xref: /aosp_15_r20/external/llvm/test/Transforms/InstCombine/2008-11-08-FCmp.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -instcombine -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker; PR3021
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Worker; When inst combining an FCMP with the LHS coming from a uitofp instruction, we
5*9880d681SAndroid Build Coastguard Worker; can't lower it to signed ICMP instructions.
6*9880d681SAndroid Build Coastguard Worker
7*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1(
8*9880d681SAndroid Build Coastguard Workerdefine i1 @test1(i32 %val) {
9*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
10*9880d681SAndroid Build Coastguard Worker  %2 = fcmp ole double %1, 0.000000e+00
11*9880d681SAndroid Build Coastguard Worker; CHECK: icmp eq i32 %val, 0
12*9880d681SAndroid Build Coastguard Worker  ret i1 %2
13*9880d681SAndroid Build Coastguard Worker}
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test2(
16*9880d681SAndroid Build Coastguard Workerdefine i1 @test2(i32 %val) {
17*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
18*9880d681SAndroid Build Coastguard Worker  %2 = fcmp olt double %1, 0.000000e+00
19*9880d681SAndroid Build Coastguard Worker  ret i1 %2
20*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 false
21*9880d681SAndroid Build Coastguard Worker}
22*9880d681SAndroid Build Coastguard Worker
23*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test3(
24*9880d681SAndroid Build Coastguard Workerdefine i1 @test3(i32 %val) {
25*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
26*9880d681SAndroid Build Coastguard Worker  %2 = fcmp oge double %1, 0.000000e+00
27*9880d681SAndroid Build Coastguard Worker  ret i1 %2
28*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true
29*9880d681SAndroid Build Coastguard Worker}
30*9880d681SAndroid Build Coastguard Worker
31*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test4(
32*9880d681SAndroid Build Coastguard Workerdefine i1 @test4(i32 %val) {
33*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
34*9880d681SAndroid Build Coastguard Worker  %2 = fcmp ogt double %1, 0.000000e+00
35*9880d681SAndroid Build Coastguard Worker; CHECK: icmp ne i32 %val, 0
36*9880d681SAndroid Build Coastguard Worker  ret i1 %2
37*9880d681SAndroid Build Coastguard Worker}
38*9880d681SAndroid Build Coastguard Worker
39*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test5(
40*9880d681SAndroid Build Coastguard Workerdefine i1 @test5(i32 %val) {
41*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
42*9880d681SAndroid Build Coastguard Worker  %2 = fcmp ogt double %1, -4.400000e+00
43*9880d681SAndroid Build Coastguard Worker  ret i1 %2
44*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 true
45*9880d681SAndroid Build Coastguard Worker}
46*9880d681SAndroid Build Coastguard Worker
47*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test6(
48*9880d681SAndroid Build Coastguard Workerdefine i1 @test6(i32 %val) {
49*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
50*9880d681SAndroid Build Coastguard Worker  %2 = fcmp olt double %1, -4.400000e+00
51*9880d681SAndroid Build Coastguard Worker  ret i1 %2
52*9880d681SAndroid Build Coastguard Worker; CHECK: ret i1 false
53*9880d681SAndroid Build Coastguard Worker}
54*9880d681SAndroid Build Coastguard Worker
55*9880d681SAndroid Build Coastguard Worker; Check that optimizing unsigned >= comparisons correctly distinguishes
56*9880d681SAndroid Build Coastguard Worker; positive and negative constants.  <rdar://problem/12029145>
57*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test7(
58*9880d681SAndroid Build Coastguard Workerdefine i1 @test7(i32 %val) {
59*9880d681SAndroid Build Coastguard Worker  %1 = uitofp i32 %val to double
60*9880d681SAndroid Build Coastguard Worker  %2 = fcmp oge double %1, 3.200000e+00
61*9880d681SAndroid Build Coastguard Worker  ret i1 %2
62*9880d681SAndroid Build Coastguard Worker; CHECK: icmp ugt i32 %val, 3
63*9880d681SAndroid Build Coastguard Worker}
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