175 lines
4.9 KiB
LLVM
175 lines
4.9 KiB
LLVM
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; RUN: opt -ipsccp -S %s | FileCheck %s
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; Test 1.
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; Both arguments and return value of @callee can be tracked. The inferred range
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; can be added to call sites.
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define internal noundef i32 @callee(i32 %x) {
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; CHECK-LABEL: @callee(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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ret i32 %x
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}
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define i32 @caller1() {
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; CHECK-LABEL: @caller1(
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; CHECK-NEXT: [[C1:%.*]] = call i32 @callee(i32 10), !range [[RANGE_10_21:![0-9]+]]
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; CHECK-NEXT: [[C2:%.*]] = call i32 @callee(i32 20), !range [[RANGE_10_21]]
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; CHECK-NEXT: [[A:%.*]] = add i32 [[C1]], [[C2]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%c1 = call i32 @callee(i32 10)
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%c2 = call i32 @callee(i32 20)
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%a = add i32 %c1, %c2
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ret i32 %a
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}
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define i32 @caller2(i32 %x) {
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; CHECK-LABEL: @caller2(
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; CHECK-NEXT: [[X_15:%.*]] = and i32 [[X:%.*]], 15
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; CHECK-NEXT: [[C:%.*]] = call i32 @callee(i32 [[X_15]]), !range [[RANGE_10_21]]
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; CHECK-NEXT: ret i32 [[C]]
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;
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%x.15 = and i32 %x, 15
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%c = call i32 @callee(i32 %x.15)
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ret i32 %c
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}
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; Test 2.
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; The return value of @callee2 can be tracked, but arguments cannot, because
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; it is passed to @use_cb1. We cannot infer a range for the return value, no
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; metadata should be added.
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declare void @use_cb1(i32 (i32)*)
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define internal noundef i32 @callee2(i32 %x) {
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; CHECK-LABEL: @callee2(
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; CHECK-NEXT: ret i32 [[X:%.*]]
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;
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ret i32 %x
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}
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define void @caller_cb1() {
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; CHECK-LABEL: @caller_cb1(
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; CHECK-NEXT: [[C1:%.*]] = call i32 @callee2(i32 9)
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; CHECK-NOT: !range
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; CHECK-NEXT: [[C2:%.*]] = call i32 @callee2(i32 10)
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; CHECK-NOT: !range
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; CHECK-NEXT: call void @use_cb1(i32 (i32)* @callee2)
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; CHECK-NEXT: ret void
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;
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%c1 = call i32 @callee2(i32 9)
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%c2 = call i32 @callee2(i32 10)
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call void @use_cb1(i32 (i32)* @callee2)
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ret void
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}
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; Test 3.
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; The return value can be tracked and it the result range ([500, 601) does not
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; depend on the arguments, which cannot be tracked because @callee3 is passed
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; to @use_cb2. The result range can be added to the call sites of @callee.
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declare void @use_cb2(i32 (i32)*)
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define internal noundef i32 @callee3(i32 %x) {
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; CHECK-LABEL: @callee3(
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[X:%.*]], 10
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; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i32 500, i32 600
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; CHECK-NEXT: ret i32 [[S]]
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;
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%c = icmp eq i32 %x, 10
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%s = select i1 %c, i32 500, i32 600
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ret i32 %s
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}
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define void @caller_cb2() {
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; CHECK-LABEL: @caller_cb2(
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; CHECK-NEXT: [[C1:%.*]] = call i32 @callee3(i32 9), !range [[RANGE_500_601:![0-9]+]]
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; CHECK-NEXT: [[C2:%.*]] = call i32 @callee3(i32 10), !range [[RANGE_500_601]]
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; CHECK-NEXT: call void @use_cb2(i32 (i32)* @callee3)
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; CHECK-NEXT: ret void
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;
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%c1 = call i32 @callee3(i32 9)
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%c2 = call i32 @callee3(i32 10)
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call void @use_cb2(i32 (i32)* @callee3)
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ret void
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}
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; Test 4.
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; The return value of @callee4 can be tracked, but depends on an argument which
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; cannot be tracked. No result range can be inferred.
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declare void @use_cb3(i32 (i32, i32)*)
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define internal noundef i32 @callee4(i32 %x, i32 %y) {
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; CHECK-LABEL: @callee4(
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[X:%.*]], 10
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; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i32 500, i32 [[Y:%.*]]
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; CHECK-NEXT: ret i32 [[S]]
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;
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%c = icmp eq i32 %x, 10
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%s = select i1 %c, i32 500, i32 %y
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ret i32 %s
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}
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define void @caller_cb3() {
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; CHECK-LABEL: @caller_cb3(
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; CHECK-NEXT: [[C1:%.*]] = call i32 @callee4(i32 11, i32 30)
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; CHECK-NOT: !range
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; CHECK-NEXT: [[C2:%.*]] = call i32 @callee4(i32 12, i32 40)
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; CHECK-NOT: !range
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; CHECK-NEXT: call void @use_cb3(i32 (i32, i32)* @callee4)
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; CHECK-NEXT: ret void
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;
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%c1 = call i32 @callee4(i32 11, i32 30)
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%c2 = call i32 @callee4(i32 12, i32 40)
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call void @use_cb3(i32 (i32, i32)* @callee4)
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ret void
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}
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; Test 5.
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; Range for the return value of callee5 includes undef. No range metadata
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; should be added at call sites.
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define internal noundef i32 @callee5(i32 %x, i32 %y) {
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; CHECK-LABEL: @callee5(
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; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[X:%.*]], 15
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; CHECK-NEXT: br i1 [[C]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RES:%.*]] = phi i32 [ [[Y:%.*]], [[BB1]] ], [ undef, [[BB2]] ]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c = icmp slt i32 %x, 15
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br i1 %c, label %bb1, label %bb2
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bb1:
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br label %exit
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bb2:
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br label %exit
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exit:
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%res = phi i32 [ %y, %bb1 ], [ undef, %bb2]
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ret i32 %res
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}
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define i32 @caller5() {
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; CHECK-LABEL: @caller5(
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; CHECK-NEXT: [[C1:%.*]] = call i32 @callee5(i32 10, i32 100)
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; CHECK-NOT: !range
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; CHECK-NEXT: [[C2:%.*]] = call i32 @callee5(i32 20, i32 200)
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; CHECK-NOT: !range
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; CHECK-NEXT: [[A:%.*]] = add i32 [[C1]], [[C2]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%c1 = call i32 @callee5(i32 10, i32 100)
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%c2 = call i32 @callee5(i32 20, i32 200)
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%a = add i32 %c1, %c2
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ret i32 %a
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}
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; CHECK: [[RANGE_10_21]] = !{i32 0, i32 21}
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; CHECK: [[RANGE_500_601]] = !{i32 500, i32 601}
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