NOT: cmp | ||
; CHECK: jne | ||
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" | ||
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; Function Attrs: norecurse nounwind uwtable | ||
define void @foo(i32* nocapture readonly %x, i32* nocapture readonly %y, i32* nocapture %q) { | ||
entry: | ||
br label %for.body | ||
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for.cond.cleanup: ; preds = %for.body | ||
ret void | ||
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for.body: ; preds = %for.body, %entry | ||
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] | ||
%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, 1024 | ||
br i1 %exitcond, label %for.cond.cleanup, label %for.body | ||
} |
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llvm/test/Transforms/LoopStrengthReduce/X86/lsr-insns-2.ll
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; RUN: opt < %s -loop-reduce -mtriple=x86_64 -lsr-insns-cost -S | FileCheck %s -check-prefix=BOTH -check-prefix=INSN | ||
; RUN: opt < %s -loop-reduce -mtriple=x86_64 -S | FileCheck %s -check-prefix=BOTH -check-prefix=REGS | ||
; RUN: llc < %s -O2 -march=x86-64 -lsr-insns-cost -asm-verbose=0 | FileCheck %s | ||
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; OPT checks that LSR prefers less instructions to less registers. | ||
; For x86 LSR should prefer complicated address to new lsr induction | ||
; variables. | ||
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; 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 | ||
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; LLC checks that LSR prefers less instructions to less registers. | ||
; LSR should prefer complicated address to additonal add instructions. | ||
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; CHECK: LBB0_2: | ||
; CHECK-NEXT: movl (%r{{[a-z][a-z]}}, | ||
; CHECK-NEXT: addl (%r{{[a-z][a-z]}}, | ||
; CHECK-NEXT: movl %e{{[a-z][a-z]}}, (%r{{[a-z][a-z]}}, | ||
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" | ||
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; 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 | ||
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for.body.preheader: ; preds = %entry | ||
%wide.trip.count = zext i32 %n to i64 | ||
br label %for.body | ||
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for.cond.cleanup.loopexit: ; preds = %for.body | ||
br label %for.cond.cleanup | ||
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry | ||
ret void | ||
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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 | ||
} |