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, 39 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/apint-elim-logicalops.ll b/test/Transforms/InstCombine/apint-elim-logicalops.ll
new file mode 100644
index 0000000..13d032c
--- /dev/null
+++ b/test/Transforms/InstCombine/apint-elim-logicalops.ll
@@ -0,0 +1,39 @@
+; Test that elimination of logical operators works with 
+; arbitrary precision integers.
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
+; RUN:    not grep {(and\|xor\|add\|shl\|shr)}
+; END.
+
+define i33 @test1(i33 %x) {
+        %tmp.1 = and i33 %x, 65535           ; <i33> [#uses=1]
+        %tmp.2 = xor i33 %tmp.1, -32768      ; <i33> [#uses=1]
+        %tmp.3 = add i33 %tmp.2, 32768       ; <i33> [#uses=1]
+        ret i33 %tmp.3
+}
+
+define i33 @test2(i33 %x) {
+        %tmp.1 = and i33 %x, 65535           ; <i33> [#uses=1]
+        %tmp.2 = xor i33 %tmp.1, 32768       ; <i33> [#uses=1]
+        %tmp.3 = add i33 %tmp.2, -32768      ; <i33> [#uses=1]
+        ret i33 %tmp.3
+}
+
+define i33 @test3(i16 %P) {
+        %tmp.1 = zext i16 %P to i33          ; <i33> [#uses=1]
+        %tmp.4 = xor i33 %tmp.1, 32768       ; <i33> [#uses=1]
+        %tmp.5 = add i33 %tmp.4, -32768      ; <i33> [#uses=1]
+        ret i33 %tmp.5
+}
+
+define i33 @test5(i33 %x) {
+	%tmp.1 = and i33 %x, 254
+	%tmp.2 = xor i33 %tmp.1, 128
+	%tmp.3 = add i33 %tmp.2, -128
+	ret i33 %tmp.3
+}
+
+define i33 @test6(i33 %x) {
+        %tmp.2 = shl i33 %x, 16           ; <i33> [#uses=1]
+        %tmp.4 = lshr i33 %tmp.2, 16      ; <i33> [#uses=1]
+        ret i33 %tmp.4
+}