Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/test/Transforms/SCCP/overdefined-div.ll

@@ -0,0 +1,32 @@
+; RUN: opt < %s -sccp -S | FileCheck %s
+
+; Test that SCCP has basic knowledge of when div can nuke overdefined values.
+
+; 0 / X = 0 even if X is overdefined.
+; CHECK-LABEL: test1
+; CHECK-NEXT: ret i32 0
+define i32 @test1(i32 %foo) {
+  %tinkywinky = udiv i32 0, %foo
+  ret i32 %tinkywinky
+}
+
+; CHECK-LABEL: test2
+; CHECK-NEXT: ret i32 0
+define i32 @test2(i32 %foo) {
+  %tinkywinky = sdiv i32 0, %foo
+  ret i32 %tinkywinky
+}
+
+; CHECK-LABEL: test3
+; CHECK: ret i32 %tinkywinky
+define i32 @test3(i32 %foo) {
+  %tinkywinky = udiv i32 %foo, 0
+  ret i32 %tinkywinky
+}
+
+; CHECK-LABEL: test4
+; CHECK: ret i32 %tinkywinky
+define i32 @test4(i32 %foo) {
+  %tinkywinky = sdiv i32 %foo, 0
+  ret i32 %tinkywinky
+}