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[PowerPC][NFC] Update test to prevent DCE from causing failures

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The test case provided in PR45709 can be simplified by DCE to an
empty function. To prevent this from happening if DCE is run prior
to ISEL in the back end, just add optnone to the function. The
behaviour it is testing for is in the SDAG legalization and is
not sensitive to optnone so the test case still achieves its desired
objective.
This commit is contained in:
Nemanja Ivanovic 2020-05-26 13:34:52 -05:00
parent e9791adae5
commit 3e2b8f42e3
1 changed files with 17 additions and 10 deletions
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27
test/CodeGen/PowerPC/pr45709.ll
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@ -10,30 +10,37 @@
define dso_local void @_ZN1a1bEv(<4 x float> %in) local_unnamed_addr #0 align 2 {
; CHECK-LABEL: _ZN1a1bEv:
; CHECK: # %bb.0:
; CHECK-NEXT: bclr 12, 4*cr5+lt, 0
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: bc 12, 4*cr5+lt, .LBB0_6
; CHECK-NEXT: b .LBB0_1
; CHECK-NEXT: .LBB0_1: # %.preheader
; CHECK-NEXT: b .LBB0_2
; CHECK-NEXT: .LBB0_2:
; CHECK-NEXT: b .LBB0_3
; CHECK-NEXT: .LBB0_3:
; CHECK-NEXT: addis r3, r2, .LCPI0_0@toc@ha
; CHECK-NEXT: vxor v3, v3, v3
; CHECK-NEXT: addi r3, r3, .LCPI0_0@toc@l
; CHECK-NEXT: lvx v4, 0, r3
; CHECK-NEXT: lvx v3, 0, r3
; CHECK-NEXT: vperm v2, v2, v2, v3
; CHECK-NEXT: vxor v3, v3, v3
; CHECK-NEXT: addi r3, r1, -48
; CHECK-NEXT: stvx v3, 0, r3
; CHECK-NEXT: addi r3, r1, -32
; CHECK-NEXT: vperm v2, v2, v2, v4
; CHECK-NEXT: stvx v2, 0, r3
; CHECK-NEXT: lwz r3, -48(r1)
; CHECK-NEXT: lwz r4, -32(r1)
; CHECK-NEXT: cmpw r4, r3
; CHECK-NEXT: bc 12, gt, .LBB0_2
; CHECK-NEXT: b .LBB0_3
; CHECK-NEXT: .LBB0_2: # %.preheader
; CHECK-NEXT: bc 12, gt, .LBB0_4
; CHECK-NEXT: b .LBB0_5
; CHECK-NEXT: .LBB0_4:
; CHECK-NEXT: addi r3, r4, 0
; CHECK-NEXT: .LBB0_3: # %.preheader
; CHECK-NEXT: .LBB0_5:
; CHECK-NEXT: cmpw r3, r3
; CHECK-NEXT: stw r3, -64(r1)
; CHECK-NEXT: addi r3, r1, -64
; CHECK-NEXT: lvx v2, 0, r3
; CHECK-NEXT: addi r3, r1, -16
; CHECK-NEXT: stvx v2, 0, r3
; CHECK-NEXT: .LBB0_6:
; CHECK-NEXT: blr
br i1 undef, label %7, label %1
@ -55,4 +62,4 @@ define dso_local void @_ZN1a1bEv(<4 x float> %in) local_unnamed_addr #0 align 2
declare <4 x float> @llvm.maxnum.v4f32(<4 x float>, <4 x float>) #0
attributes #0 = { nounwind }
attributes #0 = { nounwind optnone noinline }