Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/CodeGen/X86/change-compare-stride-trickiness-1.ll

@@ -0,0 +1,31 @@
+; RUN: llc -mtriple=i686-- < %s | FileCheck %s
+
+; The comparison happens after the relevant use, so the stride can easily
+; be changed. The comparison can be done in a narrower mode than the
+; induction variable.
+; TODO: By making the first store post-increment as well, the loop setup
+; could be made simpler.
+
+define void @foo() nounwind {
+; CHECK-LABEL: foo:
+; CHECK-NOT: ret
+; CHECK: cmpl $10
+; CHECK: ret
+
+entry:
+	br label %loop
+
+loop:
+	%indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ]		; <i32> [#uses=1]
+	%i.2.0.us1534 = add i32 %indvar, 1		; <i32> [#uses=3]
+	%tmp628.us1540 = shl i32 %i.2.0.us1534, 1		; <i32> [#uses=1]
+	%tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64		; <i64> [#uses=1]
+	store i64 %tmp645646647.us1547, i64* null
+	%tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4		; <i1> [#uses=2]
+	%tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0		; <i32> [#uses=1]
+	store i32 %tmp623.us1538, i32* null
+	br i1 %tmp611.us1535, label %exit, label %loop
+
+exit:
+	ret void
+}