1492c88f49
This patch fixes the following two bugs in `PPCInstrInfo::isSignOrZeroExtended` helper, which is used from sign-/zero-extension elimination in PPCMIPeephole pass. - Registers defined by load with update (e.g. LBZU) were identified as already sign or zero-extended. But it is true only for the first def (loaded value) and not for the second def (i.e. updated pointer). - Registers defined by ORIS/XORIS were identified as already sign-extended. But, it is not true for sign extension depending on the immediate (while it is ok for zero extension). To handle the first case, the parameter for the helpers is changed from `MachineInstr` to a register number to distinguish first and second defs. Also, this patch moves the initialization of PPCMIPeepholePass to allow mir test case. Reviewed By: nemanjai Differential Revision: https://reviews.llvm.org/D40554
68 lines
2.4 KiB
LLVM
68 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc -mcpu=pwr8 -ppc-asm-full-reg-names \
|
|
; RUN: -mtriple=powerpc64le-unknown-unknown < %s | FileCheck %s
|
|
define dso_local void @test(void (i32)* nocapture %fp, i32 signext %Arg, i32 signext %Len) local_unnamed_addr #0 {
|
|
; CHECK-LABEL: test:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: mflr r0
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 64
|
|
; CHECK-NEXT: .cfi_offset lr, 16
|
|
; CHECK-NEXT: .cfi_offset r28, -32
|
|
; CHECK-NEXT: .cfi_offset r29, -24
|
|
; CHECK-NEXT: .cfi_offset r30, -16
|
|
; CHECK-NEXT: std r28, -32(r1) # 8-byte Folded Spill
|
|
; CHECK-NEXT: std r29, -24(r1) # 8-byte Folded Spill
|
|
; CHECK-NEXT: std r30, -16(r1) # 8-byte Folded Spill
|
|
; CHECK-NEXT: std r0, 16(r1)
|
|
; CHECK-NEXT: stdu r1, -64(r1)
|
|
; CHECK-NEXT: mr r29, r5
|
|
; CHECK-NEXT: mr r30, r4
|
|
; CHECK-NEXT: mr r28, r3
|
|
; CHECK-NEXT: std r2, 24(r1)
|
|
; CHECK-NEXT: cmpwi r29, 1
|
|
; CHECK-NEXT: bc 12, lt, .LBB0_3
|
|
; CHECK-NEXT: # %bb.1: # %entry
|
|
; CHECK-NEXT: cmpwi r30, 11
|
|
; CHECK-NEXT: bc 12, lt, .LBB0_3
|
|
; CHECK-NEXT: .p2align 5
|
|
; CHECK-NEXT: .LBB0_2: # %for.body.us
|
|
; CHECK-NEXT: #
|
|
; CHECK-NEXT: mtctr r28
|
|
; CHECK-NEXT: mr r3, r30
|
|
; CHECK-NEXT: mr r12, r28
|
|
; CHECK-NEXT: bctrl
|
|
; CHECK-NEXT: ld 2, 24(r1)
|
|
; CHECK-NEXT: addi r29, r29, -1
|
|
; CHECK-NEXT: cmplwi r29, 0
|
|
; CHECK-NEXT: bne cr0, .LBB0_2
|
|
; CHECK-NEXT: .LBB0_3: # %for.cond.cleanup
|
|
; CHECK-NEXT: mtctr r28
|
|
; CHECK-NEXT: mr r3, r30
|
|
; CHECK-NEXT: mr r12, r28
|
|
; CHECK-NEXT: bctrl
|
|
; CHECK-NEXT: ld 2, 24(r1)
|
|
; CHECK-NEXT: addi r1, r1, 64
|
|
; CHECK-NEXT: ld r0, 16(r1)
|
|
; CHECK-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
|
|
; CHECK-NEXT: ld r29, -24(r1) # 8-byte Folded Reload
|
|
; CHECK-NEXT: ld r28, -32(r1) # 8-byte Folded Reload
|
|
; CHECK-NEXT: mtlr r0
|
|
; CHECK-NEXT: blr
|
|
entry:
|
|
%cmp7 = icmp sgt i32 %Len, 0
|
|
%cmp1 = icmp sgt i32 %Arg, 10
|
|
%or.cond = and i1 %cmp7, %cmp1
|
|
br i1 %or.cond, label %for.body.us, label %for.cond.cleanup
|
|
|
|
for.body.us: ; preds = %entry, %for.body.us
|
|
%i.08.us = phi i32 [ %inc.us, %for.body.us ], [ 0, %entry ]
|
|
tail call void %fp(i32 signext %Arg) #1
|
|
%inc.us = add nuw nsw i32 %i.08.us, 1
|
|
%exitcond = icmp eq i32 %inc.us, %Len
|
|
br i1 %exitcond, label %for.cond.cleanup, label %for.body.us
|
|
|
|
for.cond.cleanup: ; preds = %for.body.us, %entry
|
|
tail call void %fp(i32 signext %Arg) #1
|
|
ret void
|
|
}
|