Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/CodeGen/ARM/dagcombine-anyexttozeroext.ll

@@ -0,0 +1,66 @@
+; RUN: llc -mtriple armv7 %s -o - | FileCheck %s
+
+; CHECK-LABEL: f:
+define float @f(<4 x i16>* nocapture %in) {
+  ; CHECK: vld1
+  ; CHECK: vmovl.u16
+  ; CHECK-NOT: vand
+  %1 = load <4 x i16>, <4 x i16>* %in
+  ; CHECK: vcvt.f32.u32
+  %2 = uitofp <4 x i16> %1 to <4 x float>
+  %3 = extractelement <4 x float> %2, i32 0
+  %4 = extractelement <4 x float> %2, i32 1
+  %5 = extractelement <4 x float> %2, i32 2
+
+  ; CHECK: vadd.f32
+  %6 = fadd float %3, %4
+  %7 = fadd float %6, %5
+
+  ret float %7
+}
+
+; CHECK-LABEL: g:
+define float @g(<4 x i16>* nocapture %in) {
+  ; CHECK: vldr
+  %1 = load <4 x i16>, <4 x i16>* %in
+
+  ; For now we're generating a vmov.16 and a uxth instruction.
+  ; The uxth is redundant, and we should be able to extend without
+  ; having to generate cross-domain copies. Once we can do this
+  ; we should modify the checks below.
+
+  ; CHECK: uxth
+  %2 = extractelement <4 x i16> %1, i32 0
+  ; CHECK: vcvt.f32.u32
+  %3 = uitofp i16 %2 to float
+  ret float %3
+}
+
+; The backend generates for the following code an
+; (and 0xff (i32 extract_vector_elt (zext load <4 x i8> to 4 x i16)))
+;
+; The and is not redundant and cannot be removed. Since
+; extract_vector_elt is doing an implicit any_ext, the and
+; is required to guarantee that the top bits are set to zero.
+
+; Ideally should be a zext from <4 x i8> to <4 x 32>.
+
+; CHECK-LABEL: h:
+; CHECK: vld1.32
+; CHECK: uxtb
+define <4 x i32> @h(<4 x i8> *%in) {
+  %1 = load <4 x i8>, <4 x i8>* %in, align 4
+  %2 = extractelement <4 x i8> %1, i32 0
+  %3 = zext i8 %2 to i32
+  %4 = insertelement <4 x i32> undef, i32 %3, i32 0
+  %5 = extractelement <4 x i8> %1, i32 1
+  %6 = zext i8 %5 to i32
+  %7 = insertelement <4 x i32> %4, i32 %6, i32 1
+  %8 = extractelement <4 x i8> %1, i32 2
+  %9 = zext i8 %8 to i32
+  %10 = insertelement <4 x i32> %7, i32 %9, i32 2
+  %11 = extractelement <4 x i8> %1, i32 3
+  %12 = zext i8 %11 to i32
+  %13 = insertelement <4 x i32> %10, i32 %12, i32 3
+  ret <4 x i32> %13
+}