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llvm-mirror/test/CodeGen/PowerPC/pr45186.ll
QingShan Zhang 4c07a9f4d6 [PowerPC] Select the D-Form load if we know its offset meets the requirement 
The LD/STD likewise instruction are selected only when the alignment in
the load/store >= 4 to deal with the case that the offset might not be
known(i.e. relocations). That means we have to select the X-Form load
for %0 = load i64, i64* %arrayidx, align 2 In fact, we can still select
the D-Form load if the offset is known. So, we only query the load/store
alignment when we don't know if the offset is a multiple of 4.

Reviewed By: jji, Nemanjai

Differential Revision: https://reviews.llvm.org/D93099
2020-12-18 07:27:26 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -ppc-asm-full-reg-names -mtriple=powerpc64-- -mattr=+vsx \
; RUN: -verify-machineinstrs < %s | FileCheck %s
%struct.anon = type { i64, i64 }
@d = local_unnamed_addr global %struct.anon zeroinitializer, align 8
; Function Attrs: norecurse nounwind readonly
define i64 @e(i8* nocapture readonly %f) local_unnamed_addr #0 {
; CHECK-LABEL: e:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: ld r3, 0(r3)
; CHECK-NEXT: blr
entry:
%0 = load i8, i8* %f, align 1
%conv = zext i8 %0 to i64
%shl = shl nuw i64 %conv, 56
%arrayidx1 = getelementptr inbounds i8, i8* %f, i64 1
%1 = load i8, i8* %arrayidx1, align 1
%conv2 = zext i8 %1 to i64
%shl3 = shl nuw nsw i64 %conv2, 48
%or = or i64 %shl3, %shl
%arrayidx4 = getelementptr inbounds i8, i8* %f, i64 2
%2 = load i8, i8* %arrayidx4, align 1
%conv5 = zext i8 %2 to i64
%shl6 = shl nuw nsw i64 %conv5, 40
%or7 = or i64 %or, %shl6
%arrayidx8 = getelementptr inbounds i8, i8* %f, i64 3
%3 = load i8, i8* %arrayidx8, align 1
%conv9 = zext i8 %3 to i64
%shl10 = shl nuw nsw i64 %conv9, 32
%or11 = or i64 %or7, %shl10
%arrayidx12 = getelementptr inbounds i8, i8* %f, i64 4
%4 = load i8, i8* %arrayidx12, align 1
%conv13 = zext i8 %4 to i64
%shl14 = shl nuw nsw i64 %conv13, 24
%or15 = or i64 %or11, %shl14
%arrayidx16 = getelementptr inbounds i8, i8* %f, i64 5
%5 = load i8, i8* %arrayidx16, align 1
%conv17 = zext i8 %5 to i64
%shl18 = shl nuw nsw i64 %conv17, 16
%or20 = or i64 %or15, %shl18
%arrayidx21 = getelementptr inbounds i8, i8* %f, i64 6
%6 = load i8, i8* %arrayidx21, align 1
%conv22 = zext i8 %6 to i64
%shl23 = shl nuw nsw i64 %conv22, 8
%or25 = or i64 %or20, %shl23
%arrayidx26 = getelementptr inbounds i8, i8* %f, i64 7
%7 = load i8, i8* %arrayidx26, align 1
%conv27 = zext i8 %7 to i64
%or28 = or i64 %or25, %conv27
ret i64 %or28
}
; Function Attrs: nofree norecurse nounwind
define void @g() local_unnamed_addr #0 {
; CHECK-LABEL: g:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addis r3, r2, .LC0@toc@ha
; CHECK-NEXT: addis r4, r2, .LC1@toc@ha
; CHECK-NEXT: ld r3, .LC0@toc@l(r3)
; CHECK-NEXT: ld r4, .LC1@toc@l(r4)
; CHECK-NEXT: lxvd2x vs0, 0, r3
; CHECK-NEXT: stxvd2x vs0, 0, r4
; CHECK-NEXT: blr
entry:
%0 = load i8, i8* getelementptr inbounds (i8, i8* bitcast (void ()* @g to i8*), i64 8), align 1
%conv.i = zext i8 %0 to i64
%shl.i = shl nuw i64 %conv.i, 56
%1 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 9), align 1
%conv2.i = zext i8 %1 to i64
%shl3.i = shl nuw nsw i64 %conv2.i, 48
%or.i = or i64 %shl3.i, %shl.i
%2 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 10), align 1
%conv5.i = zext i8 %2 to i64
%shl6.i = shl nuw nsw i64 %conv5.i, 40
%or7.i = or i64 %or.i, %shl6.i
%3 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 11), align 1
%conv9.i = zext i8 %3 to i64
%shl10.i = shl nuw nsw i64 %conv9.i, 32
%or11.i = or i64 %or7.i, %shl10.i
%4 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 12), align 1
%conv13.i = zext i8 %4 to i64
%shl14.i = shl nuw nsw i64 %conv13.i, 24
%or15.i = or i64 %or11.i, %shl14.i
%5 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 13), align 1
%conv17.i = zext i8 %5 to i64
%shl18.i = shl nuw nsw i64 %conv17.i, 16
%or20.i = or i64 %or15.i, %shl18.i
%6 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 14), align 1
%conv22.i = zext i8 %6 to i64
%shl23.i = shl nuw nsw i64 %conv22.i, 8
%or25.i = or i64 %or20.i, %shl23.i
%7 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 15), align 1
%conv27.i = zext i8 %7 to i64
%or28.i = or i64 %or25.i, %conv27.i
store i64 %or28.i, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i64 0, i32 1), align 8
%8 = load i8, i8* bitcast (void ()* @g to i8*), align 1
%conv.i2 = zext i8 %8 to i64
%shl.i3 = shl nuw i64 %conv.i2, 56
%9 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 1), align 1
%conv2.i4 = zext i8 %9 to i64
%shl3.i5 = shl nuw nsw i64 %conv2.i4, 48
%or.i6 = or i64 %shl3.i5, %shl.i3
%10 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 2), align 1
%conv5.i7 = zext i8 %10 to i64
%shl6.i8 = shl nuw nsw i64 %conv5.i7, 40
%or7.i9 = or i64 %or.i6, %shl6.i8
%11 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 3), align 1
%conv9.i10 = zext i8 %11 to i64
%shl10.i11 = shl nuw nsw i64 %conv9.i10, 32
%or11.i12 = or i64 %or7.i9, %shl10.i11
%12 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 4), align 1
%conv13.i13 = zext i8 %12 to i64
%shl14.i14 = shl nuw nsw i64 %conv13.i13, 24
%or15.i15 = or i64 %or11.i12, %shl14.i14
%13 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 5), align 1
%conv17.i16 = zext i8 %13 to i64
%shl18.i17 = shl nuw nsw i64 %conv17.i16, 16
%or20.i18 = or i64 %or15.i15, %shl18.i17
%14 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 6), align 1
%conv22.i19 = zext i8 %14 to i64
%shl23.i20 = shl nuw nsw i64 %conv22.i19, 8
%or25.i21 = or i64 %or20.i18, %shl23.i20
%15 = load i8, i8* getelementptr (i8, i8* bitcast (void ()* @g to i8*), i64 7), align 1
%conv27.i22 = zext i8 %15 to i64
%or28.i23 = or i64 %or25.i21, %conv27.i22
store i64 %or28.i23, i64* getelementptr inbounds (%struct.anon, %struct.anon* @d, i64 0, i32 0), align 8
ret void
}
attributes #0 = { nounwind }
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