[Fixed Point Arithmetic] Fixed Point Addition
This patch covers addition between fixed point types and other fixed point
types or integers, using the conversion rules described in 4.1.4 of N1169.
Usual arithmetic rules do not apply to binary operations when one of the
operands is a fixed point type, and the result of the operation must be
calculated with the full precision of the operands, so we should not perform
any casting to a common type.
This patch does not include constant expression evaluation for addition of
fixed point types. That will be addressed in another patch since I think this
one is already big enough.
Differential Revision: https://reviews.llvm.org/D53738
llvm-svn: 351364
diff --git a/clang/test/Frontend/fixed_point_add.c b/clang/test/Frontend/fixed_point_add.c
new file mode 100644
index 0000000..ff3cdb9
--- /dev/null
+++ b/clang/test/Frontend/fixed_point_add.c
@@ -0,0 +1,390 @@
+// RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,SIGNED
+// RUN: %clang_cc1 -ffixed-point -fpadding-on-unsigned-fixed-point -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,UNSIGNED
+
+void SignedAddition() {
+ // CHECK-LABEL: SignedAddition
+ short _Accum sa;
+ _Accum a, b, c, d;
+ long _Accum la;
+ unsigned short _Accum usa;
+ unsigned _Accum ua;
+ unsigned long _Accum ula;
+
+ short _Fract sf;
+ _Fract f;
+ long _Fract lf;
+ unsigned short _Fract usf;
+ unsigned _Fract uf;
+ unsigned long _Fract ulf;
+
+ // Same type
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[SA2:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[SA2]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
+ sa = sa + sa;
+
+ // To larger scale and larger width
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[A:%[0-9]+]] = load i32, i32* %a, align 4
+ // CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
+ // CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[SA]], [[A]]
+ // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
+ a = sa + a;
+
+ // To same scale and smaller width
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
+ // CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i16
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[EXT_SF]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
+ sa = sa + sf;
+
+ // To smaller scale and same width.
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[F:%[0-9]+]] = load i16, i16* %f, align 2
+ // CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i24
+ // CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i24 [[EXT_SA]], 8
+ // CHECK-NEXT: [[EXT_F:%[a-z0-9]+]] = sext i16 [[F]] to i24
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i24 [[SA]], [[EXT_F]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i24 [[SUM]], 8
+ // CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
+ // CHECK-NEXT: store i16 [[TRUNC_RES]], i16* %sa, align 2
+ sa = sa + f;
+
+ // To smaller scale and smaller width
+ // CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
+ // CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
+ // CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i32
+ // CHECK-NEXT: [[SF:%[a-z0-9]+]] = shl i32 [[EXT_SF]], 8
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[A]], [[SF]]
+ // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
+ a = a + sf;
+
+ // To larger scale and same width
+ // CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
+ // CHECK-NEXT: [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
+ // CHECK-NEXT: [[EXT_A:%[a-z0-9]+]] = sext i32 [[A]] to i48
+ // CHECK-NEXT: [[A:%[a-z0-9]+]] = shl i48 [[EXT_A]], 16
+ // CHECK-NEXT: [[EXT_LF:%[a-z0-9]+]] = sext i32 [[LF]] to i48
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i48 [[A]], [[EXT_LF]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i48 [[SUM]], 16
+ // CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i48 [[RES]] to i32
+ // CHECK-NEXT: store i32 [[TRUNC_RES]], i32* %a, align 4
+ a = a + lf;
+
+ // With corresponding unsigned type
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
+ // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
+ // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i17
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i17 [[SA]], [[USA_EXT]]
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
+ // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[USA]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
+ sa = sa + usa;
+
+ // With unsigned of larger scale
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[USA:%[0-9]+]] = load i32, i32* %ua, align 4
+ // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i33
+ // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i33 [[SA_EXT]], 9
+ // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i32 [[USA]] to i33
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i33 [[SA]], [[USA_EXT]]
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i33 [[SUM]], 1
+ // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i33 [[RESULT]] to i32
+ // UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
+ // UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i32 [[SA]], [[USA]]
+ // CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
+ a = sa + ua;
+
+ // With unsigned of smaller width
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
+ // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
+ // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
+ // SIGNED-NEXT: [[USF_EXT:%[a-z0-9]+]] = zext i8 [[USF]] to i17
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i17 [[SA]], [[USF_EXT]]
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
+ // SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
+ // UNSIGNED-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i16 [[SA]], [[EXT_USF]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
+ sa = sa + usf;
+
+ // With unsigned of larger width and smaller scale
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[ULF:%[0-9]+]] = load i32, i32* %ulf, align 4
+ // SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i41
+ // SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i41 [[SA_EXT]], 25
+ // SIGNED-NEXT: [[ULF_EXT:%[a-z0-9]+]] = zext i32 [[ULF]] to i41
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i41 [[SA]], [[ULF_EXT]]
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i41 [[SUM]], 25
+ // SIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i41 [[RESULT]] to i16
+ // UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i40
+ // UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i40 [[EXT_SA]], 24
+ // UNSIGNED-NEXT: [[EXT_ULF:%[a-z0-9]+]] = zext i32 [[ULF]] to i40
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[SA]], [[EXT_ULF]]
+ // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = ashr i40 [[SUM]], 24
+ // UNSIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i40 [[RES]] to i16
+ // CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %sa, align 2
+ sa = sa + ulf;
+
+ // Chained additions of the same signed type should result in the same
+ // semantics width.
+ // CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
+ // CHECK-NEXT: [[B:%[0-9]+]] = load i32, i32* %b, align 4
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[A]], [[B]]
+ // CHECK-NEXT: [[C:%[0-9]+]] = load i32, i32* %c, align 4
+ // CHECK-NEXT: [[SUM2:%[0-9]+]] = add i32 [[SUM]], [[C]]
+ // CHECK-NEXT: [[D:%[0-9]+]] = load i32, i32* %d, align 4
+ // CHECK-NEXT: [[SUM3:%[0-9]+]] = add i32 [[SUM2]], [[D]]
+ // CHECK-NEXT: store i32 [[SUM3]], i32* %a, align 4
+ a = a + b + c + d;
+}
+
+void UnsignedAddition() {
+ // CHECK-LABEL: UnsignedAddition
+ unsigned short _Accum usa;
+ unsigned _Accum ua;
+ unsigned long _Accum ula;
+
+ unsigned short _Fract usf;
+ unsigned _Fract uf;
+ unsigned long _Fract ulf;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[USA2:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[USA]], [[USA2]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
+ usa = usa + usa;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
+ // CHECK-NEXT: [[EXT_USA:%[a-z0-9]+]] = zext i16 [[USA]] to i32
+ // CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[EXT_USA]], 8
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i32 [[USA]], [[UA]]
+ // CHECK-NEXT: store i32 [[SUM]], i32* %ua, align 4
+ ua = usa + ua;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
+ // CHECK-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i16 [[USA]], [[EXT_USF]]
+ // CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
+ usa = usa + usf;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[UF:%[0-9]+]] = load i16, i16* %uf, align 2
+ // CHECK-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i24
+ // CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i24 [[USA_EXT]], 8
+ // CHECK-NEXT: [[UF_EXT:%[a-z0-9]+]] = zext i16 [[UF]] to i24
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i24 [[USA]], [[UF_EXT]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = lshr i24 [[SUM]], 8
+ // CHECK-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
+ // CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %usa, align 2
+ usa = usa + uf;
+}
+
+void IntAddition() {
+ // CHECK-LABEL: IntAddition
+ short _Accum sa;
+ _Accum a;
+ unsigned short _Accum usa;
+ _Sat short _Accum sa_sat;
+ int i;
+ unsigned int ui;
+ long _Fract lf;
+ _Bool b;
+
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
+ // CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i39
+ // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
+ // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i39 [[SA_EXT]], [[I]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
+ // CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
+ sa = sa + i;
+
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
+ // CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i40
+ // CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i40
+ // CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i40 [[UI_EXT]], 7
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i40 [[SA_EXT]], [[UI]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
+ // CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
+ sa = sa + ui;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
+ // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
+ // SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i40
+ // SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[USA_EXT]], [[I]]
+ // SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
+ // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
+ // UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
+ // UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i39 [[USA_EXT]], [[I]]
+ // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
+ // CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
+ usa = usa + i;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
+ // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
+ // SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
+ // SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = add i40 [[USA_EXT]], [[I]]
+ // SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
+ // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
+ // UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i39
+ // UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = add i39 [[USA_EXT]], [[I]]
+ // UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
+ // CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
+ usa = usa + ui;
+
+ // CHECK: [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
+ // CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
+ // CHECK-NEXT: [[LF_EXT:%[a-z0-9]+]] = sext i32 [[LF]] to i64
+ // CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i64
+ // CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i64 [[UI_EXT]], 31
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i64 [[LF_EXT]], [[UI]]
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i64 [[SUM]] to i32
+ // CHECK-NEXT: store i32 [[RES]], i32* %lf, align 4
+ lf = lf + ui;
+
+ // CHECK: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
+ // CHECK-NEXT: [[BOOL:%[0-9]+]] = load i8, i8* %b, align 1
+ // CHECK-NEXT: [[AS_BOOL:%[a-z0-9]+]] = trunc i8 [[BOOL]] to i1
+ // CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = zext i1 [[AS_BOOL]] to i32
+ // CHECK-NEXT: [[ACCUM_EXT:%[a-z0-9]+]] = sext i32 [[ACCUM]] to i47
+ // CHECK-NEXT: [[BOOL:%[a-z0-9]+]] = sext i32 [[BOOL_EXT]] to i47
+ // CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = shl i47 [[BOOL]], 15
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = add i47 [[ACCUM_EXT]], [[BOOL_EXT]]
+ // CHECK-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i47 [[SUM]] to i32
+ // CHECK-NEXT: store i32 [[RESULT]], i32* %a, align 4
+ a = a + b;
+}
+
+void SaturatedAddition() {
+ // CHECK-LABEL: SaturatedAddition
+ short _Accum sa;
+ _Accum a;
+ long _Accum la;
+ unsigned short _Accum usa;
+ unsigned _Accum ua;
+ unsigned long _Accum ula;
+
+ _Sat short _Accum sa_sat;
+ _Sat _Accum a_sat;
+ _Sat long _Accum la_sat;
+ _Sat unsigned short _Accum usa_sat;
+ _Sat unsigned _Accum ua_sat;
+ _Sat unsigned long _Accum ula_sat;
+ _Sat unsigned _Fract uf_sat;
+
+ int i;
+ unsigned int ui;
+
+ // CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
+ // CHECK-NEXT: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.sadd.sat.i16(i16 [[SA]], i16
+ // [[SA_SAT]])
+ // CHECK-NEXT: store i16 [[SUM]], i16* %sa_sat, align 2
+ sa_sat = sa + sa_sat;
+
+ // CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
+ // CHECK-NEXT: [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.uadd.sat.i16(i16 [[USA]], i16 [[USA_SAT]])
+ // SIGNED-NEXT: store i16 [[SUM]], i16* %usa_sat, align 2
+ // UNSIGNED-NEXT: [[USA_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA]] to i15
+ // UNSIGNED-NEXT: [[USA_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA_SAT]] to i15
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.uadd.sat.i15(i15 [[USA_TRUNC]], i15 [[USA_SAT_TRUNC]])
+ // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
+ // UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %usa_sat, align 2
+ usa_sat = usa + usa_sat;
+
+ // CHECK: [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
+ // CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa_sat, align 2
+ // SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i32
+ // SIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[USA_EXT]], 8
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i32 @llvm.uadd.sat.i32(i32 [[UA]], i32 [[USA]])
+ // SIGNED-NEXT: store i32 [[SUM]], i32* %ua_sat, align 4
+ // UNSIGNED-NEXT: [[UA_TRUNC:%[a-z0-9]+]] = trunc i32 [[UA]] to i31
+ // UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i31
+ // UNSIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i31 [[USA_EXT]], 8
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i31 @llvm.uadd.sat.i31(i31 [[UA_TRUNC]], i31 [[USA]])
+ // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i31 [[SUM]] to i32
+ // UNSIGNED-NEXT: store i32 [[SUM_EXT]], i32* %ua_sat, align 4
+ ua_sat = ua + usa_sat;
+
+ // CHECK: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
+ // CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i39
+ // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
+ // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.sadd.sat.i39(i39 [[SA_SAT_EXT]], i39 [[I]])
+ // CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
+ // CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RES]], -32768
+ // CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 -32768, i39 [[RES]]
+ // CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i39 [[RES2]] to i16
+ // CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
+ sa_sat = sa_sat + i;
+
+ // CHECK: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
+ // CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i40
+ // CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
+ // CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 7
+ // CHECK-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.sadd.sat.i40(i40 [[SA_SAT_EXT]], i40 [[I]])
+ // CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 32767
+ // CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 32767, i40 [[SUM]]
+ // CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RES]], -32768
+ // CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 -32768, i40 [[RES]]
+ // CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i40 [[RES2]] to i16
+ // CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
+ sa_sat = sa_sat + ui;
+
+ // CHECK: [[UF_SAT:%[0-9]+]] = load i16, i16* %uf_sat, align 2
+ // CHECK-NEXT: [[UF_SAT2:%[0-9]+]] = load i16, i16* %uf_sat, align 2
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.uadd.sat.i16(i16 [[UF_SAT]], i16 [[UF_SAT2]])
+ // SIGNED-NEXT: store i16 [[SUM]], i16* %uf_sat, align 2
+ // UNSIGNED-NEXT: [[UF_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[UF_SAT]] to i15
+ // UNSIGNED-NEXT: [[UF_SAT_TRUNC2:%[a-z0-9]+]] = trunc i16 [[UF_SAT2]] to i15
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.uadd.sat.i15(i15 [[UF_SAT_TRUNC]], i15 [[UF_SAT_TRUNC2]])
+ // UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
+ // UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %uf_sat, align 2
+ uf_sat = uf_sat + uf_sat;
+
+ // CHECK: [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
+ // CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
+ // SIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i40
+ // SIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i40
+ // SIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i40 [[I_RESIZE]], 8
+ // SIGNED-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.uadd.sat.i40(i40 [[USA_SAT_RESIZE]], i40 [[I_UPSCALE]])
+ // SIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 65535
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 65535, i40 [[SUM]]
+ // SIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RESULT]], 0
+ // SIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 0, i40 [[RESULT]]
+ // SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i40 [[RESULT2]] to i16
+ // UNSIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i39
+ // UNSIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i39
+ // UNSIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i39 [[I_RESIZE]], 7
+ // UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.uadd.sat.i39(i39 [[USA_SAT_RESIZE]], i39 [[I_UPSCALE]])
+ // UNSIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
+ // UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
+ // UNSIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RESULT]], 0
+ // UNSIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 0, i39 [[RESULT]]
+ // UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i39 [[RESULT2]] to i16
+ // CHECK-NEXT: store i16 [[RESULT]], i16* %usa_sat, align 2
+ usa_sat = usa_sat + i;
+}
diff --git a/clang/test/Frontend/fixed_point_conversions.c b/clang/test/Frontend/fixed_point_conversions.c
index 7e98fb1..22cde0e 100644
--- a/clang/test/Frontend/fixed_point_conversions.c
+++ b/clang/test/Frontend/fixed_point_conversions.c
@@ -214,19 +214,17 @@
// Only get overflow checking if signed fract to unsigned accum
sat_ua = sat_sf;
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
- // DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i17
- // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i17 [[FRACT_EXT]], 9
- // DEFAULT-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i17 [[ACCUM]], 0
- // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i17 0, i17 [[ACCUM]]
- // DEFAULT-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i17 [[RESULT]] to i32
- // DEFAULT-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
+ // DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i32
+ // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[FRACT_EXT]], 9
+ // DEFAULT-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i32 [[ACCUM]], 0
+ // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i32 0, i32 [[ACCUM]]
+ // DEFAULT-NEXT: store i32 [[RESULT]], i32* %sat_ua, align 4
// SAME: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
- // SAME-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i16
- // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i16 [[FRACT_EXT]], 8
- // SAME-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i16 [[ACCUM]], 0
- // SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i16 0, i16 [[ACCUM]]
- // SAME-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i16 [[RESULT]] to i32
- // SAME-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
+ // SAME-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i32
+ // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[FRACT_EXT]], 8
+ // SAME-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i32 [[ACCUM]], 0
+ // SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i32 0, i32 [[ACCUM]]
+ // SAME-NEXT: store i32 [[RESULT]], i32* %sat_ua, align 4
}
void TestFixedPointCastBetFractAccum() {