36872b5db9
This modification of the currently unused inter-procedural constant propagation pass (IPConstantPropagation) shows how abstract call sites enable optimization of callback calls alongside direct and indirect calls. Through minimal changes, mostly dealing with the partial mapping of callbacks, inter-procedural constant propagation was enabled for callbacks, e.g., OpenMP runtime calls or pthreads_create. Differential Revision: https://reviews.llvm.org/D56447 llvm-svn: 351628
88 lines
2.3 KiB
LLVM
88 lines
2.3 KiB
LLVM
; RUN: opt -ipconstprop -S < %s | FileCheck %s
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;
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;
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; /---------------------------------------|
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; | /----------------------|----|
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; | | /-----| |
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; V V V | |
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; void broker(int (*cb0)(int), int (*cb1)(int), int (*cb2)(int), int, int);
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;
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; static int cb0(int zero) {
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; return zero;
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; }
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; static int cb1(int unknown) {
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; return unknown;
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; }
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; static int cb2(int unknown) {
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; cb0(0);
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; return unknown;
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; }
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; static int cb3(int unknown) {
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; return unknown;
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; }
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; static int cb4(int unknown) {
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; return unknown;
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; }
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;
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; void foo() {
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; cb0(0);
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; cb3(1);
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; broker(cb0, cb1, cb0, 0, 1);
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; broker(cb1, cb2, cb2, 0, 1);
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; broker(cb3, cb2, cb3, 0, 1);
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; broker(cb4, cb4, cb4, 0, 1);
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; }
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define internal i32 @cb0(i32 %zero) {
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entry:
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; CHECK: @cb0
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; CHECK-NEXT: entry
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; CHECK-NEXT: ret i32 0
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ret i32 %zero
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}
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define internal i32 @cb1(i32 %unknown) {
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entry:
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; CHECK: ret i32 %unknown
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ret i32 %unknown
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}
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define internal i32 @cb2(i32 %unknown) {
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entry:
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%call = call i32 @cb0(i32 0)
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; CHECK: ret i32 %unknown
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ret i32 %unknown
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}
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define internal i32 @cb3(i32 %unknown) {
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entry:
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; CHECK: ret i32 %unknown
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ret i32 %unknown
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}
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define internal i32 @cb4(i32 %unknown) {
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entry:
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; CHECK: ret i32 %unknown
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ret i32 %unknown
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}
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define void @foo() {
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entry:
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%call = call i32 @cb0(i32 0)
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%call1 = call i32 @cb3(i32 1)
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call void @broker(i32 (i32)* nonnull @cb0, i32 (i32)* nonnull @cb1, i32 (i32)* nonnull @cb0, i32 0, i32 1)
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call void @broker(i32 (i32)* nonnull @cb1, i32 (i32)* nonnull @cb2, i32 (i32)* nonnull @cb2, i32 0, i32 1)
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call void @broker(i32 (i32)* nonnull @cb3, i32 (i32)* nonnull @cb2, i32 (i32)* nonnull @cb3, i32 0, i32 1)
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call void @broker(i32 (i32)* nonnull @cb4, i32 (i32)* nonnull @cb4, i32 (i32)* nonnull @cb4, i32 0, i32 1)
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ret void
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}
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declare !callback !3 void @broker(i32 (i32)*, i32 (i32)*, i32 (i32)*, i32, i32)
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!0 = !{i64 0, i64 3, i1 false}
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!1 = !{i64 1, i64 4, i1 false}
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!2 = !{i64 2, i64 3, i1 false}
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!3 = !{!0, !2, !1}
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