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; This test case tests the InstructionCombining optimization that
; reduces things like:
; %Y = sext i8 %X to i32
; %C = icmp ult i32 %Y, 1024
; to
; %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: 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
}
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