Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/CodeGen/Hexagon/cext-check.ll

@@ -0,0 +1,57 @@
+; RUN: llc -march=hexagon -hexagon-eif=0 -ifcvt-limit=0 < %s | FileCheck %s
+; Check that we constant extended instructions only when necessary.
+
+define i32 @cext_test1(i32* %a) nounwind {
+; CHECK: r{{[0-9]+}}{{ *}}={{ *}}memw(r{{[0-9]+}}{{ *}}+{{ *}}##8000)
+; CHECK: r{{[0-9]+}}{{ *}}={{ *}}add(r{{[0-9]+}}{{ *}},{{ *}}##300000)
+; CHECK-NOT: r{{[0-9]+}}{{ *}}={{ *}}memw(r{{[0-9]+}}{{ *}}+{{ *}}##4092)
+; CHECK-NOT: r{{[0-9]+}}{{ *}}={{ *}}add(r{{[0-9]+}}{{ *}},{{ *}}##300)
+entry:
+  %0 = load i32, i32* %a, align 4
+  %tobool = icmp ne i32 %0, 0
+  br i1 %tobool, label %if.then, label %if.end
+
+if.then:
+  %arrayidx1 = getelementptr inbounds i32, i32* %a, i32 2000
+  %1 = load i32, i32* %arrayidx1, align 4
+  %add = add nsw i32 %1, 300000
+  br label %return
+
+if.end:
+  %arrayidx2 = getelementptr inbounds i32, i32* %a, i32 1023
+  %2 = load i32, i32* %arrayidx2, align 4
+  %add3 = add nsw i32 %2, 300
+  br label %return
+
+return:
+  %retval.0 = phi i32 [ %add, %if.then ], [ %add3, %if.end ]
+  ret i32 %retval.0
+}
+
+define i32 @cext_test2(i8* %a) nounwind {
+; CHECK-NOT: r{{[0-9]+}}{{ *}}={{ *}}memub(r{{[0-9]+}}+{{ *}}##1023)
+; CHECK: r{{[0-9]+}}{{ *}}={{ *}}add(r{{[0-9]+}}{{ *}},{{ *}}##300000)
+; CHECK: r{{[0-9]+}}{{ *}}={{ *}}memub(r{{[0-9]+}}{{ *}}+{{ *}}##1024)
+; CHECK-NOT: r{{[0-9]+}}{{ *}}={{ *}}add(r{{[0-9]+}}{{ *}},{{ *}}##6000)
+entry:
+  %tobool = icmp ne i8* %a, null
+  br i1 %tobool, label %if.then, label %if.end
+
+if.then:
+  %arrayidx = getelementptr inbounds i8, i8* %a, i32 1023
+  %0 = load i8, i8* %arrayidx, align 1
+  %conv = zext i8 %0 to i32
+  %add = add nsw i32 %conv, 300000
+  br label %return
+
+if.end:
+  %arrayidx1 = getelementptr inbounds i8, i8* %a, i32 1024
+  %1 = load i8, i8* %arrayidx1, align 1
+  %conv2 = zext i8 %1 to i32
+  %add3 = add nsw i32 %conv2, 6000
+  br label %return
+
+return:
+  %retval.0 = phi i32 [ %add, %if.then ], [ %add3, %if.end ]
+  ret i32 %retval.0
+}