; 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 | llvm-dis | \
-; RUN: notcast .*int
+; 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
}
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
}
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
+}
+
+define i1 @lt_signed_to_small_unsigned(i8 %SB) {
+ %Y = sext i8 %SB to i32
+ %C = icmp ult i32 %Y, 17
+ ret i1 %C
+; CHECK: %C = icmp ult i8 %SB, 17
+; CHECK: ret i1 %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
}
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
}
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
}
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
}
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
}
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
+}
+
+define i1 @lt_unsigned_to_small_signed(i8 %SB) {
+ %Y = zext i8 %SB to i32
+ %C = icmp slt i32 %Y, 17
+ ret i1 %C
+; CHECK: %C = icmp ult i8 %SB, 17
+; CHECK: ret i1 %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
}
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
}
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
}
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
}
+
+define i1 @gt_signed_to_small_unsigned(i8 %SB) {
+ %Y = sext i8 %SB to i32
+ %C = icmp ugt i32 %Y, 17
+ ret i1 %C
+; CHECK: %C = icmp ugt i8 %SB, 17
+; CHECK: ret i1 %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
}
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
}
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
}
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
}
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
}
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
+}
+
+define i1 @gt_unsigned_to_small_signed(i8 %SB) {
+ %Y = zext i8 %SB to i32
+ %C = icmp sgt i32 %Y, 17
+ ret i1 %C
+; CHECK: %C = icmp ugt i8 %SB, 17
+; CHECK: ret i1 %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
}