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[DAGCombine] Support splat_vector nodes in (and (extload)) dagcombine
Differential Revision: https://reviews.llvm.org/D125367
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38
llvm/test/CodeGen/AArch64/sve-fold-loadext-and-splat-vector.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py | ||
; RUN: llc < %s | FileCheck %s | ||
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target triple = "aarch64-unknown-linux-gnu" | ||
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; Ensure that a no-op 'and' after an extending load gets removed when the and is | ||
; constructed via a splat_vector node. | ||
define <vscale x 2 x i64> @fold_loadext_and(ptr %ptr, i32 %needle, <vscale x 2 x i64> %b) #0 { | ||
; CHECK-LABEL: fold_loadext_and: | ||
; CHECK: // %bb.0: | ||
; CHECK-NEXT: ptrue p0.d | ||
; CHECK-NEXT: ld1w { z0.d }, p0/z, [x0] | ||
; CHECK-NEXT: ret | ||
%load = load <vscale x 2 x i32>, ptr %ptr, align 4 | ||
%ext = zext <vscale x 2 x i32> %load to <vscale x 2 x i64> | ||
%splatinsert = insertelement <vscale x 2 x i64> poison, i64 4294967295, i64 0 | ||
%splat = shufflevector <vscale x 2 x i64> %splatinsert, <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer | ||
%and = and <vscale x 2 x i64> %ext, %splat | ||
ret <vscale x 2 x i64> %and | ||
} | ||
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; Same as above but testing the case we care about. Here the vscale x 2 x i32 | ||
; types get legalized into vscale x 2 x i64 types which introduces the extending | ||
; load and 'and' nodes similar to the above case. | ||
define <vscale x 2 x i1> @fold_loadext_and_legalize(ptr %ptr, <vscale x 2 x i32> %a) #0 { | ||
; CHECK-LABEL: fold_loadext_and_legalize: | ||
; CHECK: // %bb.0: | ||
; CHECK-NEXT: ptrue p0.d | ||
; CHECK-NEXT: and z0.d, z0.d, #0xffffffff | ||
; CHECK-NEXT: ld1w { z1.d }, p0/z, [x0] | ||
; CHECK-NEXT: cmpeq p0.d, p0/z, z1.d, z0.d | ||
; CHECK-NEXT: ret | ||
%load = load <vscale x 2 x i32>, ptr %ptr | ||
%cmp = icmp eq <vscale x 2 x i32> %load, %a | ||
ret <vscale x 2 x i1> %cmp | ||
} | ||
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attributes #0 = { "target-features"="+sve" } |