; This test case tests the InstructionCombining optimization that
; reduces things like:
-; %Y = cast sbyte %X to uint
-; %C = setlt uint %Y, 1024
+; %Y = sext i8 %X to i32
+; %C = icmp ult i32 %Y, 1024
; to
-; %C = bool true
+; %C = i1 true
; It includes test cases for different constant values, signedness of the
; cast operands, and types of setCC operators. In all cases, the cast should
; be eliminated. In many cases the setCC is also eliminated based on the
; constant value and the range of the casted value.
;
-; RUN: llvm-as %s -o - | opt -instcombine -o - | llvm-dis -o - | grep -v cast
-
-implementation ; Functions:
-
-;
-bool %lt_signed_to_large_unsigned(sbyte %SB) {
- %Y = cast sbyte %SB to uint ; <uint> [#uses=1]
- %C = setlt uint %Y, 1024 ; <bool> [#uses=1]
- ret bool %C
-}
-
-bool %lt_signed_to_large_signed(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setlt int %Y, 1024
- ret bool %C
-}
-
-bool %lt_signed_to_large_negative(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setlt int %Y, -1024
- ret bool %C
+; RUN: opt < %s -instcombine -S | FileCheck %s
+; END.
+define i1 @lt_signed_to_large_unsigned(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ult i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C1 = icmp sgt i8 %SB, -1
+; CHECK: ret i1 %C1
}
-bool %lt_signed_to_small_unsigned(sbyte %SB) {
- %Y = cast sbyte %SB to uint ; <uint> [#uses=1]
- %C = setlt uint %Y, 17 ; <bool> [#uses=1]
- ret bool %C
+define i1 @lt_signed_to_large_signed(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %lt_signed_to_small_signed(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setlt int %Y, 17
- ret bool %C
+define i1 @lt_signed_to_large_negative(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, -1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %lt_signed_to_small_negative(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setlt int %Y, -17
- ret bool %C
+define i1 @lt_signed_to_small_signed(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, 17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp slt i8 %SB, 17
+; CHECK: ret i1 %C
}
-
-bool %lt_unsigned_to_large_unsigned(ubyte %SB) {
- %Y = cast ubyte %SB to uint ; <uint> [#uses=1]
- %C = setlt uint %Y, 1024 ; <bool> [#uses=1]
- ret bool %C
+define i1 @lt_signed_to_small_negative(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, -17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp slt i8 %SB, -17
+; CHECK: ret i1 %C
}
-bool %lt_unsigned_to_large_signed(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setlt int %Y, 1024
- ret bool %C
+define i1 @lt_unsigned_to_large_unsigned(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ult i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %lt_unsigned_to_large_negative(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setlt int %Y, -1024
- ret bool %C
+define i1 @lt_unsigned_to_large_signed(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %lt_unsigned_to_small_unsigned(ubyte %SB) {
- %Y = cast ubyte %SB to uint ; <uint> [#uses=1]
- %C = setlt uint %Y, 17 ; <bool> [#uses=1]
- ret bool %C
+define i1 @lt_unsigned_to_large_negative(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, -1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %lt_unsigned_to_small_signed(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setlt int %Y, 17
- ret bool %C
+define i1 @lt_unsigned_to_small_unsigned(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ult i32 %Y, 17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp ult i8 %SB, 17
+; CHECK: ret i1 %C
}
-bool %lt_unsigned_to_small_negative(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setlt int %Y, -17
- ret bool %C
+define i1 @lt_unsigned_to_small_negative(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp slt i32 %Y, -17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %gt_signed_to_large_unsigned(sbyte %SB) {
- %Y = cast sbyte %SB to uint ; <uint> [#uses=1]
- %C = setgt uint %Y, 1024 ; <bool> [#uses=1]
- ret bool %C
+define i1 @gt_signed_to_large_unsigned(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ugt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp slt i8 %SB, 0
+; CHECK: ret i1 %C
}
-bool %gt_signed_to_large_signed(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setgt int %Y, 1024
- ret bool %C
+define i1 @gt_signed_to_large_signed(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %gt_signed_to_large_negative(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setgt int %Y, -1024
- ret bool %C
+define i1 @gt_signed_to_large_negative(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, -1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %gt_signed_to_small_unsigned(sbyte %SB) {
- %Y = cast sbyte %SB to uint ; <uint> [#uses=1]
- %C = setgt uint %Y, 17 ; <bool> [#uses=1]
- ret bool %C
+define i1 @gt_signed_to_small_signed(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, 17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp sgt i8 %SB, 17
+; CHECK: ret i1 %C
}
-bool %gt_signed_to_small_signed(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setgt int %Y, 17
- ret bool %C
+define i1 @gt_signed_to_small_negative(i8 %SB) {
+ %Y = sext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, -17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp sgt i8 %SB, -17
+; CHECK: ret i1 %C
}
-bool %gt_signed_to_small_negative(sbyte %SB) {
- %Y = cast sbyte %SB to int
- %C = setgt int %Y, -17
- ret bool %C
+define i1 @gt_unsigned_to_large_unsigned(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ugt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %gt_unsigned_to_large_unsigned(ubyte %SB) {
- %Y = cast ubyte %SB to uint ; <uint> [#uses=1]
- %C = setgt uint %Y, 1024 ; <bool> [#uses=1]
- ret bool %C
+define i1 @gt_unsigned_to_large_signed(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, 1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 false
}
-bool %gt_unsigned_to_large_signed(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setgt int %Y, 1024
- ret bool %C
+define i1 @gt_unsigned_to_large_negative(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, -1024 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %gt_unsigned_to_large_negative(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setgt int %Y, -1024
- ret bool %C
+define i1 @gt_unsigned_to_small_unsigned(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp ugt i32 %Y, 17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: %C = icmp ugt i8 %SB, 17
+; CHECK: ret i1 %C
}
-bool %gt_unsigned_to_small_unsigned(ubyte %SB) {
- %Y = cast ubyte %SB to uint ; <uint> [#uses=1]
- %C = setgt uint %Y, 17 ; <bool> [#uses=1]
- ret bool %C
+define i1 @gt_unsigned_to_small_negative(i8 %SB) {
+ %Y = zext i8 %SB to i32 ; <i32> [#uses=1]
+ %C = icmp sgt i32 %Y, -17 ; <i1> [#uses=1]
+ ret i1 %C
+; CHECK: ret i1 true
}
-bool %gt_unsigned_to_small_signed(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setgt int %Y, 17
- ret bool %C
-}
-
-bool %gt_unsigned_to_small_negative(ubyte %SB) {
- %Y = cast ubyte %SB to int
- %C = setgt int %Y, -17
- ret bool %C
-}
projects / oota-llvm.git / blobdiff