8a3d7c9cbd
Quite a while ago, we implemented a pass that will reduce the number of CR-logical operations we emit. It does so by converting a CR-logical operation into a branch. We have kept this off by default because it seemed to cause a significant regression with one benchmark. However, that regression turned out to be due to a completely unrelated reason - AADB introducing a self-copy that is a priority-setting nop and it was just exacerbated by this pass. Now that we understand the reason for the only degradation, we can turn this pass on by default. We have long since fixed the cause for the degradation. Differential revision: https://reviews.llvm.org/D52431 llvm-svn: 375152
68 lines
2.5 KiB
LLVM
68 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mcpu=pwr8 -ppc-asm-full-reg-names \
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; RUN: -mtriple=powerpc64le-unknown-unknown < %s | FileCheck %s
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define dso_local void @test(void (i32)* nocapture %fp, i32 signext %Arg, i32 signext %Len) local_unnamed_addr #0 {
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; CHECK-LABEL: test:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: .cfi_def_cfa_offset 64
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; CHECK-NEXT: .cfi_offset lr, 16
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; CHECK-NEXT: .cfi_offset r28, -32
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; CHECK-NEXT: .cfi_offset r29, -24
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; CHECK-NEXT: .cfi_offset r30, -16
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; CHECK-NEXT: std r28, -32(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r29, -24(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -64(r1)
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; CHECK-NEXT: mr r29, r5
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; CHECK-NEXT: mr r30, r3
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; CHECK-NEXT: extsw r28, r4
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; CHECK-NEXT: std r2, 24(r1)
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; CHECK-NEXT: cmpwi r29, 1
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; CHECK-NEXT: bc 12, lt, .LBB0_3
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; CHECK-NEXT: # %bb.1: # %entry
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; CHECK-NEXT: cmpwi cr0, r4, 11
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; CHECK-NEXT: bc 12, lt, .LBB0_3
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; CHECK-NEXT: .p2align 5
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; CHECK-NEXT: .LBB0_2: # %for.body.us
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; CHECK-NEXT: #
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; CHECK-NEXT: mtctr r30
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; CHECK-NEXT: mr r3, r28
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; CHECK-NEXT: mr r12, r30
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; CHECK-NEXT: bctrl
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; CHECK-NEXT: ld 2, 24(r1)
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; CHECK-NEXT: addi r29, r29, -1
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; CHECK-NEXT: cmplwi r29, 0
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; CHECK-NEXT: bne cr0, .LBB0_2
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; CHECK-NEXT: .LBB0_3: # %for.cond.cleanup
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; CHECK-NEXT: mtctr r30
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; CHECK-NEXT: mr r3, r28
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; CHECK-NEXT: mr r12, r30
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; CHECK-NEXT: bctrl
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; CHECK-NEXT: ld 2, 24(r1)
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; CHECK-NEXT: addi r1, r1, 64
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
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; CHECK-NEXT: ld r29, -24(r1) # 8-byte Folded Reload
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; CHECK-NEXT: ld r28, -32(r1) # 8-byte Folded Reload
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; CHECK-NEXT: blr
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entry:
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%cmp7 = icmp sgt i32 %Len, 0
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%cmp1 = icmp sgt i32 %Arg, 10
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%or.cond = and i1 %cmp7, %cmp1
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br i1 %or.cond, label %for.body.us, label %for.cond.cleanup
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for.body.us: ; preds = %entry, %for.body.us
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%i.08.us = phi i32 [ %inc.us, %for.body.us ], [ 0, %entry ]
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tail call void %fp(i32 signext %Arg) #1
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%inc.us = add nuw nsw i32 %i.08.us, 1
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%exitcond = icmp eq i32 %inc.us, %Len
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br i1 %exitcond, label %for.cond.cleanup, label %for.body.us
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for.cond.cleanup: ; preds = %for.body.us, %entry
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tail call void %fp(i32 signext %Arg) #1
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ret void
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}
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