It's not necessary to do rounding for alloca operations when the requested

alignment is equal to the stack alignment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 57 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/apint-and1.ll b/test/Transforms/InstCombine/apint-and1.ll
new file mode 100644
index 0000000..eb3b1a6
--- /dev/null
+++ b/test/Transforms/InstCombine/apint-and1.ll
@@ -0,0 +1,57 @@
+; This test makes sure that and instructions are properly eliminated.
+; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
+
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {and }
+; END.
+
+define i39 @test0(i39 %A) {
+        %B = and i39 %A, 0 ; zero result
+        ret i39 %B
+}
+
+define i47 @test1(i47 %A, i47 %B) {
+        ;; (~A & ~B) == (~(A | B)) - De Morgan's Law
+        %NotA = xor i47 %A, -1
+        %NotB = xor i47 %B, -1
+        %C1 = and i47 %NotA, %NotB
+        ret i47 %C1
+}
+
+define i15 @test2(i15 %x) {
+        %tmp.2 = and i15 %x, -1 ; noop
+        ret i15 %tmp.2
+}
+
+define i23 @test3(i23 %x) {
+        %tmp.0 = and i23 %x, 127
+        %tmp.2 = and i23 %tmp.0, 128
+        ret i23 %tmp.2
+}
+
+define i1 @test4(i37 %x) {
+        %A = and i37 %x, -2147483648
+        %B = icmp ne i37 %A, 0
+        ret i1 %B
+}
+
+define i7 @test5(i7 %A, i7* %P) {
+        %B = or i7 %A, 3
+        %C = xor i7 %B, 12
+        store i7 %C, i7* %P
+        %r = and i7 %C, 3
+        ret i7 %r
+}
+
+define i7 @test6(i7 %A, i7 %B) {
+        ;; ~(~X & Y) --> (X | ~Y)
+        %t0 = xor i7 %A, -1
+        %t1 = and i7 %t0, %B
+        %r = xor i7 %t1, -1
+        ret i7 %r
+}
+
+define i47 @test7(i47 %A) {
+        %X = ashr i47 %A, 39 ;; sign extend
+        %C1 = and i47 %X, 255
+        ret i47 %C1
+}