1 files changed, 83 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/rem.ll b/test/Transforms/InstCombine/rem.ll
new file mode 100644
index 0000000..bac248e
--- /dev/null
+++ b/test/Transforms/InstCombine/rem.ll
@@ -0,0 +1,83 @@
+; This test makes sure that these instructions are properly eliminated.
+;
+; RUN: opt < %s -instcombine -S | not grep rem
+; END.
+
+define i32 @test1(i32 %A) {
+	%B = srem i32 %A, 1	; ISA constant 0
+	ret i32 %B
+}
+
+define i32 @test2(i32 %A) {	; 0 % X = 0, we don't need to preserve traps
+	%B = srem i32 0, %A
+	ret i32 %B
+}
+
+define i32 @test3(i32 %A) {
+	%B = urem i32 %A, 8
+	ret i32 %B
+}
+
+define i1 @test3a(i32 %A) {
+	%B = srem i32 %A, -8
+	%C = icmp ne i32 %B, 0
+	ret i1 %C
+}
+
+define i32 @test4(i32 %X, i1 %C) {
+	%V = select i1 %C, i32 1, i32 8
+	%R = urem i32 %X, %V
+	ret i32 %R
+}
+
+define i32 @test5(i32 %X, i8 %B) {
+	%shift.upgrd.1 = zext i8 %B to i32
+	%Amt = shl i32 32, %shift.upgrd.1
+	%V = urem i32 %X, %Amt
+	ret i32 %V
+}
+
+define i32 @test6(i32 %A) {
+	%B = srem i32 %A, 0	;; undef
+	ret i32 %B
+}
+
+define i32 @test7(i32 %A) {
+	%B = mul i32 %A, 8
+	%C = srem i32 %B, 4
+	ret i32 %C
+}
+
+define i32 @test8(i32 %A) {
+	%B = shl i32 %A, 4
+	%C = srem i32 %B, 8
+	ret i32 %C
+}
+
+define i32 @test9(i32 %A) {
+	%B = mul i32 %A, 64
+	%C = urem i32 %B, 32
+	ret i32 %C
+}
+
+define i32 @test10(i8 %c) {
+	%tmp.1 = zext i8 %c to i32
+	%tmp.2 = mul i32 %tmp.1, 4
+	%tmp.3 = sext i32 %tmp.2 to i64
+	%tmp.5 = urem i64 %tmp.3, 4
+	%tmp.6 = trunc i64 %tmp.5 to i32
+	ret i32 %tmp.6
+}
+
+define i32 @test11(i32 %i) {
+	%tmp.1 = and i32 %i, -2
+	%tmp.3 = mul i32 %tmp.1, 2
+	%tmp.5 = urem i32 %tmp.3, 4
+	ret i32 %tmp.5
+}
+
+define i32 @test12(i32 %i) {
+	%tmp.1 = and i32 %i, -4
+	%tmp.5 = srem i32 %tmp.1, 2
+	ret i32 %tmp.5
+}