diff --git a/llvm/test/Analysis/BasicAA/gep-modulo.ll b/llvm/test/Analysis/BasicAA/gep-modulo.ll index e5aa4901adee..4c3e547e7036 100644 --- a/llvm/test/Analysis/BasicAA/gep-modulo.ll +++ b/llvm/test/Analysis/BasicAA/gep-modulo.ll @@ -81,6 +81,97 @@ define void @may_overflow_mul_sub_i64([16 x i8]* %ptr, i64 %idx) { ret void } +define void @nuw_nsw_mul_sub_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: nuw_nsw_mul_sub_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx +; + %mul = mul nuw nsw i64 %idx, 5 + %sub = sub nuw nsw i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + +define void @only_nsw_mul_sub_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: only_nsw_mul_sub_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx +; + %mul = mul nsw i64 %idx, 5 + %sub = sub nsw i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + +define void @only_nuw_mul_sub_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: only_nuw_mul_sub_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx +; + %mul = mul nuw i64 %idx, 5 + %sub = sub nuw i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + +define void @may_overflow_mul_pow2_sub_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: may_overflow_mul_pow2_sub_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx +; + %mul = mul i64 %idx, 8 + %sub = sub i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + +; Multiplies by power-of-2 preserves modulo and the sub does not wrap. +define void @mul_pow2_sub_nsw_nuw_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: mul_pow2_sub_nsw_nuw_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx +; + %mul = mul i64 %idx, 8 + %sub = sub nuw nsw i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + +define void @may_overflow_shl_sub_i64([16 x i8]* %ptr, i64 %idx) { +; CHECK-LABEL: Function: may_overflow_shl_sub_i64: 3 pointers, 0 call sites +; CHECK-NEXT: MayAlias: [16 x i8]* %ptr, i8* %gep.idx +; CHECK-NEXT: PartialAlias: [16 x i8]* %ptr, i8* %gep.3 +; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx +; + %mul = shl i64 %idx, 2 + %sub = sub i64 %mul, 1 + %gep.idx = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 %sub + store i8 0, i8* %gep.idx, align 1 + %gep.3 = getelementptr [16 x i8], [16 x i8]* %ptr, i32 0, i64 3 + store i8 1, i8* %gep.3, align 1 + ret void +} + ; %gep.idx and %gep.3 must-alias if %mul overflows (e.g. %idx == 110). define void @may_overflow_i32_sext([16 x i8]* %ptr, i32 %idx) { ; CHECK-LABEL: Function: may_overflow_i32_sext: 3 pointers, 0 call sites