Link HPVM paper in ACM DL

hpvm/docs/index.rst

@@ -6,7 +6,7 @@ The HPVM Compiler Infrastructure
 HPVM is a compiler for heterogeneous parallel systems.
 For more about what HPVM is, see `our website <https://publish.illinois.edu/hpvm-project/>`_
 and publications:
-`HPVM (PPoPP'18) <https://dl.acm.org/doi/pdf/10.1145/3200691.3178493>`_,
+`HPVM (PPoPP'18) <https://dl.acm.org/doi/10.1145/3200691.3178493>`_,
 `ApproxHPVM (OOPSLA'19) <https://dl.acm.org/doi/10.1145/3360612>`_,
 `ApproxTuner (PPoPP'21) <https://dl.acm.org/doi/10.1145/3437801.3446108>`_.
 
@@ -19,7 +19,7 @@ The intended audience for HPVM includes researchers and developers working in th
 compilers, programming languages, approximate computing, software optimization,
 static and dynamic program analysis, and systems for machine learning.
 
-`HPVM <https://dl.acm.org/doi/pdf/10.1145/3200691.3178493>`_
+`HPVM <https://dl.acm.org/doi/10.1145/3200691.3178493>`_
 includes a retargetable compiler infrastructure that targets CPUs, GPUs, FPGAs, and accelerators
 (this release does not include accelerator support)
 and uses a portable compiler IR that explicitly represents data flow at the IR level,