; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -instcombine -S | FileCheck %s define i64 @rem_signed(i64 %x1, i64 %y2) { ; CHECK-LABEL: @rem_signed( ; CHECK-NEXT: [[TMP1:%.*]] = srem i64 [[X1:%.*]], [[Y2:%.*]] ; CHECK-NEXT: ret i64 [[TMP1]] ; %r = sdiv i64 %x1, %y2 %r7 = mul i64 %r, %y2 %r8 = sub i64 %x1, %r7 ret i64 %r8 } define <4 x i32> @rem_signed_vec(<4 x i32> %t, <4 x i32> %u) { ; CHECK-LABEL: @rem_signed_vec( ; CHECK-NEXT: [[TMP1:%.*]] = srem <4 x i32> [[T:%.*]], [[U:%.*]] ; CHECK-NEXT: ret <4 x i32> [[TMP1]] ; %k = sdiv <4 x i32> %t, %u %l = mul <4 x i32> %k, %u %m = sub <4 x i32> %t, %l ret <4 x i32> %m } define i64 @rem_unsigned(i64 %x1, i64 %y2) { ; CHECK-LABEL: @rem_unsigned( ; CHECK-NEXT: [[TMP1:%.*]] = urem i64 [[X1:%.*]], [[Y2:%.*]] ; CHECK-NEXT: ret i64 [[TMP1]] ; %r = udiv i64 %x1, %y2 %r7 = mul i64 %r, %y2 %r8 = sub i64 %x1, %r7 ret i64 %r8 } ; PR28672 - https://llvm.org/bugs/show_bug.cgi?id=28672 define i8 @big_divisor(i8 %x) { ; CHECK-LABEL: @big_divisor( ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[X:%.*]], -127 ; CHECK-NEXT: [[TMP2:%.*]] = add i8 [[X]], 127 ; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 [[TMP2]] ; CHECK-NEXT: ret i8 [[REM]] ; %rem = urem i8 %x, 129 ret i8 %rem } define i5 @biggest_divisor(i5 %x) { ; CHECK-LABEL: @biggest_divisor( ; CHECK-NEXT: [[DOTNOT:%.*]] = icmp eq i5 [[X:%.*]], -1 ; CHECK-NEXT: [[REM:%.*]] = select i1 [[DOTNOT]], i5 0, i5 [[X]] ; CHECK-NEXT: ret i5 [[REM]] ; %rem = urem i5 %x, -1 ret i5 %rem } define i8 @urem_with_sext_bool_divisor(i1 %x, i8 %y) { ; CHECK-LABEL: @urem_with_sext_bool_divisor( ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i8 [[Y:%.*]], -1 ; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 0, i8 [[Y]] ; CHECK-NEXT: ret i8 [[REM]] ; %s = sext i1 %x to i8 %rem = urem i8 %y, %s ret i8 %rem } define <2 x i8> @urem_with_sext_bool_divisor_vec(<2 x i1> %x, <2 x i8> %y) { ; CHECK-LABEL: @urem_with_sext_bool_divisor_vec( ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i8> [[Y:%.*]], ; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i8> zeroinitializer, <2 x i8> [[Y]] ; CHECK-NEXT: ret <2 x i8> [[REM]] ; %s = sext <2 x i1> %x to <2 x i8> %rem = urem <2 x i8> %y, %s ret <2 x i8> %rem } define <2 x i4> @big_divisor_vec(<2 x i4> %x) { ; CHECK-LABEL: @big_divisor_vec( ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i4> [[X:%.*]], ; CHECK-NEXT: [[TMP2:%.*]] = add <2 x i4> [[X]], ; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i4> [[X]], <2 x i4> [[TMP2]] ; CHECK-NEXT: ret <2 x i4> [[REM]] ; %rem = urem <2 x i4> %x, ret <2 x i4> %rem } define i8 @urem1(i8 %x, i8 %y) { ; CHECK-LABEL: @urem1( ; CHECK-NEXT: [[TMP1:%.*]] = urem i8 [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: ret i8 [[TMP1]] ; %A = udiv i8 %x, %y %B = mul i8 %A, %y %C = sub i8 %x, %B ret i8 %C } define i8 @srem1(i8 %x, i8 %y) { ; CHECK-LABEL: @srem1( ; CHECK-NEXT: [[TMP1:%.*]] = srem i8 [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: ret i8 [[TMP1]] ; %A = sdiv i8 %x, %y %B = mul i8 %A, %y %C = sub i8 %x, %B ret i8 %C } define i8 @urem2(i8 %x, i8 %y) { ; CHECK-LABEL: @urem2( ; CHECK-NEXT: [[TMP1:%.*]] = urem i8 [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: [[C:%.*]] = sub i8 0, [[TMP1]] ; CHECK-NEXT: ret i8 [[C]] ; %A = udiv i8 %x, %y %B = mul i8 %A, %y %C = sub i8 %B, %x ret i8 %C } define i8 @urem3(i8 %x) { ; CHECK-LABEL: @urem3( ; CHECK-NEXT: [[TMP1:%.*]] = urem i8 [[X:%.*]], 3 ; CHECK-NEXT: [[B_NEG:%.*]] = sub i8 [[X]], [[TMP1]] ; CHECK-NEXT: [[C:%.*]] = add i8 [[B_NEG]], [[X]] ; CHECK-NEXT: ret i8 [[C]] ; %A = udiv i8 %x, 3 %B = mul i8 %A, -3 %C = sub i8 %x, %B ret i8 %C } ; (((X / Y) * Y) / Y) -> X / Y define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) { ; CHECK-LABEL: @sdiv_mul_sdiv( ; CHECK-NEXT: [[R:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: ret i32 [[R]] ; %div = sdiv i32 %x, %y %mul = mul i32 %div, %y %r = sdiv i32 %mul, %y ret i32 %r } ; (((X / Y) * Y) / Y) -> X / Y define i32 @udiv_mul_udiv(i32 %x, i32 %y) { ; CHECK-LABEL: @udiv_mul_udiv( ; CHECK-NEXT: [[R:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]] ; CHECK-NEXT: ret i32 [[R]] ; %div = udiv i32 %x, %y %mul = mul i32 %div, %y %r = udiv i32 %mul, %y ret i32 %r } define i32 @test1(i32 %A) { ; CHECK-LABEL: @test1( ; CHECK-NEXT: ret i32 0 ; %B = srem i32 %A, 1 ; ISA constant 0 ret i32 %B } define i32 @test3(i32 %A) { ; CHECK-LABEL: @test3( ; CHECK-NEXT: [[B:%.*]] = and i32 [[A:%.*]], 7 ; CHECK-NEXT: ret i32 [[B]] ; %B = urem i32 %A, 8 ret i32 %B } define <2 x i32> @vec_power_of_2_constant_splat_divisor(<2 x i32> %A) { ; CHECK-LABEL: @vec_power_of_2_constant_splat_divisor( ; CHECK-NEXT: [[B:%.*]] = and <2 x i32> [[A:%.*]], ; CHECK-NEXT: ret <2 x i32> [[B]] ; %B = urem <2 x i32> %A, ret <2 x i32> %B } define <2 x i19> @weird_vec_power_of_2_constant_splat_divisor(<2 x i19> %A) { ; CHECK-LABEL: @weird_vec_power_of_2_constant_splat_divisor( ; CHECK-NEXT: [[B:%.*]] = and <2 x i19> [[A:%.*]], ; CHECK-NEXT: ret <2 x i19> [[B]] ; %B = urem <2 x i19> %A, ret <2 x i19> %B } define i1 @test3a(i32 %A) { ; CHECK-LABEL: @test3a( ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], 7 ; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[TMP1]], 0 ; CHECK-NEXT: ret i1 [[C]] ; %B = srem i32 %A, -8 %C = icmp ne i32 %B, 0 ret i1 %C } define <2 x i1> @test3a_vec(<2 x i32> %A) { ; CHECK-LABEL: @test3a_vec( ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[A:%.*]], ; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> [[TMP1]], zeroinitializer ; CHECK-NEXT: ret <2 x i1> [[C]] ; %B = srem <2 x i32> %A, %C = icmp ne <2 x i32> %B, zeroinitializer ret <2 x i1> %C } define i32 @test4(i32 %X, i1 %C) { ; CHECK-LABEL: @test4( ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[C:%.*]], i32 0, i32 7 ; CHECK-NEXT: [[R:%.*]] = and i32 [[TMP1]], [[X:%.*]] ; CHECK-NEXT: ret i32 [[R]] ; %V = select i1 %C, i32 1, i32 8 %R = urem i32 %X, %V ret i32 %R } define i32 @test5(i32 %X, i8 %B) { ; CHECK-LABEL: @test5( ; CHECK-NEXT: [[SHIFT_UPGRD_1:%.*]] = zext i8 [[B:%.*]] to i32 ; CHECK-NEXT: [[AMT:%.*]] = shl nuw i32 32, [[SHIFT_UPGRD_1]] ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[AMT]], -1 ; CHECK-NEXT: [[V:%.*]] = and i32 [[TMP1]], [[X:%.*]] ; CHECK-NEXT: ret i32 [[V]] ; %shift.upgrd.1 = zext i8 %B to i32 %Amt = shl i32 32, %shift.upgrd.1 %V = urem i32 %X, %Amt ret i32 %V } define i32 @test6(i32 %A) { ; CHECK-LABEL: @test6( ; CHECK-NEXT: ret i32 poison ; %B = srem i32 %A, 0 ;; undef ret i32 %B } define i32 @test7(i32 %A) { ; CHECK-LABEL: @test7( ; CHECK-NEXT: ret i32 0 ; %B = mul i32 %A, 8 %C = srem i32 %B, 4 ret i32 %C } define i32 @test8(i32 %A) { ; CHECK-LABEL: @test8( ; CHECK-NEXT: ret i32 0 ; %B = shl i32 %A, 4 %C = srem i32 %B, 8 ret i32 %C } define i32 @test9(i32 %A) { ; CHECK-LABEL: @test9( ; CHECK-NEXT: ret i32 0 ; %B = mul i32 %A, 64 %C = urem i32 %B, 32 ret i32 %C } define i32 @test10(i8 %c) { ; CHECK-LABEL: @test10( ; CHECK-NEXT: ret i32 0 ; %tmp.1 = zext i8 %c to i32 %tmp.2 = mul i32 %tmp.1, 4 %tmp.3 = sext i32 %tmp.2 to i64 %tmp.5 = urem i64 %tmp.3, 4 %tmp.6 = trunc i64 %tmp.5 to i32 ret i32 %tmp.6 } define i32 @test11(i32 %i) { ; CHECK-LABEL: @test11( ; CHECK-NEXT: ret i32 0 ; %tmp.1 = and i32 %i, -2 %tmp.3 = mul i32 %tmp.1, 2 %tmp.5 = urem i32 %tmp.3, 4 ret i32 %tmp.5 } define i32 @test12(i32 %i) { ; CHECK-LABEL: @test12( ; CHECK-NEXT: ret i32 0 ; %tmp.1 = and i32 %i, -4 %tmp.5 = srem i32 %tmp.1, 2 ret i32 %tmp.5 } define i32 @test13(i32 %i) { ; CHECK-LABEL: @test13( ; CHECK-NEXT: ret i32 0 ; %x = srem i32 %i, %i ret i32 %x } define i64 @test14(i64 %x, i32 %y) { ; CHECK-LABEL: @test14( ; CHECK-NEXT: [[SHL:%.*]] = shl i32 1, [[Y:%.*]] ; CHECK-NEXT: [[ZEXT:%.*]] = zext i32 [[SHL]] to i64 ; CHECK-NEXT: [[TMP1:%.*]] = add nsw i64 [[ZEXT]], -1 ; CHECK-NEXT: [[UREM:%.*]] = and i64 [[TMP1]], [[X:%.*]] ; CHECK-NEXT: ret i64 [[UREM]] ; %shl = shl i32 1, %y %zext = zext i32 %shl to i64 %urem = urem i64 %x, %zext ret i64 %urem } define i64 @test15(i32 %x, i32 %y) { ; CHECK-LABEL: @test15( ; CHECK-NEXT: [[NOTMASK:%.*]] = shl nsw i32 -1, [[Y:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[NOTMASK]], -1 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], [[X:%.*]] ; CHECK-NEXT: [[UREM:%.*]] = zext i32 [[TMP2]] to i64 ; CHECK-NEXT: ret i64 [[UREM]] ; %shl = shl i32 1, %y %zext0 = zext i32 %shl to i64 %zext1 = zext i32 %x to i64 %urem = urem i64 %zext1, %zext0 ret i64 %urem } define i32 @test16(i32 %x, i32 %y) { ; CHECK-LABEL: @test16( ; CHECK-NEXT: [[SHR:%.*]] = lshr i32 [[Y:%.*]], 11 ; CHECK-NEXT: [[AND:%.*]] = and i32 [[SHR]], 4 ; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[AND]], 3 ; CHECK-NEXT: [[REM:%.*]] = and i32 [[TMP1]], [[X:%.*]] ; CHECK-NEXT: ret i32 [[REM]] ; %shr = lshr i32 %y, 11 %and = and i32 %shr, 4 %add = add i32 %and, 4 %rem = urem i32 %x, %add ret i32 %rem } define i32 @test17(i32 %X) { ; CHECK-LABEL: @test17( ; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i32 [[X:%.*]], 1 ; CHECK-NEXT: [[A:%.*]] = zext i1 [[TMP1]] to i32 ; CHECK-NEXT: ret i32 [[A]] ; %A = urem i32 1, %X ret i32 %A } define i32 @test18(i16 %x, i32 %y) { ; CHECK-LABEL: @test18( ; CHECK-NEXT: [[TMP1:%.*]] = and i16 [[X:%.*]], 4 ; CHECK-NEXT: [[DOTNOT:%.*]] = icmp eq i16 [[TMP1]], 0 ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[DOTNOT]], i32 63, i32 31 ; CHECK-NEXT: [[TMP3:%.*]] = and i32 [[TMP2]], [[Y:%.*]] ; CHECK-NEXT: ret i32 [[TMP3]] ; %1 = and i16 %x, 4 %2 = icmp ne i16 %1, 0 %3 = select i1 %2, i32 32, i32 64 %4 = urem i32 %y, %3 ret i32 %4 } define i32 @test19(i32 %x, i32 %y) { ; CHECK-LABEL: @test19( ; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]] ; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]] ; CHECK-NEXT: [[C:%.*]] = and i32 [[A]], [[B]] ; CHECK-NEXT: [[D:%.*]] = add i32 [[C]], [[A]] ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1 ; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]] ; CHECK-NEXT: ret i32 [[E]] ; %A = shl i32 1, %x %B = shl i32 1, %y %C = and i32 %A, %B %D = add i32 %C, %A %E = urem i32 %y, %D ret i32 %E } define i32 @test19_commutative0(i32 %x, i32 %y) { ; CHECK-LABEL: @test19_commutative0( ; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]] ; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]] ; CHECK-NEXT: [[C:%.*]] = and i32 [[B]], [[A]] ; CHECK-NEXT: [[D:%.*]] = add i32 [[C]], [[A]] ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1 ; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]] ; CHECK-NEXT: ret i32 [[E]] ; %A = shl i32 1, %x %B = shl i32 1, %y %C = and i32 %B, %A ; swapped %D = add i32 %C, %A %E = urem i32 %y, %D ret i32 %E } define i32 @test19_commutative1(i32 %x, i32 %y) { ; CHECK-LABEL: @test19_commutative1( ; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]] ; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]] ; CHECK-NEXT: [[C:%.*]] = and i32 [[A]], [[B]] ; CHECK-NEXT: [[D:%.*]] = add i32 [[A]], [[C]] ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1 ; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]] ; CHECK-NEXT: ret i32 [[E]] ; %A = shl i32 1, %x %B = shl i32 1, %y %C = and i32 %A, %B %D = add i32 %A, %C ; swapped %E = urem i32 %y, %D ret i32 %E } define i32 @test19_commutative2(i32 %x, i32 %y) { ; CHECK-LABEL: @test19_commutative2( ; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]] ; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]] ; CHECK-NEXT: [[C:%.*]] = and i32 [[B]], [[A]] ; CHECK-NEXT: [[D:%.*]] = add i32 [[A]], [[C]] ; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1 ; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]] ; CHECK-NEXT: ret i32 [[E]] ; %A = shl i32 1, %x %B = shl i32 1, %y %C = and i32 %B, %A ; swapped %D = add i32 %A, %C ; swapped %E = urem i32 %y, %D ret i32 %E } define <2 x i64> @test20(<2 x i64> %X, <2 x i1> %C) { ; CHECK-LABEL: @test20( ; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[C:%.*]], <2 x i64> , <2 x i64> zeroinitializer ; CHECK-NEXT: ret <2 x i64> [[R]] ; %V = select <2 x i1> %C, <2 x i64> , <2 x i64> %R = urem <2 x i64> %V, ret <2 x i64> %R } define i32 @test21(i1 %c0, i32* %p) { ; CHECK-LABEL: @test21( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C0:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] ; CHECK: if.then: ; CHECK-NEXT: [[V:%.*]] = load volatile i32, i32* [[P:%.*]], align 4 ; CHECK-NEXT: [[PHI_BO:%.*]] = srem i32 [[V]], 5 ; CHECK-NEXT: br label [[IF_END]] ; CHECK: if.end: ; CHECK-NEXT: [[LHS:%.*]] = phi i32 [ [[PHI_BO]], [[IF_THEN]] ], [ 0, [[ENTRY:%.*]] ] ; CHECK-NEXT: ret i32 [[LHS]] ; entry: br i1 %c0, label %if.then, label %if.end if.then: %v = load volatile i32, i32* %p br label %if.end if.end: %lhs = phi i32 [ %v, %if.then ], [ 5, %entry ] %rem = srem i32 %lhs, 5 ret i32 %rem } @a = common global [5 x i16] zeroinitializer, align 2 @b = common global i16 0, align 2 define i32 @pr27968_0(i1 %c0, i32* %p) { ; CHECK-LABEL: @pr27968_0( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C0:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] ; CHECK: if.then: ; CHECK-NEXT: [[V:%.*]] = load volatile i32, i32* [[P:%.*]], align 4 ; CHECK-NEXT: br label [[IF_END]] ; CHECK: if.end: ; CHECK-NEXT: br i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b), label [[REM_IS_SAFE:%.*]], label [[REM_IS_UNSAFE:%.*]] ; CHECK: rem.is.safe: ; CHECK-NEXT: ret i32 0 ; CHECK: rem.is.unsafe: ; CHECK-NEXT: ret i32 0 ; entry: br i1 %c0, label %if.then, label %if.end if.then: %v = load volatile i32, i32* %p br label %if.end if.end: %lhs = phi i32 [ %v, %if.then ], [ 5, %entry ] br i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b), label %rem.is.safe, label %rem.is.unsafe rem.is.safe: %rem = srem i32 %lhs, zext (i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b) to i32) ret i32 %rem rem.is.unsafe: ret i32 0 } define i32 @pr27968_1(i1 %c0, i1 %always_false, i32* %p) { ; CHECK-LABEL: @pr27968_1( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C0:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] ; CHECK: if.then: ; CHECK-NEXT: [[V:%.*]] = load volatile i32, i32* [[P:%.*]], align 4 ; CHECK-NEXT: br label [[IF_END]] ; CHECK: if.end: ; CHECK-NEXT: [[LHS:%.*]] = phi i32 [ [[V]], [[IF_THEN]] ], [ 5, [[ENTRY:%.*]] ] ; CHECK-NEXT: br i1 [[ALWAYS_FALSE:%.*]], label [[REM_IS_SAFE:%.*]], label [[REM_IS_UNSAFE:%.*]] ; CHECK: rem.is.safe: ; CHECK-NEXT: [[REM:%.*]] = srem i32 [[LHS]], -2147483648 ; CHECK-NEXT: ret i32 [[REM]] ; CHECK: rem.is.unsafe: ; CHECK-NEXT: ret i32 0 ; entry: br i1 %c0, label %if.then, label %if.end if.then: %v = load volatile i32, i32* %p br label %if.end if.end: %lhs = phi i32 [ %v, %if.then ], [ 5, %entry ] br i1 %always_false, label %rem.is.safe, label %rem.is.unsafe rem.is.safe: %rem = srem i32 %lhs, -2147483648 ret i32 %rem rem.is.unsafe: ret i32 0 } define i32 @pr27968_2(i1 %c0, i32* %p) { ; CHECK-LABEL: @pr27968_2( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C0:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] ; CHECK: if.then: ; CHECK-NEXT: [[V:%.*]] = load volatile i32, i32* [[P:%.*]], align 4 ; CHECK-NEXT: br label [[IF_END]] ; CHECK: if.end: ; CHECK-NEXT: br i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b), label [[REM_IS_SAFE:%.*]], label [[REM_IS_UNSAFE:%.*]] ; CHECK: rem.is.safe: ; CHECK-NEXT: ret i32 0 ; CHECK: rem.is.unsafe: ; CHECK-NEXT: ret i32 0 ; entry: br i1 %c0, label %if.then, label %if.end if.then: %v = load volatile i32, i32* %p br label %if.end if.end: %lhs = phi i32 [ %v, %if.then ], [ 5, %entry ] br i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b), label %rem.is.safe, label %rem.is.unsafe rem.is.safe: %rem = urem i32 %lhs, zext (i1 icmp eq (i16* getelementptr inbounds ([5 x i16], [5 x i16]* @a, i64 0, i64 4), i16* @b) to i32) ret i32 %rem rem.is.unsafe: ret i32 0 } define i32 @pr27968_3(i1 %c0, i1 %always_false, i32* %p) { ; CHECK-LABEL: @pr27968_3( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C0:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] ; CHECK: if.then: ; CHECK-NEXT: [[V:%.*]] = load volatile i32, i32* [[P:%.*]], align 4 ; CHECK-NEXT: [[PHI_BO:%.*]] = and i32 [[V]], 2147483647 ; CHECK-NEXT: br label [[IF_END]] ; CHECK: if.end: ; CHECK-NEXT: [[LHS:%.*]] = phi i32 [ [[PHI_BO]], [[IF_THEN]] ], [ 5, [[ENTRY:%.*]] ] ; CHECK-NEXT: br i1 [[ALWAYS_FALSE:%.*]], label [[REM_IS_SAFE:%.*]], label [[REM_IS_UNSAFE:%.*]] ; CHECK: rem.is.safe: ; CHECK-NEXT: ret i32 [[LHS]] ; CHECK: rem.is.unsafe: ; CHECK-NEXT: ret i32 0 ; entry: br i1 %c0, label %if.then, label %if.end if.then: %v = load volatile i32, i32* %p br label %if.end if.end: %lhs = phi i32 [ %v, %if.then ], [ 5, %entry ] br i1 %always_false, label %rem.is.safe, label %rem.is.unsafe rem.is.safe: %rem = urem i32 %lhs, -2147483648 ret i32 %rem rem.is.unsafe: ret i32 0 } define i32 @test22(i32 %A) { ; CHECK-LABEL: @test22( ; CHECK-NEXT: [[AND:%.*]] = and i32 [[A:%.*]], 2147483647 ; CHECK-NEXT: [[MUL:%.*]] = urem i32 [[AND]], 2147483647 ; CHECK-NEXT: ret i32 [[MUL]] ; %and = and i32 %A, 2147483647 %mul = srem i32 %and, 2147483647 ret i32 %mul } define <2 x i32> @test23(<2 x i32> %A) { ; CHECK-LABEL: @test23( ; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[A:%.*]], ; CHECK-NEXT: [[MUL:%.*]] = urem <2 x i32> [[AND]], ; CHECK-NEXT: ret <2 x i32> [[MUL]] ; %and = and <2 x i32> %A, %mul = srem <2 x i32> %and, ret <2 x i32> %mul } define i1 @test24(i32 %A) { ; CHECK-LABEL: @test24( ; CHECK-NEXT: [[B:%.*]] = and i32 [[A:%.*]], 2147483647 ; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[B]], 0 ; CHECK-NEXT: ret i1 [[C]] ; %B = urem i32 %A, 2147483648 ; signbit %C = icmp ne i32 %B, 0 ret i1 %C } define <2 x i1> @test24_vec(<2 x i32> %A) { ; CHECK-LABEL: @test24_vec( ; CHECK-NEXT: [[B:%.*]] = and <2 x i32> [[A:%.*]], ; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> [[B]], zeroinitializer ; CHECK-NEXT: ret <2 x i1> [[C]] ; %B = urem <2 x i32> %A, %C = icmp ne <2 x i32> %B, zeroinitializer ret <2 x i1> %C } define i1 @test25(i32 %A) { ; CHECK-LABEL: @test25( ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], 2147483647 ; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[TMP1]], 0 ; CHECK-NEXT: ret i1 [[C]] ; %B = srem i32 %A, 2147483648 ; signbit %C = icmp ne i32 %B, 0 ret i1 %C } define <2 x i1> @test25_vec(<2 x i32> %A) { ; CHECK-LABEL: @test25_vec( ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[A:%.*]], ; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> [[TMP1]], zeroinitializer ; CHECK-NEXT: ret <2 x i1> [[C]] ; %B = srem <2 x i32> %A, %C = icmp ne <2 x i32> %B, zeroinitializer ret <2 x i1> %C } define i1 @test26(i32 %A, i32 %B) { ; CHECK-LABEL: @test26( ; CHECK-NEXT: [[NOTMASK:%.*]] = shl nsw i32 -1, [[B:%.*]] ; CHECK-NEXT: [[TMP1:%.*]] = xor i32 [[NOTMASK]], -1 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], [[A:%.*]] ; CHECK-NEXT: [[E:%.*]] = icmp ne i32 [[TMP2]], 0 ; CHECK-NEXT: ret i1 [[E]] ; %C = shl i32 1, %B ; not a constant %D = srem i32 %A, %C %E = icmp ne i32 %D, 0 ret i1 %E } define i1 @test27(i32 %A, i32* %remdst) { ; CHECK-LABEL: @test27( ; CHECK-NEXT: [[B:%.*]] = srem i32 [[A:%.*]], -2147483648 ; CHECK-NEXT: store i32 [[B]], i32* [[REMDST:%.*]], align 1 ; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[B]], 0 ; CHECK-NEXT: ret i1 [[C]] ; %B = srem i32 %A, 2147483648 ; signbit store i32 %B, i32* %remdst, align 1 ; extra use of rem %C = icmp ne i32 %B, 0 ret i1 %C } define i1 @test28(i32 %A) { ; CHECK-LABEL: @test28( ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[A:%.*]], 2147483647 ; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[TMP1]], 0 ; CHECK-NEXT: ret i1 [[C]] ; %B = srem i32 %A, 2147483648 ; signbit %C = icmp eq i32 %B, 0 ; another equality predicate ret i1 %C } ; FP division-by-zero is not UB. define double @PR34870(i1 %cond, double %x, double %y) { ; CHECK-LABEL: @PR34870( ; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], double [[Y:%.*]], double 0.000000e+00 ; CHECK-NEXT: [[FMOD:%.*]] = frem double [[X:%.*]], [[SEL]] ; CHECK-NEXT: ret double [[FMOD]] ; %sel = select i1 %cond, double %y, double 0.0 %fmod = frem double %x, %sel ret double %fmod }