[SLP] add test with prefer-vector-width function attribute; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374039 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/SLPVectorizer/X86/pr19657.ll

@@ -1,40 +1,40 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -basicaa -slp-vectorizer -S -mcpu=corei7-avx | FileCheck %s
-; RUN: opt < %s -basicaa -slp-vectorizer -slp-max-reg-size=128 -S -mcpu=corei7-avx | FileCheck %s --check-prefix=V128
+; RUN: opt < %s -basicaa -slp-vectorizer -S -mcpu=corei7-avx | FileCheck %s --check-prefixes=ANY,AVX
+; RUN: opt < %s -basicaa -slp-vectorizer -slp-max-reg-size=128 -S -mcpu=corei7-avx | FileCheck %s --check-prefixes=ANY,MAX128
 
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-define void @foo(double* %x) {
-; CHECK-LABEL: @foo(
-; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, double* [[X:%.*]], i64 1
-; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds double, double* [[X]], i64 2
-; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds double, double* [[X]], i64 3
-; CHECK-NEXT:    [[TMP4:%.*]] = bitcast double* [[X]] to <4 x double>*
-; CHECK-NEXT:    [[TMP5:%.*]] = load <4 x double>, <4 x double>* [[TMP4]], align 8
-; CHECK-NEXT:    [[TMP6:%.*]] = fadd <4 x double> [[TMP5]], [[TMP5]]
-; CHECK-NEXT:    [[TMP7:%.*]] = fadd <4 x double> [[TMP6]], [[TMP5]]
-; CHECK-NEXT:    [[TMP8:%.*]] = bitcast double* [[X]] to <4 x double>*
-; CHECK-NEXT:    store <4 x double> [[TMP7]], <4 x double>* [[TMP8]], align 8
-; CHECK-NEXT:    ret void
+define void @store_chains(double* %x) {
+; AVX-LABEL: @store_chains(
+; AVX-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, double* [[X:%.*]], i64 1
+; AVX-NEXT:    [[TMP2:%.*]] = getelementptr inbounds double, double* [[X]], i64 2
+; AVX-NEXT:    [[TMP3:%.*]] = getelementptr inbounds double, double* [[X]], i64 3
+; AVX-NEXT:    [[TMP4:%.*]] = bitcast double* [[X]] to <4 x double>*
+; AVX-NEXT:    [[TMP5:%.*]] = load <4 x double>, <4 x double>* [[TMP4]], align 8
+; AVX-NEXT:    [[TMP6:%.*]] = fadd <4 x double> [[TMP5]], [[TMP5]]
+; AVX-NEXT:    [[TMP7:%.*]] = fadd <4 x double> [[TMP6]], [[TMP5]]
+; AVX-NEXT:    [[TMP8:%.*]] = bitcast double* [[X]] to <4 x double>*
+; AVX-NEXT:    store <4 x double> [[TMP7]], <4 x double>* [[TMP8]], align 8
+; AVX-NEXT:    ret void
 ;
-; V128-LABEL: @foo(
-; V128-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, double* [[X:%.*]], i64 1
-; V128-NEXT:    [[TMP2:%.*]] = bitcast double* [[X]] to <2 x double>*
-; V128-NEXT:    [[TMP3:%.*]] = load <2 x double>, <2 x double>* [[TMP2]], align 8
-; V128-NEXT:    [[TMP4:%.*]] = fadd <2 x double> [[TMP3]], [[TMP3]]
-; V128-NEXT:    [[TMP5:%.*]] = fadd <2 x double> [[TMP4]], [[TMP3]]
-; V128-NEXT:    [[TMP6:%.*]] = bitcast double* [[X]] to <2 x double>*
-; V128-NEXT:    store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 8
-; V128-NEXT:    [[TMP7:%.*]] = getelementptr inbounds double, double* [[X]], i64 2
-; V128-NEXT:    [[TMP8:%.*]] = getelementptr inbounds double, double* [[X]], i64 3
-; V128-NEXT:    [[TMP9:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
-; V128-NEXT:    [[TMP10:%.*]] = load <2 x double>, <2 x double>* [[TMP9]], align 8
-; V128-NEXT:    [[TMP11:%.*]] = fadd <2 x double> [[TMP10]], [[TMP10]]
-; V128-NEXT:    [[TMP12:%.*]] = fadd <2 x double> [[TMP11]], [[TMP10]]
-; V128-NEXT:    [[TMP13:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
-; V128-NEXT:    store <2 x double> [[TMP12]], <2 x double>* [[TMP13]], align 8
-; V128-NEXT:    ret void
+; MAX128-LABEL: @store_chains(
+; MAX128-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, double* [[X:%.*]], i64 1
+; MAX128-NEXT:    [[TMP2:%.*]] = bitcast double* [[X]] to <2 x double>*
+; MAX128-NEXT:    [[TMP3:%.*]] = load <2 x double>, <2 x double>* [[TMP2]], align 8
+; MAX128-NEXT:    [[TMP4:%.*]] = fadd <2 x double> [[TMP3]], [[TMP3]]
+; MAX128-NEXT:    [[TMP5:%.*]] = fadd <2 x double> [[TMP4]], [[TMP3]]
+; MAX128-NEXT:    [[TMP6:%.*]] = bitcast double* [[X]] to <2 x double>*
+; MAX128-NEXT:    store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 8
+; MAX128-NEXT:    [[TMP7:%.*]] = getelementptr inbounds double, double* [[X]], i64 2
+; MAX128-NEXT:    [[TMP8:%.*]] = getelementptr inbounds double, double* [[X]], i64 3
+; MAX128-NEXT:    [[TMP9:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
+; MAX128-NEXT:    [[TMP10:%.*]] = load <2 x double>, <2 x double>* [[TMP9]], align 8
+; MAX128-NEXT:    [[TMP11:%.*]] = fadd <2 x double> [[TMP10]], [[TMP10]]
+; MAX128-NEXT:    [[TMP12:%.*]] = fadd <2 x double> [[TMP11]], [[TMP10]]
+; MAX128-NEXT:    [[TMP13:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
+; MAX128-NEXT:    store <2 x double> [[TMP12]], <2 x double>* [[TMP13]], align 8
+; MAX128-NEXT:    ret void
 ;
   %1 = load double, double* %x, align 8
   %2 = fadd double %1, %1
@@ -58,3 +58,45 @@ define void @foo(double* %x) {
   ret void
 }
 
+define void @store_chains_prefer_width_attr(double* %x) #0 {
+; ANY-LABEL: @store_chains_prefer_width_attr(
+; ANY-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, double* [[X:%.*]], i64 1
+; ANY-NEXT:    [[TMP2:%.*]] = bitcast double* [[X]] to <2 x double>*
+; ANY-NEXT:    [[TMP3:%.*]] = load <2 x double>, <2 x double>* [[TMP2]], align 8
+; ANY-NEXT:    [[TMP4:%.*]] = fadd <2 x double> [[TMP3]], [[TMP3]]
+; ANY-NEXT:    [[TMP5:%.*]] = fadd <2 x double> [[TMP4]], [[TMP3]]
+; ANY-NEXT:    [[TMP6:%.*]] = bitcast double* [[X]] to <2 x double>*
+; ANY-NEXT:    store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 8
+; ANY-NEXT:    [[TMP7:%.*]] = getelementptr inbounds double, double* [[X]], i64 2
+; ANY-NEXT:    [[TMP8:%.*]] = getelementptr inbounds double, double* [[X]], i64 3
+; ANY-NEXT:    [[TMP9:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
+; ANY-NEXT:    [[TMP10:%.*]] = load <2 x double>, <2 x double>* [[TMP9]], align 8
+; ANY-NEXT:    [[TMP11:%.*]] = fadd <2 x double> [[TMP10]], [[TMP10]]
+; ANY-NEXT:    [[TMP12:%.*]] = fadd <2 x double> [[TMP11]], [[TMP10]]
+; ANY-NEXT:    [[TMP13:%.*]] = bitcast double* [[TMP7]] to <2 x double>*
+; ANY-NEXT:    store <2 x double> [[TMP12]], <2 x double>* [[TMP13]], align 8
+; ANY-NEXT:    ret void
+;
+  %1 = load double, double* %x, align 8
+  %2 = fadd double %1, %1
+  %3 = fadd double %2, %1
+  store double %3, double* %x, align 8
+  %4 = getelementptr inbounds double, double* %x, i64 1
+  %5 = load double, double* %4, align 8
+  %6 = fadd double %5, %5
+  %7 = fadd double %6, %5
+  store double %7, double* %4, align 8
+  %8 = getelementptr inbounds double, double* %x, i64 2
+  %9 = load double, double* %8, align 8
+  %10 = fadd double %9, %9
+  %11 = fadd double %10, %9
+  store double %11, double* %8, align 8
+  %12 = getelementptr inbounds double, double* %x, i64 3
+  %13 = load double, double* %12, align 8
+  %14 = fadd double %13, %13
+  %15 = fadd double %14, %13
+  store double %15, double* %12, align 8
+  ret void
+}
+
+attributes #0 = { "prefer-vector-width"="128" }