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[InstCombine] Add additional freeze tests (NFC)

This commit is contained in:
Nikita Popov 2022-05-10 17:43:27 +02:00
parent 88f04bdbd8
commit c813516ef8
1 changed files with 106 additions and 0 deletions
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106
llvm/test/Transforms/InstCombine/freeze.ll
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@ -160,6 +160,7 @@ define void @freeze_dominated_uses_test1(i32 %v) {
define void @freeze_dominated_uses_test2(i32 %v) {
; CHECK-LABEL: @freeze_dominated_uses_test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @use_i32(i32 0)
; CHECK-NEXT: call void @use_i32(i32 [[V:%.*]])
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[V]], 0
; CHECK-NEXT: br i1 [[COND]], label [[BB0:%.*]], label [[BB1:%.*]]
@ -175,6 +176,7 @@ define void @freeze_dominated_uses_test2(i32 %v) {
; CHECK-NEXT: ret void
;
entry:
call void @use_i32(i32 0)
call void @use_i32(i32 %v)
%cond = icmp eq i32 %v, 0
br i1 %cond, label %bb0, label %bb1
@ -228,6 +230,110 @@ end:
ret void
}
declare i32 @get_i32()
define i32 @freeze_use_in_different_branches(i1 %c, i32 %x) {
; CHECK-LABEL: @freeze_use_in_different_branches(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK: if:
; CHECK-NEXT: call void @use_i32(i32 [[X:%.*]])
; CHECK-NEXT: ret i32 0
; CHECK: else:
; CHECK-NEXT: call void @use_i32(i32 [[X]])
; CHECK-NEXT: [[FR:%.*]] = freeze i32 [[X]]
; CHECK-NEXT: call void @use_i32(i32 [[FR]])
; CHECK-NEXT: ret i32 1
;
entry:
br i1 %c, label %if, label %else
if:
call void @use_i32(i32 %x)
ret i32 0
else:
call void @use_i32(i32 %x)
%fr = freeze i32 %x
call void @use_i32(i32 %fr)
ret i32 1
}
define i32 @freeze_phi_use(i1 %c, i32 %x) {
; CHECK-LABEL: @freeze_phi_use(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ [[X:%.*]], [[IF]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[FR:%.*]] = freeze i32 [[X]]
; CHECK-NEXT: call void @use_i32(i32 [[FR]])
; CHECK-NEXT: ret i32 [[PHI]]
;
entry:
br i1 %c, label %if, label %join
if:
br label %join
join:
%phi = phi i32 [ %x, %if ], [ 0, %entry ]
%fr = freeze i32 %x
call void @use_i32(i32 %fr)
ret i32 %phi
}
define i32 @freeze_invoke_phi(i1 %c) personality i8* undef {
; CHECK-LABEL: @freeze_invoke_phi(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[RET:%.*]] = invoke i32 @get_i32()
; CHECK-NEXT: to label [[INVOKE_CONT:%.*]] unwind label [[INVOKE_UNWIND:%.*]]
; CHECK: invoke.cont:
; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ [[RET]], [[ENTRY:%.*]] ], [ 0, [[INVOKE_CONT]] ]
; CHECK-NEXT: [[FR:%.*]] = freeze i32 [[RET]]
; CHECK-NEXT: call void @use_i32(i32 [[FR]])
; CHECK-NEXT: call void @use_i32(i32 [[PHI]])
; CHECK-NEXT: br label [[INVOKE_CONT]]
; CHECK: invoke.unwind:
; CHECK-NEXT: [[TMP0:%.*]] = landingpad i8
; CHECK-NEXT: cleanup
; CHECK-NEXT: unreachable
;
entry:
%ret = invoke i32 @get_i32()
to label %invoke.cont unwind label %invoke.unwind
invoke.cont:
%phi = phi i32 [ %ret, %entry ], [ 0, %invoke.cont ]
%fr = freeze i32 %ret
call void @use_i32(i32 %fr)
call void @use_i32(i32 %phi)
br label %invoke.cont
invoke.unwind:
landingpad i8 cleanup
unreachable
}
define i1 @combine_and_after_freezing_uses(i32 %x) {
; CHECK-LABEL: @combine_and_after_freezing_uses(
; CHECK-NEXT: [[AND1:%.*]] = and i32 [[X:%.*]], 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[AND1]], 0
; CHECK-NEXT: [[X_FR:%.*]] = freeze i32 [[X]]
; CHECK-NEXT: [[AND2:%.*]] = and i32 [[X_FR]], 11
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[AND2]], 11
; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP1]], [[CMP2]]
; CHECK-NEXT: ret i1 [[AND]]
;
%and1 = and i32 %x, 4
%cmp1 = icmp ne i32 %and1, 0
%x.fr = freeze i32 %x
%and2 = and i32 %x.fr, 11
%cmp2 = icmp eq i32 %and2, 11
%and = and i1 %cmp1, %cmp2
ret i1 %and
}
define i32 @propagate_drop_flags_add(i32 %arg) {
; CHECK-LABEL: @propagate_drop_flags_add(