Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/Transforms/StraightLineStrengthReduce/X86/lit.local.cfg

@@ -0,0 +1,2 @@
+if not 'X86' in config.root.targets:
+    config.unsupported = True

external/llvm/test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll

@@ -0,0 +1,44 @@
+; RUN: opt < %s -slsr -gvn -S | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Do not perform SLSR on &input[s] and &input[s * 2] which fit into addressing
+; modes of X86.
+define i32 @no_slsr_gep(i32* %input, i64 %s) {
+; CHECK-LABEL: @no_slsr_gep(
+  ; v0 = input[0];
+  %p0 = getelementptr inbounds i32, i32* %input, i64 0
+  %v0 = load i32, i32* %p0
+
+  ; v1 = input[s];
+  %p1 = getelementptr inbounds i32, i32* %input, i64 %s
+; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %s
+  %v1 = load i32, i32* %p1
+
+  ; v2 = input[s * 2];
+  %s2 = mul nsw i64 %s, 2
+  %p2 = getelementptr inbounds i32, i32* %input, i64 %s2
+; CHECK: %p2 = getelementptr inbounds i32, i32* %input, i64 %s2
+  %v2 = load i32, i32* %p2
+
+  ; return v0 + v1 + v2;
+  %1 = add i32 %v0, %v1
+  %2 = add i32 %1, %v2
+  ret i32 %2
+}
+
+define void @no_slsr_add(i32 %b, i32 %s) {
+; CHECK-LABEL: @no_slsr_add(
+  %1 = add i32 %b, %s
+; CHECK: add i32 %b, %s
+  call void @foo(i32 %1)
+  %s2 = mul i32 %s, 2
+; CHECK: %s2 = mul i32 %s, 2
+  %2 = add i32 %b, %s2
+; CHECK: add i32 %b, %s2
+  call void @foo(i32 %2)
+  ret void
+}
+
+declare void @foo(i32 %a)