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Diffstat (limited to 'test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll')
-rw-r--r--test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll56
1 files changed, 42 insertions, 14 deletions
diff --git a/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll b/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll
index 7be784a452fd..ca1b86c0623a 100644
--- a/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll
+++ b/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.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 sge i8 [[TMP0]], [[X:%.*]]
-; CHECK-NEXT: ret i1 [[TMP1]]
-;
- %tmp0 = lshr i8 -1, %y
- %tmp1 = and i8 %tmp0, %x
- %ret = icmp sge 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 sle i8 [[X]], [[TMP0]]
-; CHECK-NEXT: ret i1 [[TMP1]]
+; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], [[TMP0]]
+; CHECK-NEXT: [[RET:%.*]] = icmp sge 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 sge <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 sge i8 [[TMP1]], [[X]]
+; CHECK-NEXT: ret i1 [[RET]]
+;
+ %tmp0 = lshr i8 -1, %y
+ %tmp1 = and i8 %tmp0, %x
+ %ret = icmp sge i8 %tmp1, %x
+ ret i1 %ret
+}
+
+define <2 x i1> @n3_vec(<2 x i8> %x) {
+; CHECK-LABEL: @n3_vec(
+; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 -1>
+; CHECK-NEXT: [[RET:%.*]] = icmp sge <2 x i8> [[TMP0]], [[X]]
+; CHECK-NEXT: ret <2 x i1> [[RET]]
+;
+ %tmp0 = and <2 x i8> %x, <i8 3, i8 -1>
+ %ret = icmp sge <2 x i8> %tmp0, %x
+ ret <2 x i1> %ret
+}
+
+define <3 x i1> @n4_vec(<3 x i8> %x) {
+; CHECK-LABEL: @n4_vec(
+; CHECK-NEXT: [[TMP0:%.*]] = and <3 x i8> [[X:%.*]], <i8 3, i8 undef, i8 -1>
+; CHECK-NEXT: [[RET:%.*]] = icmp sge <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 sge <3 x i8> %tmp0, %x
+ ret <3 x i1> %ret
+}