diff options
Diffstat (limited to 'test/Transforms')
-rw-r--r-- | test/Transforms/InstSimplify/compare.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll index 2cbd641a74..3ece118902 100644 --- a/test/Transforms/InstSimplify/compare.ll +++ b/test/Transforms/InstSimplify/compare.ll @@ -323,3 +323,34 @@ define i1 @and1(i32 %X) { ret i1 %B ; CHECK: ret i1 false } + +define i1 @mul1(i32 %X) { +; CHECK: @mul1 +; Square of a non-zero number is non-zero if there is no overflow. + %Y = or i32 %X, 1 + %M = mul nuw i32 %Y, %Y + %C = icmp eq i32 %M, 0 + ret i1 %C +; CHECK: ret i1 false +} + +define i1 @mul2(i32 %X) { +; CHECK: @mul2 +; Square of a non-zero number is positive if there is no signed overflow. + %Y = or i32 %X, 1 + %M = mul nsw i32 %Y, %Y + %C = icmp sgt i32 %M, 0 + ret i1 %C +; CHECK: ret i1 true +} + +define i1 @mul3(i32 %X, i32 %Y) { +; CHECK: @mul3 +; Product of non-negative numbers is non-negative if there is no signed overflow. + %XX = mul nsw i32 %X, %X + %YY = mul nsw i32 %Y, %Y + %M = mul nsw i32 %XX, %YY + %C = icmp sge i32 %M, 0 + ret i1 %C +; CHECK: ret i1 true +} |