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| ; RUN: opt -functionattrs -enable-nonnull-arg-prop -attributor -attributor-manifest-internal -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=8 -S < %s | FileCheck %s
;
; This is an evolved example to stress test SCC parameter attribute propagation.
; The SCC in this test is made up of the following six function, three of which
; are internal and three externally visible:
;
; static int *internal_ret0_nw(int *n0, int *w0);
; static int *internal_ret1_rw(int *r0, int *w0);
; static int *internal_ret1_rrw(int *r0, int *r1, int *w0);
; int *external_ret2_nrw(int *n0, int *r0, int *w0);
; int *external_sink_ret2_nrw(int *n0, int *r0, int *w0);
; int *external_source_ret2_nrw(int *n0, int *r0, int *w0);
;
; The top four functions call each other while the "sink" function will not
; call anything and the "source" function will not be called in this module.
; The names of the functions define the returned parameter (X for "_retX_"),
; as well as how the parameters are (transitively) used (n = readnone,
; r = readonly, w = writeonly).
;
; What we should see is something along the lines of:
; 1 - Number of functions marked as norecurse
; 6 - Number of functions marked argmemonly
; 6 - Number of functions marked as nounwind
; 16 - Number of arguments marked nocapture
; 4 - Number of arguments marked readnone
; 6 - Number of arguments marked writeonly
; 6 - Number of arguments marked readonly
; 6 - Number of arguments marked returned
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-NEXT: define i32* @external_ret2_nrw(i32* %n0, i32* %r0, i32* returned %w0)
define i32* @external_ret2_nrw(i32* %n0, i32* %r0, i32* %w0) {
entry:
%call = call i32* @internal_ret0_nw(i32* %n0, i32* %w0)
%call1 = call i32* @internal_ret1_rrw(i32* %r0, i32* %r0, i32* %w0)
%call2 = call i32* @external_sink_ret2_nrw(i32* %n0, i32* %r0, i32* %w0)
%call3 = call i32* @internal_ret1_rw(i32* %r0, i32* %w0)
ret i32* %call3
}
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-NEXT: define internal i32* @internal_ret0_nw(i32* returned %n0, i32* %w0)
define internal i32* @internal_ret0_nw(i32* %n0, i32* %w0) {
entry:
%r0 = alloca i32, align 4
%r1 = alloca i32, align 4
%tobool = icmp ne i32* %n0, null
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
br label %return
if.end: ; preds = %entry
store i32 3, i32* %r0, align 4
store i32 5, i32* %r1, align 4
store i32 1, i32* %w0, align 4
%call = call i32* @internal_ret1_rrw(i32* %r0, i32* %r1, i32* %w0)
%call1 = call i32* @external_ret2_nrw(i32* %n0, i32* %r0, i32* %w0)
%call2 = call i32* @external_ret2_nrw(i32* %n0, i32* %r1, i32* %w0)
%call3 = call i32* @external_sink_ret2_nrw(i32* %n0, i32* %r0, i32* %w0)
%call4 = call i32* @external_sink_ret2_nrw(i32* %n0, i32* %r1, i32* %w0)
%call5 = call i32* @internal_ret0_nw(i32* %n0, i32* %w0)
br label %return
return: ; preds = %if.end, %if.then
%retval.0 = phi i32* [ %call5, %if.end ], [ %n0, %if.then ]
ret i32* %retval.0
}
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-NEXT: define internal i32* @internal_ret1_rrw(i32* nonnull dereferenceable(4) %r0, i32* returned %r1, i32* %w0)
define internal i32* @internal_ret1_rrw(i32* %r0, i32* %r1, i32* %w0) {
entry:
%0 = load i32, i32* %r0, align 4
%tobool = icmp ne i32 %0, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
br label %return
if.end: ; preds = %entry
%call = call i32* @internal_ret1_rw(i32* %r0, i32* %w0)
%1 = load i32, i32* %r0, align 4
%2 = load i32, i32* %r1, align 4
%add = add nsw i32 %1, %2
store i32 %add, i32* %w0, align 4
%call1 = call i32* @internal_ret1_rw(i32* %r1, i32* %w0)
%call2 = call i32* @internal_ret0_nw(i32* %r0, i32* %w0)
%call3 = call i32* @internal_ret0_nw(i32* %w0, i32* %w0)
%call4 = call i32* @external_ret2_nrw(i32* %r0, i32* %r1, i32* %w0)
%call5 = call i32* @external_ret2_nrw(i32* %r1, i32* %r0, i32* %w0)
%call6 = call i32* @external_sink_ret2_nrw(i32* %r0, i32* %r1, i32* %w0)
%call7 = call i32* @external_sink_ret2_nrw(i32* %r1, i32* %r0, i32* %w0)
%call8 = call i32* @internal_ret0_nw(i32* %r1, i32* %w0)
br label %return
return: ; preds = %if.end, %if.then
%retval.0 = phi i32* [ %call8, %if.end ], [ %r1, %if.then ]
ret i32* %retval.0
}
; CHECK: Function Attrs: nofree norecurse nosync nounwind
; CHECK-NEXT: define i32* @external_sink_ret2_nrw(i32* readnone %n0, i32* nocapture readonly %r0, i32* returned writeonly "no-capture-maybe-returned" %w0)
define i32* @external_sink_ret2_nrw(i32* %n0, i32* %r0, i32* %w0) {
entry:
%tobool = icmp ne i32* %n0, null
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
br label %return
if.end: ; preds = %entry
%0 = load i32, i32* %r0, align 4
store i32 %0, i32* %w0, align 4
br label %return
return: ; preds = %if.end, %if.then
ret i32* %w0
}
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-NEXT: define internal i32* @internal_ret1_rw(i32* nonnull dereferenceable(4) %r0, i32* returned %w0)
define internal i32* @internal_ret1_rw(i32* %r0, i32* %w0) {
entry:
%0 = load i32, i32* %r0, align 4
%tobool = icmp ne i32 %0, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
br label %return
if.end: ; preds = %entry
%call = call i32* @internal_ret1_rrw(i32* %r0, i32* %r0, i32* %w0)
%1 = load i32, i32* %r0, align 4
store i32 %1, i32* %w0, align 4
%call1 = call i32* @internal_ret0_nw(i32* %r0, i32* %w0)
%call2 = call i32* @internal_ret0_nw(i32* %w0, i32* %w0)
%call3 = call i32* @external_sink_ret2_nrw(i32* %r0, i32* %r0, i32* %w0)
%call4 = call i32* @external_ret2_nrw(i32* %r0, i32* %r0, i32* %w0)
br label %return
return: ; preds = %if.end, %if.then
%retval.0 = phi i32* [ %call4, %if.end ], [ %w0, %if.then ]
ret i32* %retval.0
}
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-NEXT: define i32* @external_source_ret2_nrw(i32* %n0, i32* %r0, i32* returned %w0)
define i32* @external_source_ret2_nrw(i32* %n0, i32* %r0, i32* %w0) {
entry:
%call = call i32* @external_sink_ret2_nrw(i32* %n0, i32* %r0, i32* %w0)
%call1 = call i32* @external_ret2_nrw(i32* %n0, i32* %r0, i32* %w0)
ret i32* %call1
}
; Verify that we see only expected attribute sets, the above lines only check
; for a subset relation.
;
; CHECK-NOT: attributes #
; CHECK: attributes #{{.*}} = { nofree nosync nounwind }
; CHECK: attributes #{{.*}} = { nofree norecurse nosync nounwind }
; CHECK: attributes #{{.*}} = { nosync }
; CHECK-NOT: attributes #
|