forked from OSchip/llvm-project
128 lines
4.7 KiB
LLVM
128 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; Tests to verify proper functioning of the icmp folding implemented in
|
|
; InstCombiner::foldICmpBitCastConstant
|
|
; Specifically, folding:
|
|
; icmp <pred> iN X, C
|
|
; where X = bitcast <M x iK> (shufflevector <M x iK> %vec, undef, SC)) to iN
|
|
; and C is a splat of a K-bit pattern
|
|
; and SC is a constant vector = <C', C', C', ..., C'>
|
|
; Into:
|
|
; %E = extractelement <M x iK> %vec, i32 C'
|
|
; icmp <pred> iK %E, trunc(C)
|
|
|
|
define i1 @test_i1_0(i1 %val) {
|
|
; CHECK-LABEL: @test_i1_0(
|
|
; CHECK-NEXT: [[COND:%.*]] = xor i1 [[VAL:%.*]], true
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i1> undef, i1 %val, i32 0
|
|
%vec = shufflevector <4 x i1> %insvec, <4 x i1> undef, <4 x i32> zeroinitializer
|
|
%cast = bitcast <4 x i1> %vec to i4
|
|
%cond = icmp eq i4 %cast, 0
|
|
ret i1 %cond
|
|
}
|
|
|
|
define i1 @test_i1_0_2(i1 %val) {
|
|
; CHECK-LABEL: @test_i1_0_2(
|
|
; CHECK-NEXT: [[COND:%.*]] = xor i1 [[VAL:%.*]], true
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i1> undef, i1 %val, i32 2
|
|
%vec = shufflevector <4 x i1> %insvec, <4 x i1> undef, <4 x i32> <i32 2, i32 2, i32 2, i32 2>
|
|
%cast = bitcast <4 x i1> %vec to i4
|
|
%cond = icmp eq i4 %cast, 0
|
|
ret i1 %cond
|
|
}
|
|
|
|
define i1 @test_i1_m1(i1 %val) {
|
|
; CHECK-LABEL: @test_i1_m1(
|
|
; CHECK-NEXT: ret i1 [[VAL:%.*]]
|
|
;
|
|
%insvec = insertelement <4 x i1> undef, i1 %val, i32 0
|
|
%vec = shufflevector <4 x i1> %insvec, <4 x i1> undef, <4 x i32> zeroinitializer
|
|
%cast = bitcast <4 x i1> %vec to i4
|
|
%cond = icmp eq i4 %cast, -1
|
|
ret i1 %cond
|
|
}
|
|
|
|
define i1 @test_i8_pattern(i8 %val) {
|
|
; CHECK-LABEL: @test_i8_pattern(
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i8 [[VAL:%.*]], 72
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i8> undef, i8 %val, i32 0
|
|
%vec = shufflevector <4 x i8> %insvec, <4 x i8> undef, <4 x i32> zeroinitializer
|
|
%cast = bitcast <4 x i8> %vec to i32
|
|
%cond = icmp eq i32 %cast, 1212696648
|
|
ret i1 %cond
|
|
}
|
|
|
|
define i1 @test_i8_pattern_2(i8 %val) {
|
|
; CHECK-LABEL: @test_i8_pattern_2(
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i8 [[VAL:%.*]], 72
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i8> undef, i8 %val, i32 2
|
|
%vec = shufflevector <4 x i8> %insvec, <4 x i8> undef, <4 x i32> <i32 2, i32 2, i32 2, i32 2>
|
|
%cast = bitcast <4 x i8> %vec to i32
|
|
%cond = icmp eq i32 %cast, 1212696648
|
|
ret i1 %cond
|
|
}
|
|
|
|
; Make sure we don't try to fold if the shufflemask has differing element values
|
|
define i1 @test_i8_pattern_3(<4 x i8> %invec) {
|
|
; CHECK-LABEL: @test_i8_pattern_3(
|
|
; CHECK-NEXT: [[VEC:%.*]] = shufflevector <4 x i8> [[INVEC:%.*]], <4 x i8> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
|
|
; CHECK-NEXT: [[CAST:%.*]] = bitcast <4 x i8> [[VEC]] to i32
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[CAST]], 1212696648
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%vec = shufflevector <4 x i8> %invec, <4 x i8> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
|
|
%cast = bitcast <4 x i8> %vec to i32
|
|
%cond = icmp eq i32 %cast, 1212696648
|
|
ret i1 %cond
|
|
}
|
|
|
|
; Make sure we don't try to fold if the compared-to constant isn't a splatted value
|
|
define i1 @test_i8_nopattern(i8 %val) {
|
|
; CHECK-LABEL: @test_i8_nopattern(
|
|
; CHECK-NEXT: [[INSVEC:%.*]] = insertelement <4 x i8> undef, i8 [[VAL:%.*]], i32 0
|
|
; CHECK-NEXT: [[VEC:%.*]] = shufflevector <4 x i8> [[INSVEC]], <4 x i8> undef, <4 x i32> zeroinitializer
|
|
; CHECK-NEXT: [[CAST:%.*]] = bitcast <4 x i8> [[VEC]] to i32
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[CAST]], 1212696647
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i8> undef, i8 %val, i32 0
|
|
%vec = shufflevector <4 x i8> %insvec, <4 x i8> undef, <4 x i32> zeroinitializer
|
|
%cast = bitcast <4 x i8> %vec to i32
|
|
%cond = icmp eq i32 %cast, 1212696647
|
|
ret i1 %cond
|
|
}
|
|
|
|
; Verify that we fold more than just the eq predicate
|
|
define i1 @test_i8_ult_pattern(i8 %val) {
|
|
; CHECK-LABEL: @test_i8_ult_pattern(
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp ult i8 [[VAL:%.*]], 72
|
|
; CHECK-NEXT: ret i1 [[COND]]
|
|
;
|
|
%insvec = insertelement <4 x i8> undef, i8 %val, i32 0
|
|
%vec = shufflevector <4 x i8> %insvec, <4 x i8> undef, <4 x i32> zeroinitializer
|
|
%cast = bitcast <4 x i8> %vec to i32
|
|
%cond = icmp ult i32 %cast, 1212696648
|
|
ret i1 %cond
|
|
}
|
|
|
|
define i1 @extending_shuffle_with_weird_types(<2 x i9> %v) {
|
|
; CHECK-LABEL: @extending_shuffle_with_weird_types(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = extractelement <2 x i9> [[V:%.*]], i32 0
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i9 [[TMP1]], 1
|
|
; CHECK-NEXT: ret i1 [[CMP]]
|
|
;
|
|
%splat = shufflevector <2 x i9> %v, <2 x i9> undef, <3 x i32> zeroinitializer
|
|
%cast = bitcast <3 x i9> %splat to i27
|
|
%cmp = icmp slt i27 %cast, 262657 ; 0x040201
|
|
ret i1 %cmp
|
|
}
|