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
43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
; RUN: opt -ipconstprop -S < %s | FileCheck %s
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;
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; #include <threads.h>
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; thread_local int gtl = 0;
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; int gsh = 0;
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;
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; static int callee(int *thread_local_ptr, int *shared_ptr) {
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; return *thread_local_ptr + *shared_ptr;
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; }
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;
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; void broker(int *, int (*callee)(int *, int *), int *);
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;
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; void caller() {
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; broker(>l, callee, &gsh);
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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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@gtl = dso_local thread_local global i32 0, align 4
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@gsh = dso_local global i32 0, align 4
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define internal i32 @callee(i32* %thread_local_ptr, i32* %shared_ptr) {
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entry:
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; CHECK: %tmp = load i32, i32* %thread_local_ptr, align 4
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; CHECK: %tmp1 = load i32, i32* @gsh, align 4
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; CHECK: %add = add nsw i32 %tmp, %tmp1
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%tmp = load i32, i32* %thread_local_ptr, align 4
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%tmp1 = load i32, i32* %shared_ptr, align 4
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%add = add nsw i32 %tmp, %tmp1
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ret i32 %add
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}
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define dso_local void @caller() {
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entry:
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call void @broker(i32* nonnull @gtl, i32 (i32*, i32*)* nonnull @callee, i32* nonnull @gsh)
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ret void
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}
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declare !callback !0 dso_local void @broker(i32*, i32 (i32*, i32*)*, i32*)
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!1 = !{i64 1, i64 0, i64 2, i1 false}
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!0 = !{!1}
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