InstCombine: Don't assume that m_ZExt matches an Instruction

[oota-llvm.git] / test / Transforms / InstCombine / not.ll

diff --git a/test/Transforms/InstCombine/not.ll b/test/Transforms/InstCombine/not.ll
index 8bc858664999f3ddd0a1c88acccbe1ac9bdcbe5f..4a8825b15c4e15102d3f1ba6bfbc94e7eb493c81 100644 (file)
--- a/test/Transforms/InstCombine/not.ll
+++ b/test/Transforms/InstCombine/not.ll
@@ -1,21 +1,54 @@
 ; This test makes sure that these instructions are properly eliminated.
 ;
 
-; RUN: if as < %s | opt -instcombine -die | dis | grep xor
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+; RUN: opt < %s -instcombine -S | not grep xor
 
-implementation
+define i32 @test1(i32 %A) {
+        %B = xor i32 %A, -1             ; <i32> [#uses=1]
+        %C = xor i32 %B, -1             ; <i32> [#uses=1]
+        ret i32 %C
+}
+
+define i1 @test2(i32 %A, i32 %B) {
+        ; Can change into setge
+        %cond = icmp sle i32 %A, %B             ; <i1> [#uses=1]
+        %Ret = xor i1 %cond, true               ; <i1> [#uses=1]
+        ret i1 %Ret
+}
+
+; Test that demorgans law can be instcombined
+define i32 @test3(i32 %A, i32 %B) {
+        %a = xor i32 %A, -1             ; <i32> [#uses=1]
+        %b = xor i32 %B, -1             ; <i32> [#uses=1]
+        %c = and i32 %a, %b             ; <i32> [#uses=1]
+        %d = xor i32 %c, -1             ; <i32> [#uses=1]
+        ret i32 %d
+}
+
+; Test that demorgens law can work with constants
+define i32 @test4(i32 %A, i32 %B) {
+        %a = xor i32 %A, -1             ; <i32> [#uses=1]
+        %c = and i32 %a, 5              ; <i32> [#uses=1]
+        %d = xor i32 %c, -1             ; <i32> [#uses=1]
+        ret i32 %d
+}
 
-int %test1(int %A) {
-       %B = xor int %A, -1
-       %C = xor int %B, -1
-       ret int %C
+; test the mirror of demorgans law...
+define i32 @test5(i32 %A, i32 %B) {
+        %a = xor i32 %A, -1             ; <i32> [#uses=1]
+        %b = xor i32 %B, -1             ; <i32> [#uses=1]
+        %c = or i32 %a, %b              ; <i32> [#uses=1]
+        %d = xor i32 %c, -1             ; <i32> [#uses=1]
+        ret i32 %d
 }
 
-bool %test2(int %A, int %B) {
-       %cond = setle int %A, %B     ; Can change into setge
-       %Ret = xor bool %cond, true
-       ret bool %Ret
+; PR2298
+define zeroext i8 @test6(i32 %a, i32 %b)  nounwind  {
+entry:
+       %tmp1not = xor i32 %a, -1               ; <i32> [#uses=1]
+       %tmp2not = xor i32 %b, -1               ; <i32> [#uses=1]
+       %tmp3 = icmp slt i32 %tmp1not, %tmp2not         ; <i1> [#uses=1]
+       %retval67 = zext i1 %tmp3 to i8         ; <i8> [#uses=1]
+       ret i8 %retval67
 }
+