mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-24 20:29:53 +00:00
e7291efa87
This transforms
%a = shl nuw %x, c1
%b = icmp {ugt|ule} %a, c0
into
%b = icmp {ugt|ule} %x, (c0 >> c1)
z3:
(declare-const x (_ BitVec 64))
(declare-const c0 (_ BitVec 64))
(declare-const c1 (_ BitVec 64))
(push)
(assert (= x (bvlshr (bvshl x c1) c1))) ; nuw
(assert (not (= (bvugt (bvshl x c1) c0)
(bvugt x
(bvlshr c0 c1)))))
(check-sat)
(get-model)
(pop)
(push)
(assert (= x (bvlshr (bvshl x c1) c1))) ; nuw
(assert (not (= (bvule (bvshl x c1) c0)
(bvule x
(bvlshr c0 c1)))))
(check-sat)
(get-model)
(pop)
Patch by bryant!
Differential Revision: https://reviews.llvm.org/D25913
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285729 91177308-0d34-0410-b5e6-96231b3b80d8
93 lines
2.5 KiB
LLVM
93 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -instcombine -S | FileCheck %s
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define i1 @icmp_ugt_32(i64) {
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; CHECK-LABEL: @icmp_ugt_32(
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; CHECK-NEXT: [[D:%.*]] = icmp ne i64 %0, 0
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; CHECK-NEXT: ret i1 [[D]]
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;
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%c = shl nuw i64 %0, 32
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%d = icmp ugt i64 %c, 4294967295
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ret i1 %d
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}
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define i1 @icmp_ule_64(i128) {
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; CHECK-LABEL: @icmp_ule_64(
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; CHECK-NEXT: [[D:%.*]] = icmp eq i128 %0, 0
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; CHECK-NEXT: ret i1 [[D]]
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;
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%c = shl nuw i128 %0, 64
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%d = icmp ule i128 %c, 18446744073709551615
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ret i1 %d
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}
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define i1 @icmp_ugt_16(i64) {
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; CHECK-LABEL: @icmp_ugt_16(
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; CHECK-NEXT: [[D:%.*]] = icmp ugt i64 %0, 15
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; CHECK-NEXT: ret i1 [[D]]
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;
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%c = shl nuw i64 %0, 16
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%d = icmp ugt i64 %c, 1048575 ; 0x0f_ffff
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ret i1 %d
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}
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define <2 x i1> @icmp_ule_16x2(<2 x i64>) {
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; CHECK-LABEL: @icmp_ule_16x2(
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; CHECK-NEXT: [[D:%.*]] = icmp eq <2 x i64> %0, zeroinitializer
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; CHECK-NEXT: ret <2 x i1> [[D]]
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;
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%c = shl nuw <2 x i64> %0, <i64 16, i64 16>
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%d = icmp ule <2 x i64> %c, <i64 65535, i64 65535>
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ret <2 x i1> %d
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}
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define <2 x i1> @icmp_ule_16x2_nonzero(<2 x i64>) {
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; CHECK-LABEL: @icmp_ule_16x2_nonzero(
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; CHECK-NEXT: [[D:%.*]] = icmp ult <2 x i64> %0, <i64 4, i64 4>
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; CHECK-NEXT: ret <2 x i1> [[D]]
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;
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%c = shl nuw <2 x i64> %0, <i64 16, i64 16>
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%d = icmp ule <2 x i64> %c, <i64 196608, i64 196608> ; 0x03_0000
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ret <2 x i1> %d
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}
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define <2 x i1> @icmp_ule_12x2(<2 x i64>) {
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; CHECK-LABEL: @icmp_ule_12x2(
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; CHECK-NEXT: [[D:%.*]] = icmp ult <2 x i64> %0, <i64 4, i64 4>
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; CHECK-NEXT: ret <2 x i1> [[D]]
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;
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%c = shl nuw <2 x i64> %0, <i64 12, i64 12>
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%d = icmp ule <2 x i64> %c, <i64 12288, i64 12288> ; 0x3000
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ret <2 x i1> %d
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}
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define i1 @icmp_ult_8(i64) {
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; CHECK-LABEL: @icmp_ult_8(
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; CHECK-NEXT: [[D:%.*]] = icmp ult i64 %0, 16
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; CHECK-NEXT: ret i1 [[D]]
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;
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%c = shl nuw i64 %0, 8
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%d = icmp ult i64 %c, 4095 ; 0x0fff
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ret i1 %d
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}
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define <2 x i1> @icmp_uge_8x2(<2 x i16>) {
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; CHECK-LABEL: @icmp_uge_8x2(
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; CHECK-NEXT: [[D:%.*]] = icmp ugt <2 x i16> %0, <i16 15, i16 15>
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; CHECK-NEXT: ret <2 x i1> [[D]]
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;
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%c = shl nuw <2 x i16> %0, <i16 8, i16 8>
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%d = icmp uge <2 x i16> %c, <i16 4095, i16 4095>
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ret <2 x i1> %d
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}
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define <2 x i1> @icmp_ugt_16x2(<2 x i32>) {
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; CHECK-LABEL: @icmp_ugt_16x2(
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; CHECK-NEXT: [[D:%.*]] = icmp ugt <2 x i32> %0, <i32 15, i32 15>
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; CHECK-NEXT: ret <2 x i1> [[D]]
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;
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%c = shl nuw <2 x i32> %0, <i32 16, i32 16>
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%d = icmp ugt <2 x i32> %c, <i32 1048575, i32 1048575>
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ret <2 x i1> %d
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}
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