mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-25 14:02:52 +02:00
6ec19288fa
In r271810 ( http://reviews.llvm.org/rL271810 ), I loosened the check above this to work for any Constant rather than ConstantInt. AFAICT, that part makes sense if we can determine that the shrunken/extended constant remained equal. But it doesn't make sense for this later transform where we assume that the constant DID change. This could assert for a ConstantExpr: https://llvm.org/bugs/show_bug.cgi?id=28011 And it could be wrong for a vector as shown in the added regression test. llvm-svn: 271908
270 lines
6.8 KiB
LLVM
270 lines
6.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; 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
|
|
|
|
define i1 @lt_signed_to_large_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_large_unsigned(
|
|
; CHECK-NEXT: [[C1:%.*]] = icmp sgt i8 %SB, -1
|
|
; CHECK-NEXT: ret i1 [[C1]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp ult i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
; PR28011 - https://llvm.org/bugs/show_bug.cgi?id=28011
|
|
; The above transform only applies to scalar integers; it shouldn't be attempted for constant expressions or vectors.
|
|
|
|
@a = common global i32** null
|
|
@b = common global [1 x i32] zeroinitializer
|
|
|
|
define i1 @PR28011(i16 %a) {
|
|
; CHECK-LABEL: @PR28011(
|
|
; CHECK-NEXT: [[CONV:%.*]] = sext i16 %a to i32
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[CONV]], or (i32 zext (i1 icmp ne (i32*** bitcast ([1 x i32]* @b to i32***), i32*** @a) to i32), i32 1)
|
|
; CHECK-NEXT: ret i1 [[CMP]]
|
|
;
|
|
%conv = sext i16 %a to i32
|
|
%cmp = icmp ne i32 %conv, or (i32 zext (i1 icmp ne (i32*** bitcast ([1 x i32]* @b to i32***), i32*** @a) to i32), i32 1)
|
|
ret i1 %cmp
|
|
}
|
|
|
|
define <2 x i1> @lt_signed_to_large_unsigned_vec(<2 x i8> %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_large_unsigned_vec(
|
|
; CHECK-NEXT: [[Y:%.*]] = sext <2 x i8> %SB to <2 x i32>
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ult <2 x i32> [[Y]], <i32 1024, i32 2>
|
|
; CHECK-NEXT: ret <2 x i1> [[C]]
|
|
;
|
|
%Y = sext <2 x i8> %SB to <2 x i32>
|
|
%C = icmp ult <2 x i32> %Y, <i32 1024, i32 2>
|
|
ret <2 x i1> %C
|
|
}
|
|
|
|
define i1 @lt_signed_to_large_signed(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_large_signed(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_signed_to_large_negative(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_large_negative(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, -1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_signed_to_small_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_small_unsigned(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp ult i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_signed_to_small_signed(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_small_signed(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
define i1 @lt_signed_to_small_negative(i8 %SB) {
|
|
; CHECK-LABEL: @lt_signed_to_small_negative(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, -17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, -17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_large_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_large_unsigned(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp ult i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_large_signed(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_large_signed(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_large_negative(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_large_negative(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, -1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_small_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_small_unsigned(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp ult i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_small_signed(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_small_signed(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @lt_unsigned_to_small_negative(i8 %SB) {
|
|
; CHECK-LABEL: @lt_unsigned_to_small_negative(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp slt i32 %Y, -17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_large_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_large_unsigned(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, 0
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp ugt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_large_signed(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_large_signed(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_large_negative(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_large_negative(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, -1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_small_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_small_unsigned(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp ugt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_small_signed(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_small_signed(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_signed_to_small_negative(i8 %SB) {
|
|
; CHECK-LABEL: @gt_signed_to_small_negative(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 %SB, -17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = sext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, -17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_large_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_large_unsigned(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp ugt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_large_signed(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_large_signed(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, 1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_large_negative(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_large_negative(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, -1024
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_small_unsigned(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_small_unsigned(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp ugt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_small_signed(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_small_signed(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, 17
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @gt_unsigned_to_small_negative(i8 %SB) {
|
|
; CHECK-LABEL: @gt_unsigned_to_small_negative(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%Y = zext i8 %SB to i32
|
|
%C = icmp sgt i32 %Y, -17
|
|
ret i1 %C
|
|
}
|
|
|