[System] Precommit of test for #112491

llvm/test/Transforms/SLPVectorizer/SystemZ/vec-elt-insertion.ll

@@ -0,0 +1,128 @@
+; RUN: opt < %s -mtriple=s390x-unknown-linux -mcpu=z16 -S -passes=slp-vectorizer \
+; RUN:   -pass-remarks-output=%t | FileCheck %s
+; RUN: cat %t | FileCheck -check-prefix=REMARK %s
+;
+; NB! This is a pre-commit version (for #112491) with current codegen and remarks.
+;
+; Test functions that (at least currently) only gets vectorized if the
+; insertion cost for an element load is counted as free.
+
+; This function needs the free element load to be recognized in SLP
+; getGatherCost().
+define void @fun0(ptr nocapture %0, double %1) {
+; CHECK-LABEL: define void @fun0(
+; CHECK:         fmul double
+; CHECK:         call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.sqrt.f64(
+; CHECK:         fmul double
+; CHECK:         call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.sqrt.f64(
+;
+; REMARK-LABEL: Function: fun0
+; REMARK: Args:
+; REMARK-NEXT: - String:          'List vectorization was possible but not beneficial with cost '
+; REMARK-NEXT: - Cost:            '0'
+
+  %3 = fmul double %1, 2.000000e+00
+  %4 = tail call double @llvm.fmuladd.f64(double %3, double %3, double 0.000000e+00)
+  %5 = tail call double @llvm.fmuladd.f64(double %3, double %3, double %4)
+  %sqrt1 = tail call double @llvm.sqrt.f64(double %5)
+  %6 = load double, ptr %0, align 8
+  %7 = fmul double %6, 2.000000e+00
+  %8 = tail call double @llvm.fmuladd.f64(double %7, double %7, double 0.000000e+00)
+  %9 = tail call double @llvm.fmuladd.f64(double %7, double %7, double %8)
+  %sqrt = tail call double @llvm.sqrt.f64(double %9)
+  %10 = fadd double %sqrt1, %sqrt
+  store double %10, ptr %0, align 8
+  ret void
+}
+
+; This function needs the element-load to be recognized in SystemZ
+; getVectorInstrCost().
+define void @fun1(double %0) {
+; CHECK-LABEL: define void @fun1(
+; CHECK:         phi double
+; CHECK-NEXT:    phi double
+; CHECK-NEXT:    phi double
+; CHECK-NEXT:    phi double
+; CHECK-NEXT:    phi double
+; CHECK-NEXT:    phi double
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    fmul double
+; CHECK-NEXT:    fmul double
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    fsub double
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK-NEXT:    call double @llvm.fmuladd.f64(
+; CHECK:         fcmp olt double
+; CHECK-NEXT:    fcmp olt double
+; CHECK-NEXT:    or i1
+;
+; REMARK-LABEL: Function: fun1
+; REMARK: Args:
+; REMARK:      - String:          'List vectorization was possible but not beneficial with cost '
+; REMARK-NEXT: - Cost:            '0'
+
+  br label %2
+
+2:
+  %3 = phi double [ poison, %1 ], [ poison, %2 ]
+  %4 = phi double [ undef, %1 ], [ poison, %2 ]
+  %5 = phi double [ 0.000000e+00, %1 ], [ poison, %2 ]
+  %6 = phi double [ 0.000000e+00, %1 ], [ poison, %2 ]
+  %7 = phi double [ 0.000000e+00, %1 ], [ poison, %2 ]
+  %8 = phi double [ 0.000000e+00, %1 ], [ %21, %2 ]
+  %9 = fsub double 0.000000e+00, %8
+  %10 = fsub double 0.000000e+00, %7
+  %11 = fmul double %9, 0.000000e+00
+  %12 = fmul double %10, 0.000000e+00
+  %13 = fsub double 0.000000e+00, %6
+  %14 = fsub double 0.000000e+00, %5
+  %15 = tail call double @llvm.fmuladd.f64(double %13, double %13, double %11)
+  %16 = tail call double @llvm.fmuladd.f64(double %14, double %14, double %12)
+  %17 = fsub double 0.000000e+00, %4
+  %18 = fsub double 0.000000e+00, %3
+  %19 = tail call double @llvm.fmuladd.f64(double %17, double %17, double %15)
+  %20 = tail call double @llvm.fmuladd.f64(double %18, double %18, double %16)
+  %21 = load double, ptr null, align 8
+  %22 = fcmp olt double %19, %0
+  %23 = fcmp olt double %20, 0.000000e+00
+  %24 = or i1 %23, %22
+  br label %2
+}
+
+declare double @llvm.fmuladd.f64(double, double, double)
+
+; This should *not* be vectorized as the insertion into the vector isn't free,
+; which is recognized in SystemZTTImpl::getScalarizationOverhead().
+define void @fun2(ptr %0, ptr %Dst) {
+; CHECK-LABEL: define void @fun2(
+; CHECK: insertelement
+; CHECK: store <2 x i64>
+;
+; REMARK-LABEL: Function: fun2
+; REMARK: Args:
+; REMARK-NEXT: - String:          'Stores SLP vectorized with cost '
+; REMARK-NEXT: - Cost:            '-1'
+
+  %3 = load i64, ptr %0, align 8
+  %4 = icmp eq i64 %3, 0
+  br i1 %4, label %5, label %6
+
+5:
+  ret void
+
+6:
+  %7 = getelementptr i8, ptr %Dst, i64 24
+  store i64 %3, ptr %7, align 8
+  %8 = getelementptr i8, ptr %Dst, i64 16
+  store i64 0, ptr %8, align 8
+  br label %5
+}