diff options
Diffstat (limited to 'test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll')
-rw-r--r-- | test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll | 56 |
1 files changed, 42 insertions, 14 deletions
diff --git a/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll b/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll index d1792d1e075b..2957ad5731c7 100644 --- a/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll +++ b/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll @@ -23,18 +23,6 @@ define i1 @p0(i8 %x) { ret i1 %ret } -define i1 @pv(i8 %x, i8 %y) { -; CHECK-LABEL: @pv( -; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]] -; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i8 [[TMP0]], [[X:%.*]] -; CHECK-NEXT: ret i1 [[TMP1]] -; - %tmp0 = lshr i8 -1, %y - %tmp1 = and i8 %tmp0, %x - %ret = icmp slt i8 %tmp1, %x - ret i1 %ret -} - ; ============================================================================ ; ; Vector tests ; ============================================================================ ; @@ -120,8 +108,9 @@ define i1 @cv0(i8 %y) { ; CHECK-LABEL: @cv0( ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8() ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]] -; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i8 [[X]], [[TMP0]] -; CHECK-NEXT: ret i1 [[TMP1]] +; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], [[TMP0]] +; CHECK-NEXT: [[RET:%.*]] = icmp slt i8 [[TMP1]], [[X]] +; CHECK-NEXT: ret i1 [[RET]] ; %x = call i8 @gen8() %tmp0 = lshr i8 -1, %y @@ -196,3 +185,42 @@ define <2 x i1> @n2(<2 x i8> %x) { %ret = icmp slt <2 x i8> %tmp0, %x ret <2 x i1> %ret } + +; ============================================================================ ; +; Potential miscompiles. +; ============================================================================ ; + +define i1 @nv(i8 %x, i8 %y) { +; CHECK-LABEL: @nv( +; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[TMP0]], [[X:%.*]] +; CHECK-NEXT: [[RET:%.*]] = icmp slt i8 [[TMP1]], [[X]] +; CHECK-NEXT: ret i1 [[RET]] +; + %tmp0 = lshr i8 -1, %y + %tmp1 = and i8 %tmp0, %x + %ret = icmp slt i8 %tmp1, %x + ret i1 %ret +} + +define <2 x i1> @n3(<2 x i8> %x) { +; CHECK-LABEL: @n3( +; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 -1> +; CHECK-NEXT: [[RET:%.*]] = icmp slt <2 x i8> [[TMP0]], [[X]] +; CHECK-NEXT: ret <2 x i1> [[RET]] +; + %tmp0 = and <2 x i8> %x, <i8 3, i8 -1> + %ret = icmp slt <2 x i8> %tmp0, %x + ret <2 x i1> %ret +} + +define <3 x i1> @n4(<3 x i8> %x) { +; CHECK-LABEL: @n4( +; CHECK-NEXT: [[TMP0:%.*]] = and <3 x i8> [[X:%.*]], <i8 3, i8 undef, i8 -1> +; CHECK-NEXT: [[RET:%.*]] = icmp slt <3 x i8> [[TMP0]], [[X]] +; CHECK-NEXT: ret <3 x i1> [[RET]] +; + %tmp0 = and <3 x i8> %x, <i8 3, i8 undef, i8 -1> + %ret = icmp slt <3 x i8> %tmp0, %x + ret <3 x i1> %ret +} |