New testcase crashing the instruction combiner

[oota-llvm.git] / test / Transforms / InstCombine / sub.ll

diff --git a/test/Transforms/InstCombine/sub.ll b/test/Transforms/InstCombine/sub.ll
index c2a6124536d740273f46728541440f06a31d1766..4f2a1c9ce03545ba6712923f8200a37348ec7813 100644 (file)
--- a/test/Transforms/InstCombine/sub.ll
+++ b/test/Transforms/InstCombine/sub.ll
@@ -1,37 +1,76 @@
 ; This test makes sure that these instructions are properly eliminated.
 ;
 
-; RUN: if as < %s | opt -instcombine -dce | dis | grep sub | grep -v 'sub int %Cok, %Bok'
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+; RUN: llvm-as < %s | opt -instcombine -die | llvm-dis | grep sub | not grep -v 'sub int %Cok, %Bok'
 
 implementation
 
-int "test1"(int %A) {
+int %test1(int %A) {
        %B = sub int %A, %A    ; ISA constant 0
        ret int %B
 }
 
-int "test2"(int %A) {
+int %test2(int %A) {
        %B = sub int %A, 0
        ret int %B
 }
 
-int "test3"(int %A) {
+int %test3(int %A) {
        %B = sub int 0, %A       ; B = -A
        %C = sub int 0, %B       ; C = -B = A
        ret int %C
 }
 
-int "test4"(int %A, int %x) {
+int %test4(int %A, int %x) {
        %B = sub int 0, %A
        %C = sub int %x, %B
        ret int %C
 }
 
-int "test5"(int %A, int %Bok, int %Cok) {
+int %test5(int %A, int %Bok, int %Cok) {
        %D = sub int %Bok, %Cok
        %E = sub int %A, %D
        ret int %E
 }
+
+int %test6(int %A, int %B) {
+       %C = and int %A, %B   ; A - (A & B) => A & ~B
+       %D = sub int %A, %C
+       ret int %D
+}
+
+int %test7(int %A) {
+       %B = sub int -1, %A   ; B = ~A
+       ret int %B
+}
+
+int %test8(int %A) {
+        %B = mul int 9, %A
+        %C = sub int %B, %A      ; C = 9*A-A == A*8 == A << 3
+        ret int %C
+}
+
+int %test9(int %A) {
+        %B = mul int 3, %A
+        %C = sub int %A, %B      ; C = A-3*A == A*-2
+        ret int %C
+}
+
+int %test10(int %A, int %B) {    ; -A*-B == A*B
+       %C = sub int 0, %A
+       %D = sub int 0, %B
+       %E = mul int %C, %D
+       ret int %E
+}
+
+int %test10(int %A) {    ; -A *c1 == A * -c1
+       %C = sub int 0, %A
+       %E = mul int %C, 7
+       ret int %E
+}
+
+bool %test11(ubyte %A, ubyte %B) {
+        %C = sub ubyte %A, %B
+        %cD = setne ubyte %C, 0    ; == setne A, B
+        ret bool %cD
+}