[CodeGen] Fix warning in getNode for EXTRACT_SUBVECTOR

Fix a warning in getNode() when extracting a subvector from a
concat vector. We can simply replace the call to getVectorNumElements
with getVectorMinNumElements as this follows the defined behaviour
for EXTRACT_SUBVECTOR.

Differential Revision: https://reviews.llvm.org/D82746

Author: david-arm

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_get2.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_get3.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_get4.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_st2.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_st3.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_st4.c

@@ -1,6 +1,11 @@
+// REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
 
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
 #include <arm_sve.h>
 
 #ifdef SVE_OVERLOADED_FORMS

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -5566,7 +5566,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT,
     // the concat have the same type as the extract.
     if (N2C && N1.getOpcode() == ISD::CONCAT_VECTORS &&
         N1.getNumOperands() > 0 && VT == N1.getOperand(0).getValueType()) {
-      unsigned Factor = VT.getVectorNumElements();
+      unsigned Factor = VT.getVectorMinNumElements();
       return N1.getOperand(N2C->getZExtValue() / Factor);
     }